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Performance of sweetpotato cultivars and elite genotypes in subtropical southern Brazil
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Silva, Giovani Olegario da

; Melo, Raphael Augusto de C e

; Vendrame, Larissa P de C

; Mello, Alexandre FS

; Bortoletto, Antonio César

; Feldberg, Nelson P

; Carvalho, Agnaldo DF de

; Amaro, Geovani Bernando

Horticultura Brasileira

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2023, Volume 41 elocation e2589

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT The average yield and quality of sweetpotato in Brazil are below the crop potential due to several traits that can be improved by plant breeding. This study aimed to evaluate the performance of sweet potato advanced clones with potential to be released as new cultivars, recommend cultivars with better attributes for grower's needs at the subtropical region of Brazil or to be used as parents in breeding programs. The genotypes MD1604002, MD1611010, MD1609023, MD1609024, MD1609026, and MD1610036 and cultivars Brazlândia Roxa, Beauregard, BRS Cuia, BRS Amélia, and BRS Rubissol, were evaluated during two seasons 2020/2021 and 2021/2022, in Canoinhas-SC. The experiments were conducted in complete randomized blocks design with four replications where plots were composed of three rows with 15 plants each, spaced 0.75 m apart with 0.35 m between plants. Storage roots were harvested 180 days after planting and evaluated for yield, appearance, insect damage, and shape characteristics. ‘BRS Rubissol’, the genotype MD1610036, with higher root yield, storage roots shape, appearance, and less susceptible to insect damage, and MD1609024, with a good root yield, similar or superior to cultivars Brazlândia Roxa, Beauregard, and BRS Amélia, stood out, and have potential to be cultivated in this region. ‘Brazlândia Roxa’ and genotype MD1611010 are potential sources of resistance genes to insect damage, which is one of the biggest challenges in sweetpotato production in Brazil.

RESUMO A produtividade média e a qualidade da batata-doce no Brasil estão abaixo do potencial da cultura, devido, dentre outros fatores, a caracteres que podem ser melhorados pelo melhoramento genético de plantas. Este trabalho teve como objetivo avaliar o desempenho de clones avançados de batata-doce com potencial para serem lançados como novas cultivares, e também recomendar cultivares com melhores características para produtores da região subtropical do Brasil, ou para serem utilizadas como genitores em programas de melhoramento. Os genótipos de batata-doce MD1604002, MD1611010, MD1609023, MD1609024, MD1609026 e MD1610036 e as cultivares Brazlândia Roxa, Beauregard, BRS Cuia, BRS Amélia e BRS Rubissol, foram avaliados durante duas safras 2020/2021 e 2021/2022, em Canoinhas-SC. Os experimentos foram conduzidos em delineamento de blocos completos casualizados com quatro repetições de parcelas compostas por três linhas com 15 plantas cada, espaçadas 0.75 m com 0.35 m entre plantas. As raízes foram colhidas 180 dias após o plantio e avaliadas quanto ao rendimento, aparência, danos causados por insetos e características de formato. Destacam-se ‘BRS Rubissol’ e o genótipo MD1610036 com elevado rendimento, formato, a aparência de raízes, e menos suscetíveis a danos por insetos, além de MD1609024, com rendimento de raízes similar ou superior às cultivares Brazlândia Roxa, Beauregard e BRS Amélia, se destacaram e apresentam potencial para serem cultivados nesta região. ‘Brazlândia Roxa’ e o genótipo MD1611010 são potenciais fontes de genes de resistência a danos causados por insetos, que é um dos maiores desafios na produção de batata-doce no Brasil.

https://doi.org/10.1590/s0102-0536-2023-e2589

‘BRS F50’ (Cecilia): A multi-purpose potato cultivar with resistance to foliar disease
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Pereira, Arione S

; Silva, Giovani O da

; Carvalho, Agnaldo DF de

; Castro, Caroline M

; Emygdio, Beatriz M

; Azevedo, Fernanda Q

; Bortoletto, Antonio Cesar

; Hirano, Elcio

; Gomes, Cesar B

; Lourenço Junior, Valdir

; Eicholz, Eberson D

; Ragassi, Carlos Francisco

; Coradin, Juliana H

; Dutra, Leonardo F

; Lopes, Carlos Alberto

; Reisser Junior, Carlos

; Lima, Natércia LP

; Pinheiro, Jadir B

; Lima, Mirtes F

; Ferri, Núbia ML

; Krolow, Ana Cristina R

; Maldonade, Iriani R

; Jorge, Rogério O

; Pilon, Lucimeire

; Ueno, Bernardo

; Feldberg, Nelson P

; Vizzotto, Márcia

Horticultura Brasileira

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2023, Volume 41 elocation e2667

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT ‘BRS F50’ (Cecilia) is a yellow skin potato cultivar for the fresh market, with good tuber appearance and versatile culinary use. The tuber has oval shape, shallow eyes, and light yellow flesh. It has a relatively high dry matter and medium-low glucose content, giving possibility even to use for processing into shoestring fries. The vegetative cycle and dormancy are medium. The maturity and tuber dormancy are medium. ‘BRS F50’ (Cecilia) shows a very low external and internal tuber disorder incidence, except growing cracks under varying soil humidity. It is moderately resistant to late and early blight, which make it also suitable for organic production. ‘BRS F50’ (Cecilia) was released by Embrapa in 2022, and is a product of its potato breeding program, developed by Embrapa Clima Temperado, in Pelotas-RS and Canoinhas-SC, and Embrapa Hortaliças, in Brasília-DF, Brazil.

