Resumo -O objetivo deste trabalho foi avaliar a variabilidade de genótipos de feijão-caupi e selecionar aqueles com potencial para o mercado de vagens e grãos verdes. Em 2012, foram avaliados 16 genótipos em dois experimentos (sequeiro e irrigado), em delineamento de blocos ao acaso, com quatro repetições. Foram avaliados os caracteres: número de dias para o início da floração, comprimento de vagem verde, número de grãos por vagem verde, massa de cem grãos verdes, produtividade de vagens verdes, produtividade de grãos verdes e índice de grãos verdes. A maioria dos caracteres apresentou diferenças quanto ao ambiente de cultivo, mas a resposta dos genótipos às variações ambientais foi similar. Os genótipos, sob irrigação, apresentaram produtividade de vagens e grãos verdes similar à das testemunhas. A cultivar Azulão-MS, em sequeiro, apresentou alto potencial para a produção de vagens verdes, no entanto, com baixa relação grão verde/vagem verde. A cultivar BRS Tumucumaque apresenta potencial para a produtividade de grãos verdes em sequeiro, enquanto a linhagem MNC00-595F-27 produz mais em condições de irrigação.Termos para indexação: Vigna unguiculata, feijão verde, irrigação, sequeiro. Potential of genotypes for fresh pod and fresh-shelled cowpea marketAbstract -The objective of this work was to evaluate the variability of cowpea genotypes and to select those with potential for fresh pod and fresh-shelled cowpea market. In 2012, 16 genotypes were evaluated in two experiments (rainfed and irrigated), which were conducted in a randomized complete block design with four replicates. The following traits were evaluated: number of days for flowering start, fresh pod length, number of seed per fresh pod, weight of hundred fresh grains, fresh pod yield, fresh grain yield, and fresh grain index. Most of the traits showed differences according to the growth environment, but the response of genotypes to environmental variations was similar. Genotypes under irrigation conditions showed fresh pod and seed yield similar to the ones of the checks. The Azulão-MS cultivar under rainfed conditions showed a high potential for fresh pod yield, however, it had a low relationship fresh-shelled seed/fresh pod. The BRS Tumucumaque cultivar has potential for fresh seed yield under rainfed conditions, while the MNC00-595F-27 line is more productive under irrigation.

The objective of this work was to select cowpea genotypes simultaneously for high yield of immature grains, adaptability, and genotypic stability, taking into account genotype x environment interactions. The mixed models restricted maximum likelihood (REML)/best linear unbiased prediction (BLUP) were used. Sixteen cowpea genotypes were evaluated in nine environments, consisting of a combination of location (Pentecoste in the state of Ceará, Acaraú in Ceará, Teresina in Piauí, and Mossoró in Rio Grande do Norte, Brazil) and year (2012, 2013, 2014, 2015, and 2017). In all trials, a randomized complete block design with four replicates was used. Significant differences were observed for effects of genotypes and the genotype x environment interaction. Environmental variance was the largest component of phenotypic variance, followed by the genotype x environment interaction and genotypic variances. The immature grain yield of the evaluated cowpea genotypes interacts strongly with the studied environments, resulting in a low genotypic correlation between environments. The MNC00-595F-27, MNC05-847B-123, and BRS Tumucumaque cowpea genotypes present high yield of immature grains, adaptability, and genotypic stability, being the most suitable for cultivation in the states of Ceará, Piauí, and Rio Grande do Norte or in other environments with similar soil and climatic conditions.