ABSTRACT The grains of food-type soybean cultivars, which are characterized by the absence of lipoxygenases and the presence of high levels of proteins and isoflavones, are regarded as functional foods with high acceptance by consumers. However, few cultivars of food-type soybeans are currently available in the Brazilian market. The aim of this work was to study the adaptability and stability of various genotypes of food-type soybeans and to compare the performance of methods, which are based on analysis of variance, non-parametric, regression, multivariate and mixed models. Ten lines of food-type soybeans obtained from the Breeding Program of Soybeans for Human Consumption of the State University of Londrina (UEL/BPSHC) and two commercial varieties, the foodtype cultivar BRS 257 and the cultivar BMX Potência RR, were evaluated in the counties of Londrina, Guarapuava, Ponta Grossa and Pato Branco, Paraná, Brazil, during the two sowing seasons of the harvest of 2014/2015. The characteristic evaluated was grain yield. The adaptability parameters of Eberhart and Russel and Cruz methods showed high correlations with the Wricke model. The parameters provided by the analyses of Lins and Binns and REML/BLUP showed higher grain yield associations and moderated correlations with the Eskridge parameters. The AMMI offered the possibility of use in conjunction with the other methodologies. When yield, adaptability and stability were considered, the genotypes UEL 110, UEL 122, UEL 121 and UEL 123 demonstrated potential for the development of new cultivars of food-type soybeans in which lipoxygenases are absent.

O objetivo deste trabalho foi avaliar a variabilidade genética, o efeito ambiental e a estabilidade para o teor de proteína em grãos. Na safra da seca 2006, foram conduzidos dois experimentos, um para o grupo comercial carioca e outro para o grupo preto, em três locais do Estado do Paraná. O delineamento experimental utilizado foi o de blocos casualizados com três repetições e parcelas constituídas de quatro linhas de 5 m, espaçadas 0,50 m. Na maturidade fisiológica, retiraram-se amostras de 200 g de grãos de cada parcela experimental; estas foram armazenadas em câmara fria até a realização das análises do teor de proteína. A análise de variância conjunta revelou efeito significativo do genótipo, do ambiente e da interação genótipo por ambiente. Estes resultados indicam a existência de variabilidade genética entre as cultivares e linhagens de feijão estudadas e que esses genótipos comportaram-se de maneira diferenciada nos diferentes ambientes onde foram avaliados. Os genótipos de feijão que apresentaram maiores teores médios de proteína, ampla adaptabilidade e alta estabilidade de comportamento foram: FT120, FT Soberano, Xamego e LP99-96 (grupo preto); BRS Pontal, FT Magnífico, IAC Tibatã, IAPAR 81, IPR Juriti e Pérola (grupo carioca).

The objective this study was to evaluate the genetic variability, environmental effect and stability for the protein content in common bean grains. Two experiments were conducted: one for the carioca group and another for the black group, during the dry season of 2006, in three locations in the state of Paraná. A completely randomized block design was used, with three replications and plots consisting of four rows with 5 m, spaced 0.50m apart. Two-hundred-gram samples were collected from each plot at physical maturity. The grain samples were stored in a cold chamber. A joint analysis of variance showed significant genotype, environment and genotype-environment interaction effects. These results indicate the existence of genetic variability among the genotypes of the common bean, and each genotype showed different behavior in the different environments in which they were evaluated. The genotypes that showed higher average levels of protein, wide adaptability and high behavioral stability were: FT120, FT Soberano, Xamego and LP99-96 (black group); BRS Pontal, FT Magnífico, IAC Tibatã, IAPAR 81, IPR Juriti and Pérola (carioca group).