RESUMO ‘BRS F50’ (Cecilia) é uma cultivar de batata de película amarela para o mercado in natura, com boa aparência de tubérculo e versátil uso culinário. O tubérculo tem formato oval, olhos rasos e polpa amarela clara. Apresenta um teor de matéria seca relativamente alto e teor de glicose médio-baixo, dando-lhe a possibilidade de uso até mesmo para processamento de batata palha. O ciclo vegetativo e período de dormência são médios. A maturidade e a dormência dos tubérculos são médias. ‘BRS F50’ (Cecilia) apresenta incidência baixa de desordens fisiológicas externas e internas nos tubérculos, exceto rachaduras de crescimento sob umidade variável do solo. É moderadamente resistente à requeima e à pinta preta, o que a torna também adequada à produção orgânica. ‘BRS F50’ (Cecilia) foi lançada pela Embrapa em 2022, e é produto de seu programa de melhoramento de batata, desenvolvido pela Embrapa Clima Temperado, em Pelotas-RS e Canoinhas-SC, e Embrapa Hortaliças, em Brasília-DF, Brasil.

https://doi.org/10.1590/s0102-0536-2023-e2667

Evaluation of potato clones for agronomic and processing traits in conventional and organic crop systems
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Silva, Giovani O da

; Carvalho, Agnaldo DF de

; Ragassi, Carlos Francisco

; Pereira, Arione da S

; Bortoletto, Antônio César

; Feldberg, Nelson P

; Lopes, Carlos Alberto

; Emygdio, Beatriz M

Horticultura Brasileira

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2023, Volume 41 elocation e2587

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT This work aimed to evaluate the performance of potato genotypes for tuber yield, processing quality traits, and plant vigor, under conventional and organic crop systems. The experiments in conventional system were carried out during the springs of 2018 and 2019 in Canoinhas-SC, while both conventional and organic crop systems were performed in 2020‘s winter in Brasília-DF, Brazil. Fourteen advanced clones, five of them selected in organic system (OS), and check cultivars Atlantic (chipping), Markies, and Asterix (french fry) were evaluated. A randomized complete block design with four replications was used. Clones F63-10-13A and EP121 performed well for tuber yield in all experiments. F129-12-08 presented a good frying quality, and F63-12-04 had a tuber yield and frying quality similar to ‘Asterix‘. OD38-06 had a tuber yield similar to ‘Asterix‘ and ‘Markies‘, and frying quality similar to ‘Markies‘. In general, the clones developed in the OS had better performance in that system, however some of them also performed well in the conventional system, while some developed in conventional system also performed well in the OS, such as F63-10-13A.

RESUMO Este trabalho teve como objetivo avaliar o desempenho de genótipos de batata para produtividade de tubérculos, características de qualidade de processamento e vigor de plantas, em sistemas de produção convencional e orgânico (OS). Experimentos em sistema convencional foram conduzidos na primavera de 2018 e 2019 em Canoinhas-SC, enquanto que ambos sistemas convencional e orgânico foram conduzidos no inverno de 2020 em Brasília-DF, Brasil. Quatorze clones avançados, cinco deles desenvolvidos em OS, e as cultivares testemunhas Atlantic (para chips), Markies e Asterix (para fritas em palitos) foram avaliados. O delineamento experimental foi blocos completos casualizados com quatro repetições. Os clones F63-10-13A e EP121 apresentaram bom desempenho para rendimento de tubérculos em todos os experimentos. F129-12-08 apresentou qualidade de fritura muito boa e F63-12-04 obteve rendimento de tubérculos e qualidade de fritura similares à ‘Asterix‘. OD38-06 obteve rendimento de tubérculos semelhante à ‘Asterix‘ e ‘Markies‘, e qualidade de fritura similar à ‘Markies‘. Em geral os clones desenvolvidos em OS tiveram melhor desempenho naquele sistema, mas alguns também se destacaram no sistema convencional, enquanto que alguns desenvolvidos em sistemas convencional também tiveram bom desempenho no OS, a exemplo do F63-10-13A.

https://doi.org/10.1590/s0102-0536-2023-e2587

Growth, tuber yield and quality of potato clones and cultivars
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Silva, Giovani Olegario da

; Rodrigues, Erciso MP

; Pereira, Arione da S

; Azevedo, Fernanda Q

; Emygdio, Beatriz M

; Santos, Leandro A

; Ragassi, Carlos Francisco

; Carvalho, Agnaldo DF de

; Bortoletto, Antônio César

; Feldberg, Nelson P

; Lopes, Carlos Alberto

Horticultura Brasileira

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2023, Volume 41 elocation e2536

