The cowpea is produced in different environmental conditions in several regions of Brazil. It is crucial to select and develop cultivars that attend to the regional requirements with high productivity, adaptability, and stability, due to the interaction between the genotype and the environment. This research aimed to select strains of cowpea for the simultaneous presence of high genotypic productivity, adaptability, and stability in the North-eastern region of the state of Rio de Janeiro (Brazil) by the GGE-Biplot method. The study assessed 27 genotypes: 23 strains and four cultivars, in six environments of the North-eastern region of the state of Rio de Janeiro, during the years 2016, 2017, and 2018. The experimental design was a randomized block design with four repetitions. The GGE-Biplpot method assessed the genotypic adaptability and stability, by the use of the statistical software R. The interaction between the environment and the genotypes was complex, and the general average for the productivity of the grains was 1231.98 kg/ha. GGE-Biplot method was efficient in identifying the best strains to be suggested for the use in the North-eastern region of the state of Rio de Janeiro. The strains (9), (3), and (6) were classified as ideotypes due to their superior performance compared to the general average, and their stability. Their performance overcame the control cultivars BRS Tumucumaque, BRS Imponente, BRS-Itaim e CB-27.

中文翻译：

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通过GGE Biplot方法分析豇豆品系的表型适应性和稳定性

豇豆在巴西的几个地区在不同的环境条件下生产。由于基因型与环境之间的相互作用，因此选择和开发满足区域要求且具有高生产力、适应性和稳定性的栽培品种至关重要。本研究旨在通过 GGE-Biplot 方法选择在里约热内卢（巴西）东北部地区同时存在高基因型生产力、适应性和稳定性的豇豆菌株。该研究在 2016 年、2017 年和 2018 年期间在里约热内卢州东北部地区的六个环境中评估了 27 个基因型：23 个菌株和四个栽培品种。 实验设计是随机区组设计，重复四次. GGE-Biplpot法通过使用统计软件R对基因型适应性和稳定性进行评估。环境与基因型之间的相互作用复杂，谷物生产力的一般平均值为1231.98 kg/ha。GGE-Biplot 方法可以有效地确定建议用于里约热内卢州东北部地区的最佳菌株。菌株 (9)、(3) 和 (6) 被归类为理想型，因为它们与一般平均水平相比具有优越的性能，并且具有稳定性。它们的性能超过了对照品种 BRS Tumucumaque、BRS Impente、BRS-Itaim e CB-27。GGE-Biplot 方法可以有效地确定建议用于里约热内卢州东北部地区的最佳菌株。菌株 (9)、(3) 和 (6) 被归类为理想型，因为它们与一般平均水平相比具有优越的性能，并且具有稳定性。他们的表现超过了对照品种 BRS Tumucumaque、BRS Impente、BRS-Itaim e CB-27。GGE-Biplot 方法可以有效地确定建议用于里约热内卢州东北部地区的最佳菌株。菌株 (9)、(3) 和 (6) 被归类为理想型，因为它们与一般平均水平相比具有优越的性能，并且具有稳定性。他们的表现超过了对照品种 BRS Tumucumaque、BRS Impente、BRS-Itaim e CB-27。