Análise de estabilidade do rendimento de 15 genótipos de Feijão Nhemba (Vigna unguiculata (L.) Walp) em 3 locais

Abstract

Variety development in genetic improvement programs is an activity that culminates with the release of promising varieties. However, before that, these varieties need to be compared with others in multi-site trials to understand their performance and the extent to which they adapt to different growing environments. Therefore, the present study aims to evaluate the adaptability and yield stability of cowpea (Vigna unguiculata (L.) Walp) genotypes in multi-site trials. To this end, on-site trials were established in the following locations: Chókwe, Maniquenique, and Nhacoongo. The treatments consisted of fifteen (15) genotypes, namely: INIA-41, P8-32-8, IT-1105, CB-46, CB-524B, 503 x P24 S/N (2), B21 x 499-13-2, B21 x 2246-4, 2246 x 503-9-5, 41 x 18-9-1, 499 x 18-1-13, B21x 2246-3-4, P5-21-5, 013-40, and 012-43. The genotype INIA-41 was used as a control, as it had already been released into the environments in question. The design used was the alpha-latice, with a 3-row and 5-column arrangement, in three replicates. The variables measured were: seed yield, number of pods per plant, number of seeds per pod, and 100-seed weight. The results indicated a strong genotype x environment interaction, and four genotypes were identified: 2246x503-9-5, 499x18-1-13, 41x18-9-1, and IT-1105. These genotypes exhibited high yield stability and higher productivity than the released INIA-41 genotype.(TRADUÇAO NOSSA)