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT This study aimed to evaluate the plant performance of two advanced potato clones compared to two standard cultivars. Field experiments were carried out in Canoinhas-SC, Pelotas-RS and Brasília-DF. The experimental design was in randomized blocks with four replications of plots composed of 44 useful plants plus borders. Four plant samples per plot were collect 30, 44, 56, 72, 86 and 100 days after planting. Morpho-agronomic characters were evaluated throughout the crop cycle, and at the end of the crop cycle tuber yield and frying quality were determined. There was a direct relationship between tuber yield and shoot development. For these characters, both clones F63-10-07 and F21-07-09 presented superior values compared to the standard cultivars in Pelotas, and these together with ‘Atlantic’ were superior to ‘Asterix’ in Canoinhas. In Brasilia, the standard cultivars showed greater shoot development, but the final marketable yield was not statistically different. F63-10-07 and ‘Atlantic’ have a lower stem number per plant, indicating the need to manage this character to adjust the stem density in the field.

RESUMO O presente estudo objetivou avaliar o desempenho das plantas de dois clones avançados de batata comparativamente a duas cultivares padrões. Os experimentos foram conduzidos em Canoinhas-SC, Pelotas-RS e Brasília-DF. O delineamento experimental foi em blocos casualizados com quatro repetições de parcelas compostas por 44 plantas úteis, além das bordaduras. Coletas destrutivas de quatro plantas por parcela foram realizadas aos 30, 44, 56, 72, 86 e 100 dias após o plantio. Caracteres morfoagronômicos foram avaliados ao longo do ciclo da cultura, e ao final do ciclo a produtividade de tubérculos e a qualidade de fritura foram determinadas. Verificou-se uma relação direta de produção de tubérculos com desenvolvimento da parte aérea das plantas. Quanto a esses caracteres, ambos os clones F63-10-07 e F21-07-09 apresentam valores superiores em comparação às cultivares padrão em Pelotas, e esses, juntamente com ‘Atlantic’, são superiores à ‘Asterix’ em Canoinhas. Em Brasília as duas cultivares apresentaram maior desenvolvimento da parte aérea, mas a produção comercial final não foi estatisticamente diferente. F63-10-07 e ‘Atlantic’ apresentam menor número de hastes por planta, indicando a necessidade de manejo dessa característica para ajustar a densidade de hastes por área.

https://doi.org/10.1590/s0102-0536-2023-e2536

Comportamento de genótipos de algodoeiro no Estado de São Paulo: produtividade, resistência a doenças e qualidade da fibra
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Cia, Edivaldo

; Fuzatto, Milton Geraldo

; Kondo, Júlio Isao

; Sabino, Nelson Paulieri

; Galbieri, Rafael

; Lüders, Reginaldo Roberto

; Carvalho, Luiz Henrique

; Ito, Margarida Fumiko

; Erismann, Norma de Magalhães

; Chiavegato, Ederaldo José

; Bolonhezi, Denizart

; Foltran, Dulcineia Elizabete

; Kasai, Francisco Seiiti

; Bortoletto, Nelson

; Gallo, Paulo Boller

; Recco, Paulo César

; Rossetto, Raffaela

Ciência Rural

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apr 2008, Volume 38 N. 2 Pages 326 - 331

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Foram realizados 16 experimentos em campo, no ano agrícola de 2001/02, nas principais regiões produtoras de algodão do Estado de São Paulo, objetivando avaliar o comportamento de 12 genótipos de algodoeiro em relação à produtividade, à qualidade da fibra e à resistência a seis doenças da cultura. Foi utilizado o delineamento de blocos completos ao acaso, com quatro repetições, cada uma delas representada por duas linhas de 5 metros de comprimento. Diferenças substanciais foram observadas entre os genótipos com respeito à produtividade, quer de algodão em caroço, quer de fibra. Apesar de se mostrar destacada em alguns genótipos, a porcentagem de fibra não constituiu fator predominante na produção de fibra por área. Entre as 12 cultivares estudadas, somente "CNPA ITA 90" e "BRS IPÊ" apresentaram bom índice de resistência à ramularia. Por outro lado, a "IAC 24" apresentou bom índice para murcha de Fusarium, nematóides e ramulose, as três doenças mais destrutíveis. A maioria das cultivares e linhagens estudadas revelou suscetibilidade a uma ou mais das doenças estudadas, não apresentando genótipo com resistência múltipla a todas as doenças consideradas.

In the 2001/02 growing season 16 field experiments were conducted in the main cotton producing regions of the state of São Paulo to evaluate the performance of 12 cotton genotypes for yield, fiber quality and resistance to six diseases of the crop. A randomized complete block design with four replications, which were represented by two five-meter-long rows now used. Substantial differences between genotypes were observed for both cotton seed and fiber. Although outstanding in some genotypes, the fiber percentage was not a determining factor of fiber yield per area. Among the 12 genotypes studied, only 'CNPA ITA 90' and 'BRS IPÊ' presented good index of resistance to the ramularia. On the other hand, 'IAC 24' presented good index for Fusarium, nematodes and ramulose, the three more destructible diseases.Most of the evalueted cultivars and lines were susceptible to one or more diseases; none of them showed multiple resistance to all diseases.

