Abstract The objective of this work was to select sweet potato (Ipomoea batatas) genotypes with leaves with potential to be used for human consumption. Twenty-six experimental genotypes and four commercial cultivars were tested in a randomized complete block design with three replicates and ten plants per plot. The trial was carried out in the municipality of Lavras, in the state of Minas Gerais, Brazil. Leaf shape and lobe, aerial-part yield, edible-leaf yield, edible-leaf percentage, edible-leaf dry mass, and latex production, as well as leaf total chlorophyll, pH, soluble solids contents, titratable acidity, total phenolic compounds, and anthocyanin contents, were evaluated. Roots were characterized as to their pulp and peel colors. Fifteen genotypes presented the highest aerial-part (29.6 to 51.8 Mg ha-1) and edible leaf (7.8 to 12.7 Mg ha-1) yields. In the biochemical analysis, high contents of chlorophyll, total phenolics, and anthocyanins were observed. In addition, pH, soluble solids, and leaf titratable acidity did not differ significantly among the evaluated genotypes. Leaves of ten genotypes are recommended for human consumption.

Resumo O objetivo deste trabalho foi selecionar genótipos de batata-doce (Ipomoea batatas) com folhas com potencial para serem usadas para consumo humano. Vinte e seis genótipos experimentais e quatro cultivares comerciais foram testados em delineamento de blocos ao acaso, com três repetições e dez plantas por parcela. O ensaio foi realizado no município de Lavras, no estado de Minas Gerais, Brasil. Foram avaliados formato e lóbulo da folha, produção da parte aérea, produção de folhas comestíveis, percentagem de folha comestível, massa seca de folha comestível e produção de látex, bem como clorofila total, pH, conteúdo de sólidos solúveis, acidez titulável, compostos fenólicos totais e teor de antocianinas das folhas. As raízes foram caracterizadas quanto às cores da sua polpa e casca. Quinze genótipos apresentaram as maiores produtividades de parte aérea (29,6 a 51,8 Mg ha-1) e de folhas comestíveis (7,8 a 12,7 Mg ha-1). Nas análises bioquímicas, foram observados altos teores de clorofila, compostos fenólicos totais e antocianinas. Além disso, pH, sólidos solúveis e acidez titulável foliar não diferiram significativamente entre os genótipos avaliados. As folhas de dez genótipos são recomendadas para alimentação humana.

ABSTRACT The growing consumer demand for sweet potato roots results in the need for genotypes with higher yields and better root quality. Thus, the objective of this study was to agronomically evaluate sweet potato genotypes via mixed models to select superior genotypes for human consumption and predict their selection gains. The study had a partially balanced triple lattice design with three replicates. As treatments, 92 sweet potato genotypes from the Universidade Federal de Lavras germplasm bank selected in the first selection cycle were evaluated along with eight controls, namely, Brazlândia Roxa, Princesa, Uruguaiana, BRS Amélia, Beauregard, UFVJM-57, UFVJM-58, and UFVJM-61. The treatments were ranked by the mixed linear model via restricted maximum likelihood (REML) and best linear unbiased prediction (BLUP). We highlighted the 15 best genotypes for each agronomic trait, then identified the best ones overall considering all quantitative and qualitative traits. High heritability was found for the trait commercial root yield (56.31%). For all traits, there were selection gains relative to the population mean. The use of mixed models was efficient for the selection of superior sweet potato genotypes. The genotypes 2018-19-464, 2018-72-1409, 2018-72-1428, 2018-19-443, 2018-36-807, 2018-72-1418, 2018-19-455, 2018-72-1376, 2018-54-1137, 2018-54-1114, 2018-65-1249, and 2018-28-556 have good traits related to commercial root yield and root quality and may be recommended for human consumption.

Resumo O objetivo deste trabalho foi avaliar a produção e a qualidade dos frutos de genótipos de pimentão (Capsicum annuum) submetidos a várias densidades de plantio, em sistema orgânico de produção sob cultivo protegido. O experimento foi realizado em duplicata, para comparar o rendimento e a qualidade dos frutos dos genótipos de pimentão 'TE 300', ‘Mallorca’ e ‘Timor’ quanto às densidades de plantio de 2, 4, 6 e 8 plantas m-2. Utilizou se o delineamento de blocos ao acaso, com três repetições, em parcelas subdivididas. O tamanho e a massa médios dos frutos, a produção por planta e a produção total foram determinados. O teste de Dunnett foi usado para contrastar médias entre a densidade padrão de 2 plantas m-2 e as demais densidades. O teste de Scott-Knott foi usado para comparar as densidades dentro dos genótipos. O aumento da densidade de plantio no sistema orgânico proporcionou produção similar à do sistema convencional. A maior densidade aumenta a produção e encurta o ciclo de produção, sem prejudicar o tamanho ou a qualidade dos frutos dos genótipos ‘TE 300’ e 'Timor'. As densidades de 8 plantas m-2, para ‘TE 300’ e 'Timor', e a de 6 plantas m-2, para 'Mallorca', apresentam maior produção total por hectare.

Abstract The objective of this work was to evaluate the yield and fruit quality of sweet pepper (Capsicum annuum) genotypes grown at various planting densities, in an organic production system under protected cultivation. The experiment was carried out in duplicate, to compare the yield and fruit quality of the 'TE 300', 'Mallorca', and ‘Timor’ sweet pepper genotypes, at the densities of 2, 4, 6, and 8 plants m-2. A randomized complete block design was used, with three replicates, in split plots. Mean fruit size and mass, yield per plant, and total yield were measured. Dunnett’s test was used to compare means between the standard density of 2 plants m-2 and the other densities. Scott-Knott’s test was used to compare the densities within each genotype. The increase of planting density in the organic production system provided a yield similar to that of the conventional system. A greater density increases yield and reduces the production cycle, without impairing the fruit size or quality of the ‘TE 300’ and ‘Timor’ genotypes. The densities of 8 plants m-2 for ‘TE 300’ and 'Timor', and of 6 plants m-2 for ‘Mallorca’ show the highest total yield per hectare.