O objetivo deste trabalho foi avaliar a eficiência de diferentes métodos de estratificação ambiental, a representatividade dos locais de avaliação, e a adaptabilidade e estabilidade de genótipos de soja, por meio de ensaios de produtividade de grãos, nos estados do Paraná e Santa Catarina, nos anos agrícolas de 2000 a 2003, em um total de 15 ambientes. Foram utilizados, para estratificação ambiental, o método tradicional de Lin e a análise de fatores aliada ao porcentual de parte simples (PS%) da interação genótipo vs. ambiente (GxA). Na determinação da adaptabilidade e estabilidade dos genótipos, foram utilizados modelos baseados em regressão linear única e bissegmentada. Foram testados 21 genótipos de soja em delineamento de blocos ao acaso com três repetições, na avaliação da produtividade de grãos. O genótipo RB 605 apresenta ampla faixa de adaptação com elevada produtividade média de grãos. De acordo com ambos os métodos, as localidades de Palotina e Brasilândia do Sul podem ser reduzidas a somente um local de ensaio.A análise de fatores associada ao PS% da interação GxA é mais seletiva para estratificação ambiental, em relação ao método tradicional de Lin.

The objective of this work was to assess the efficiency of different methods of environmental stratification, the representation level of the evaluation places, and the adaptability and stability of soybean genotypes, through yield trials in the Paraná and Santa Catarina States, Brazil, in the agricultural years of 2000 to 2003, totaling 15 environments. For environmental stratification, the Lin's traditional method and factor analysis, allied to percentage of the simple portion (SP%) of genotype vs. environment interaction (GxE), were utilized. Adaptability and stability of the genotypes were determined by linear and bisegmented regression models. Twenty one soybean genotypes were evaluated on randomized complete blocks design, comprising three replications, and the analyzed variable was grain yield. RB 605 genotype is highly adapted and presents high yield. According to both methods, Palotina and Brasilândia do Sul localities can be reduced to one trial location. The factor analysis allied to SP% of GxE interaction is more selective to environmental stratification in relation to the Lin's traditional method.

O objetivo deste trabalho foi verificar possíveis divergências entre os resultados obtidos nas avaliações da adaptabilidade de 27 genótipos de milho (Zea mays L.), e na estratificação de 22 ambientes no Estado do Paraná, por meio de técnicas baseadas na análise de fatores e regressão bissegmentada. As estratificações ambientais foram feitas por meio do método tradicional e por análise de fatores, aliada ao porcentual da porção simples da interação GxA (PS%). As análises de adaptabilidade foram realizadas por meio de regressão bissegmentada e análise de fatores. Pela análise de regressão bissegmentada, os genótipos estudados apresentaram alta performance produtiva; no entanto, não foi constatado o genótipo considerado como ideal. A adaptabilidade dos genótipos, analisada por meio de plotagens gráficas, apresentou respostas diferenciadas quando comparada à regressão bissegmentada. A análise de fatores mostrou-se eficiente nos processos de estratificação ambiental e adaptabilidade dos genótipos de milho.

The objective of this work was to verify possible divergences among results obtained on adaptability evaluations of 27 maize genotypes (Zea mays L.), and on stratification of 22 environments on Paraná State, Brazil, through techniques of factor analysis and bissegmented regression. The environmental stratifications were made through the traditional methodology and by factor analysis, allied to the percentage of the simple portion of GxE interaction (PS%). Adaptability analyses were carried out through bissegmented regression and factor analysis. By the analysis of bissegmented regression, studied genotypes had presented high productive performance; however, it was not evidenced the genotype considered as ideal. The adaptability of the genotypes, analyzed through graphs, presented different answers when compared to bissegmented regression. Factor analysis was efficient in the processes of environment stratification and adaptability of maize genotypes.

The purpose of this research was to elucidate the genetic control of orange corona color in carioca common beans (Phaseolus vulgaris). We made four crosses between carioca group cultivars that differed in respect to the presence or absence of an orange hilum corona color. The F2, F3, F1BC11, F1BC21, F2BC11 and F2BC21 phenotypic segregations were evaluated with a chi-square test which fitted with the hypothesis that one gene with a dominant allele is responsible for the orange corona color. All generations resulting from the four different crosses showed segregation patterns which agreed with the expected proportions. Our results show that the dominant G allele controls orange corona color in the carioca bean group.