2015 downloads

Adaptabilidade e estabilidade de genótipos de amendoim de porte rasteiro
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Oliveira, Eder Jorge de

; Godoy, Ignácio José de

; Moraes, Andrea Rocha Almeida de

; Martins, Antônio Lúcio Mello

; Pereira, José Carlos Vila Nova Alves

; Bortoletto, Nelson

; Kasai, Francisco Seiiti

Pesquisa Agropecuária Brasileira

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aug 2006, Volume 41 N. 8 Pages 1253 - 1260

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O comportamento produtivo de genótipos de amendoim (Arachis hypogaea L.) foi avaliado a partir de três diferentes métodos de adaptabilidade e estabilidade. Foram avaliadas 18 linhagens e as cultivares Runner IAC 886 e IAC Caiapó, quanto à produtividade de vagens (PV) e peso de 100 grãos (P100G), em dez ensaios de campo, no Estado de São Paulo, utilizando-se os métodos de ecovalência, Eberhart & Russel e Lin & Binns. Foram observadas diferenças significativas para o efeito de genótipo (G), ambiente (E) e interação (GxE), para as duas variáveis. As linhagens L123, L137 e L150 foram as mais produtivas, com comportamento estável e previsível. O método de Lin & Binns mostrou-se mais discriminante na avaliação da PV e do P100G, enquanto o método de Eberhart & Russel foi mais útil na indicação das linhagens com adaptabilidade ampla ou específica a determinados ambientes. Os métodos de Lin & Binns e de Eberhart & Russel foram mais informativos que o de ecovalência, na predição do comportamento das linhagens para as duas características. Foi encontrada correlação negativa entre a PV e o parâmetro Pi, e positiva entre deltaij e ômegai. Para P100G, detectaram-se as mesmas correlações de PV, além da correlação negativa entre Pi e ômegai.

The performance of peanut (Arachis hypogaea L.) genotypes was assessed using three different adaptability and stability methods. Eighteen lines and two cultivars, Runner IAC 886 and IAC Caiapó, were evaluated for pod yield (PY) and one hundred kernel weight (HKW), in ten field trials in the State of São Paulo, using ecovalance, Eberhart & Russel and Lin & Binns methods. Significant differences for genotype (G), environment (E) and interaction (GxE) effects were observed for both variables. The lines L123, L137 and L150 were most productive and showed stable and predictable behavior. Lin & Binns methods was more sensitive for PY and HKW, while the Eberhart & Russel method was more useful for indicating lines with broad and specific adaptability to environmental conditions. Moreover, the Lin & Binns and Eberhart & Russel methods were more informative than ecovalance in predicting the behavior of genotypes for those two characteristics. Negative correlation between PY and Pi parameter, and positive correlation between deltaij and omegaI were found. Negative correlation was observed between one HKW and Pi, and between Pi and omegai.

2006 downloads Cited 9 times in SciELO

Age-age correlation for early selection of rubber tree genotypes in São Paulo State, Brazil
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Gonçalves, Paulo de Souza

; Bortoletto, Nelson

; Cardinal, Átila Bento Beleti

; Gouvêa, Lígia Regina Lima

; Costa, Reginaldo Brito da

; Moraes, Mário Luiz Teixeira de

Genetics and Molecular Biology

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dec 2005, Volume 28 N. 4 Pages 758 - 764

Abstract: En | Text: En | PDF: En

In a field trial involving 68 rubber tree (Hevea spp.) clones calculation of genotypic correlation coefficients revealed significant age-age correlation from age 1 to 6 (immature period) for girth A and for age 7 to 12 (mature period) for girth B and for age 7 to 12 (production of latex) for yield. Rank correlation coefficients between all immature ages of girth (girth A), all ages of mature girth (girth B) and all annual rubber production (yield) were significant for the three traits, with the coefficients decreasing with increasing age. Selection of the sets of best 30, 15, 10 and 5 clones from the available 68 clones at a given age was generally accompanied by a descending order of percentage success. It was suggested: (a) to have the best 30 clones of age 6, select the set of best 36 clones at age 2, (b) to have the best 15 clones of age 6, select the set of best 20 clones at age 3, (c) to have the best 5 clones of age 6, select the set of best 8 clones at age 4, and (d) to have the best 3 clones of age 6, select the set of best 3 clones at age 5. More than 80% of the targeted clones on girth A or girth B basis and more than 76.7% clones on yield basis were found to get selected at steps (a) through (d). For achieving early multiplication of the most productive clone for deployment, multiplication should be started with the best 36 (i.e. 60%) clones selected at age 2.

4361 downloads Cited 2 times in SciELO

Genetic variation in growth traits and yield of rubber trees (Hevea brasiliensis) growing in the Brazilian state of São Paulo
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Gonçalves, Paulo de Souza

; Moraes, Mário Luiz Teixeira de

; Bortoletto, Nelson

; Costa, Reginaldo Brito da

; Gonçalves, Elaine Cristine Pifer

Genetics and Molecular Biology

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dec 2005, Volume 28 N. 4 Pages 765 - 772

Abstract: En | Text: En | PDF: En

Analysis of variance and covariance was preformed on growth traits (stem girth, bark thickness, total height gain and rubber yield) of 22 open-pollinated progenies of the rubber tree Hevea brasiliensis from an Asian Hevea collection introduced to Agronomic Institute (Instituto Agronômico, Campinas, São Paulo, Brazil; IAC) in 1952. This progeny trial was replicated at three sites in São Paulo state and it was found that at three years from sowing there was statistically significant variation for girth, bark thickness, height and rubber yield. An individual test sites, values of individual plant heritability for girth ranged from h= 0.36 to h= 0.89 whereas values for heritability for progeny means ranged from h= 0.77 to h= 0.87. These moderate and high heritabilities suggest that a combination of progeny and within-progeny selection would be effective at increasing girth in this population at individual sites. Across sites, values of individual-plant heritability for girth ranged from h= 0.36 to h= 0.47, whereas values for heritability of progeny means girth ranged from h= 0.77 to h= 0.87. There were high positive genetic correlations between increased girth and bark thickness suggesting that breeding aimed at increasing girth would also increase bark thickness and possibly height.

3033 downloads Cited 2 times in SciELO

Genetic variability and selection for laticiferous system characters in Hevea brasiliensis
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Gonçalves, Paulo de Souza

; Cardinal, Átila Bento Beleti

; Costa, Reginaldo Brito da

; Bortoletto, Nelson

; Gouvêa, Lígia Regina Lima

Genetics and Molecular Biology

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sep 2005, Volume 28 N. 3 Pages 414 - 422

Abstract: En | Text: En | PDF: En

Six laticiferous system characters were investigated in 22 three-year-old, half-sib rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell.-Arg.] progenies, evaluated at three sites (Votuporanga, Pindorama and Jaú, all in the São Paulo State, Brazil). The traits examined were: average rubber yield (Pp), average bark thickness (Bt), number of latex vessel rings (Lv), average distance between consecutive latex vessel rings (Dc), density of latex vessels per 5 mm per ring averaged over all rings (Dd) and the diameter of the latex vessels (Di). The joint analysis showed that site effect and progeny x sites interaction were significant for all traits, except Lv. Estimates of individual heritabilities across the three sites were high for Bt; moderate for Lv, Pp and Dc; low for Dd and very low for Di. Genetic correlations in the joint analysis showed high positive correlations between Pp and the other traits. Selecting the best five progenies would result in genetic gains of 24.91% for Pp while selecting best two plants within a progeny would result in a Pp genetic gain of 30.98%.

2454 downloads Cited 2 times in SciELO

10.

Adaptação, estabilidade e potencial produtivo de genótipos de Triticum durum L., irrigados por aspersão, no Estado de São Paulo
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Felicio, João Carlos

; Camargo, Carlos Eduardo de Oliveira

; Pereira, José Carlos Vila Nova Alves

; Bortoletto, Nelson

; Gallo, Paulo Boller

; Ferreira Filho, Antonio Wilson Penteado

Bragantia

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2005, Volume 64 N. 3 Pages 377 - 387

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Avaliaram-se 17 linhagens e duas cultivares de Triticum durum L. tendo como testemunha a cultivar IAC 24 de T. aestivum L., em experimentos semeados em condições de irrigação por aspersão nas localidades de Votuporanga, Ribeirão Preto e Mococa, no período de 1998 a 2002, no Estado de São Paulo. Foram determinados os rendimentos de grãos e o comportamento de cada genótipo diante das variações ambientais. Análises de adaptação e estabilidade permitiram a identificação de genótipos com comportamento previsível a essas condições ambientais. Foram observados efeitos significativos para anos, locais e genótipos, destacando-se na média dos três locais quanto ao rendimento de grãos a linhagem de T. durum L. 11 (MEMOS"S"/YAV79/3/ SAPI"S"/TEAL"S"// HUI"S"). O melhor rendimento de grãos foi observado em Ribeirão Preto e o pior em Votuporanga. Observou-se nas linhagens 9 e 11 (MEMOS"S"/YAV79/3/SAPI"S"/TEAL"S"//HUI"S, 12 e 19 (GYS"S"/3/ STN"S"// HUI"S"/SOMOS"S") e 3 (STN"S"/3/TEZ"S"/YAV79// HUI"S") adaptabilidade específica, portanto, responsivas ao emprego de alta tecnologia. A incidência da ferrugem-da- folha somente foi constatada na cultivar IAC 24 da espécie de T. aestivum.

In order to evaluate Triticum durum L. genotypes having as control the T. aestivum L. cultivar IAC, 24 experiments were carried out, under sprinkler irrigation, at Votuporanga, Ribeirão Preto and Mococa locations, in the period 1998 to 2002, in the State of São Paulo. Grain yield and performance of each genotype in relation to the environment variation were evaluated. Adaptability and stability analysis were made identify genotypes with predictable performance in these environment conditions. Significant effects were observed for years, locations and genotypes. Considering the three locations, Triticum durum inbred line 11 (MEMOS"S"/YAV79/3/ SAPI"S"/TEAL"S"// HUI"S") presented the highest yield. The highest grain yields were observed in Ribeirão Preto and the lowest in Votuporanga. Inbred lines 9 and 11 (MEMOS"S"/79/3/SAPI"S"/TEAL"S"//HUI"S"), 12 and 19 (GYS"S"/3/STN"S"//HUI"S"/SOMOS"S") and 3 STN"S"/3/TEZ"S"/ (YAV79//HUI"S") showed specific adaptability, thus being responsive to high technology use. Leaf rust incidence was only verified in the T. aestivum cultivar IAC 24.

1282 downloads Cited 1 time in SciELO

11.

Avaliação de cultivares de mangueira selecionadas pelo Instituto Agronômico de Campinas comparadas a outras de importância comercial
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Carvalho, Cássia Regina Limonta

; Rossetto, Carlos Jorge

; Mantovani, Dilza Maria Bassi

; Morgano, Marcelo Antônio

; Castro, Josalba Vidigal de

; Bortoletto, Nelson

Revista Brasileira de Fruticultura

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aug 2004, Volume 26 N. 2 Pages 264 - 271

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Duas novas cultivares com resistência à seca-da-mangueira obtidas pelo Instituto Agronômico de Campinas, IAC 103 Espada Vermelha e IAC 109 Votupa, foram avaliadas em comparação com quatro cultivares de origem americana cultivadas no Estado de São Paulo: Tommy Atkins, Van Dyke, Palmer e IAC Haden 2H. Esta última é um clone selecionado da 'Haden 2H'. Foram avaliadas a produção, resistência às doenças e mosca-das-frutas bem como as características físicas e químicas dos frutos. A produtividade das cultivares foi avaliada em Votuporanga-SP, utilizando um ensaio em blocos completos ao acaso, com as seis cultivares e cinco repetições, com três plantas por parcela. A cultivar Palmer mostrou-se a mais produtiva, revelando boa adaptação às condições edafoclimáticas do local. Nenhuma cultivar foi resistente a todas as doenças, e a 'Haden 2H' foi a mais suscetível. A 'Espada Vermelha' mostrou-se resistente à mosca-das-frutas, e a 'Votupa' apresentou a maior porcentagem de polpa, próxima à das comerciais 'Van Dyke', 'Tommy Atkins' e 'Palmer'. O valor nutritivo e a composição química dos frutos foram avaliados no Instituto Agronômico e no Instituto de Tecnologia de Alimentos, em Campinas. A cultivar Espada Vermelha distinguiu-se das demais por ter apresentado características diferenciadas em alguns dos parâmetros químicos avaliados, principalmente quanto aos teores de minerais, carotenóides totais e de lipídeos, que proporcionaram intenso aroma e coloração aos seus frutos. 'Votupa', 'Palmer' e 'Van Dyke' apresentaram frutos mais ácidos e mais calóricos, enquanto as cultivares Espada Vermelha, Tommy Atykns e Haden 2H mostraram frutos de baixa acidez e de menor valor calórico.

Two new mango cultivars, IAC 103 Espada Vermelha and IAC 109 Votupa, resistant to the mango wilt caused by the fungus Ceratocystis fimbriata and selected by the "Instituto Agronômico de Campinas" (IAC), were compaired to four Floridian cultivars used for commercial production in the State of São Paulo: Tommy Atkins, Van Dyke, Palmer and IAC Haden 2H. This last one is a clone selected from the Haden 2H cultivar. The yield capacity of the cultivars was evaluated in a field experiment with six cultivars, five replications and three plants per plot, using a completely randomized blocks design, in Votuporanga, State of São Paulo. The yield, resistance to diseases and fruit-fly as well as physical and chemical parameters of the fruits were evaluated. The cultivar Palmer was the most productive, with good adaptation to the local soil and climatic conditions. 'Haden 2H' was the most susceptible cultivar. There was no cultivar resistant to all diseases and 'Espada Vermelha' showed some resistance to fruit-fly. The proportion of peel, pulp and seeds of the fruits were evaluated. The cultivar Votupa showed the highest percentage of pulp, which was similar to the commercial cultivars Van Dyke, Tommy Atkins and Palmer. To evaluate the nutritive value of the cultivars, the chemical composition of the fruits were made in "Instituto Agronômico de Campinas" and "Instituto de Tecnologia de Alimentos", both located in Campinas, State of São Paulo. The fruits were analysed for pH, soluble solids (ºBrix), total acidity, lipids, total protein, residual fixed minerals (ash), pectin, ascorbic acid, total carotene, total alimentary fibers, total carbohidrates and calories, and the content of calcium, cupper, iron, phosphorus, magnesium, manganese, potassium and zinc. The cultivar "Espada Vermelha" differed from the others by the chemical parameters, mainly in the mineral composition and in the content of total carotenoids and lipids, which provided intense flavor and coloration to its fruits. 'Votupa', 'Palmer' and 'Van Dyke' presented higher acidity and caloric fruits, whereas 'Espada Vermelha', 'Tommy Atykns' and 'Haden 2H' had fruits less caloric and with lower acidity.

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12.

Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil
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Gonçalves, Paulo de Souza

; Martins, Antonio Lúcio Mello

; Bortoletto, Nelson

; Saes, Luis Alberto

Genetics and Molecular Biology

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2004, Volume 27 N. 2 Pages 207 - 214

Abstract: En | Text: En | PDF: En

Five yield traits were investigated in three-year-old progenies from open-pollinated rubber trees [Hevea brasiliensis (Willd. ex Adr. de Juss) Muell.-Arg.]. Twenty progenies were evaluated in a randomized, complete block design replicated three times using 10 plants per linear plot at the North Central Experimental Station in Pindorama, São Paulo State, Brazil. The characters evaluated included the average yield of rubber, growth vigor, bark thickness, total number of latex vessel rings and latex vessel size. Highly significant (p < 0.01) genetic differences were observed among progenies for most traits. The genotypic variance components accounted for 13.2%, 12.3%, 9.4%, 3.4% and 0.23% of the phenotypic variance for yield, growth vigor, bark thickness, total number of latex vessel rings and latex vessel size, respectively. Heritabilities, as well as genotypic and phenotypic correlations among traits, were estimated. Heritabilities for the above traits at the individual plant level (<img border=0 id="_x0000_i1026" src="../../../../img/revistas/gmb/v27n2/a14img01.gif" align=absmiddle>) were 37%, 35%, 69%, 10% and 16%, respectively. Significant positive genotypic and phenotypic correlations were found between the yield of rubber and growth vigor (r g = 0.73, r p = 0.70), bark thickness (r g = 0.70**, r p = 0.75**) and the total number of latex vessel rings (r g = 0.64, r p = 0.80). There was no relationship between yield and latex vessel size, growth vigor or total number of latex vessel rings. Based on these data, selecting the best two out of 20 progenies would result in a genetic gain of 12.3% and 6.8% for yield of rubber and growth vigor, respectively. The two best individual ortets within each progeny would result in a genetic gain of 27.7% and 9.1%, with a total gain of 40% and 16% for these two traits, respectively.

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13.

Genotype-environment interaction and phenotypic stability for girth growth and rubber yield of Hevea clones in São Paulo State, Brazil
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Gonçalves, Paulo de Souza

; Bortoletto, Nelson

; Martins, Antonio Lúcio Mello

; Costa, Reginaldo Brito da

; Gallo, Paulo Boller

Genetics and Molecular Biology

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dec 2003, Volume 26 N. 4 Pages 441 - 448

Abstract: En | Text: En | PDF: En

The best-yielding, best vigour and most stable Hevea clones are identified by growing clones in different environments. However, research on the stability in Hevea brasiliensis (Willd. Adr. ex Juss.) Muell.-Arg. is scarce. The objectives of this work were to assess genotype-environment interaction and determine stable genotypes. Stability analysis were performed on results for girth growth and rubber yield of seven clones from five comparative trials conducted over 10 years (girth growth) and four years (rubber yield) in São Paulo State, Brazil. Stability was estimated using the Eberhart and Russell (1966) method. Year by location and location variability were the dominant sources of interactions. The stability analysis identified GT 1 and IAN 873 as the most stable clones for girth growth and rubber yield respectively since their regression coefficients were almost the unity (b = 1) and they had one of the lowest deviations from regressions (S2di). Their coefficient of determination (R²) was as high as 89.5% and 89.8% confirming their stability. In contrast, clones such as PB 235, PR 261, and RRIM 701 for girth growth and clones such as GT 1 for rubber yield with regression coefficients greater than one were regarded as sensitive to environment changes.

4747 downloads Cited 2 times in SciELO

14.

Modos de aplicação de regulador vegetal no algodoeiro, cultivar IAC-22, em diferentes densidades populacionais e níveis de nitrogênio em cobertura
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Furlani Junior, Enes

; Silva, Nelson Machado da

; Carvalho, Luiz Henrique

; Bortoletto, Nelson

; Sabino, José Carlos

; Bolonhezi, Denizart

Bragantia

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2003, Volume 62 N. 2 Pages 227 - 233

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Este trabalho foi desenvolvido nos anos agrícolas de 1996/97, 1997/98, 1998/99 e 1999/00, em experimentos de campo nas localidades de Ribeirão Preto, Tietê, Guaíra, Campinas e Ilha Solteira, no Estado de São Paulo. O delineamento experimental empregado foi o de blocos ao acaso com doze tratamentos arranjados em um esquema fatorial 3 x 2 x 2, visando estudar densidade de plantas (6 ; 10 e 14 plantas por metro); doses de nitrogênio em cobertura (40 e 60 kg.ha-1 de N) e modos de aplicação de regulador vegetal, com aplicação única, no início do florescimento ou parcelada em 4 vezes, desde o desbaste. O sistema de aplicação parcelada propiciou altura média de planta inferior e massa média de capulhos superior àquele obtido com a aplicação única do regulador. A aplicação da maior dose de N implicou obtenção dos maiores valores de N foliar e produtividade de algodão em caroço, bem como menor porcentagem de fibra. O aumento da densidade de plantas de 6 para 10 e 14 plantas por metro, ocasionou redução da porcentagem de fibra e da massa de capulhos.

The present work was developed during the growing seasons of 1996/97, 1997/98, 1998/99 and 1999/00 at Ribeirão Preto, Tietê, Guaíra, Campinas and Ilha Solteira, State of São Paulo, Brazil. The experimental design was the completely casualized blocks, using the factorial arrangement with twelve treatments (3 x 2 x 2) and four replications. The objective of this work was to study plant density (6; 10 and 14 plants/m); nitrogen levels at broadcasting (40 and 60 kg.ha-1 of N/ha) and types of growth regulator application (single application at flowering or splitting in four times, since the thinning). The split application conduced to lower height of plants and greater weight of bolls when compared to the single application of the growth regulator. The application of the highest level of N, increased the leaves nitrogen content in and cotton yield, and reduced the lint percentage. increasing plant density from 6 to 10 and 14 plants/m, reduced lint porcentage and bolls weight.

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15.

Desempenho de clones de seringueira de origem amazônica no planalto do Estado de São Paulo
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Gonçalves, Paulo de Souza

; Bortoletto, Nelson

; Sambugaro, Rosana

; Furtado, Edson Luiz

; Bataglia, Ondino Cleante

; Ortolani, Altino Aldo

; Godoy Júnior, Gentil

Pesquisa Agropecuária Brasileira

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dec 2001, Volume 36 N. 12 Pages 1469 - 1477

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O objetivo deste trabalho foi avaliar a adaptabilidade e expressão fenotípica de caracteres superiores de dez clones amazônicos de seringueira (Hevea spp.) no planalto do Estado de São Paulo em um período de 10 anos, obedecendo ao delineamento de blocos ao acaso com três repetições e parcelas lineares de seis plantas. O clone IAN 3156 foi o mais produtivo, com média de 65,57 g de borracha seca/árvore/sangria, no período de quatro anos, seguido pelo clone RO 45 com 52,29 g de borracha seca/árvore/sangria, enquanto o clone-testemunha, RRIM 600, produziu 41,04 g/árvore/sangria. Todos os clones apresentaram crescimento vigoroso. O perímetro do caule na abertura do painel variou de 37,01 cm (IAN 3193) a 49,41 cm (IAN 4493). A porcentagem de plantas aptas à sangria variou de 30,0% (IAN 3703) a 93,75% (IAN 6323). Exceto os clones IAN 3156 e IAN 4493 com 7,00 mm e 6,32 mm, respectivamente, todos os outros clones apresentaram espessura de casca virgem inferior ao clone RRIM 600, que apresentou 6,18 mm. O clone IAN 3193 apresentou maior incidência de quebra do ponteiro pelo vento. Todos os clones estudados apresentaram baixa incidência de secamento de painel. O bom desempenho dos clones IAN 3156, RO 45, Fx 3899 e IAN 4493 permite que possam ser experimentados em larga escala, envolvendo diferentes ambientes no Estado de São Paulo.

The objective of this paper was to evaluate, for a period of 10 years, the adaptability and phenotypic expression of superior characters of 10 clones of rubber tree (Hevea spp.) grown in the plateau of São Paulo State, Brazil. The clones in the field were arranged in a randomized block design with three replicates and six plants per linear plots. The results showed that the clone IAN 3156 recorded highest yield (65.57 g/tree/tap) followed by RO 45 (52.29 g/tree/tap), whereas the control clone RRIM 600 recorded 41.04 g/tree/tap over four years of tapping. All selected clones were vigorous, with girth range at opening varying from 37.01 cm (IAN 3193) to 49.41 cm (IAN 4493). The percentage range of plants able for opening were 30.0% for IAN 3703 to 93.75% for IAN 6323. Except for IAN 3156 with 7.0 mm and for IAN 4493 with 6.32 mm other clones had low thick virgin bark at open compared to the control clone RRIM 600, which recorded 6.18 mm. Concerned to wind damage, except for IAN 3193 all the studied clones experienced low incidence of wind damage. All clones showed low to very low incidence of tree dryness. A complementary evaluation of the best clones (IAN 3156, RO 45, Fx 3899 and IAN 4493) in different environment of the São Paulo State is suggested, to evaluate besides yielding other secondary characters with the purpose of future recommendation of planting material in large scale.

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