Genotype × environment interaction and adaptation of cowpea genotypes across six planting seasons

Authors : Abiola AJAYİ, Alaba GBADAMOSİ, Oluwatoyin OSEKİTA, Babatunde TAİWO, Ato Babawole FAWIBE, Iyanu ADEDEJİ, Temitope OMİSAKİN

Pages : 7-15

Doi:10.51753/flsrt.1036051

View : 19 | Download : 14

Publication Date : 2022-04-30

Article Type : Research Paper

Abstract :Cowpea exhibits significantly inconsistent performances across different environments, and hence demands performance evaluation of genotypes prior release or cultivation in every breeding program. Hence, the goal of this study was to compare 16 cowpea genotypes over six planting seasons insert ignore into journalissuearticles values(2014-2019); in Akungba-Akoko, Nigeria for their stability and adaptation through Finlay and Wilkinson insert ignore into journalissuearticles values(FW);, Additive Main Effects and Multiplicative Interaction insert ignore into journalissuearticles values(AMMI); and Genotype and Genotype × Environment insert ignore into journalissuearticles values(GGE); analyses. ANOVA revealed high significant genotype insert ignore into journalissuearticles values(15.33%);, environment insert ignore into journalissuearticles values(14.71%); and GEI insert ignore into journalissuearticles values(64.34%); effects for seed yield among genotypes. All analyses were able to pinpoint stable high-yielding genotypes including G14 and G9. Genotypes G14, G3, G4, G5, G6 and G9 were high yielding and stable according to FW; AMMI showed G10, G9, G16, G14 and G13 stable high-yielding while GGE showed G14, G16, G9 and G13 as stable high-yielding. As analyses explored the variation in the data due to GEI, they also complemented one another, in that where one erroneously included a wrong genotype as stable; the other excluded such genotype, making recommendation possible on the basis of consistency to gain reliability.
Keywords : Adaptation, Cowpea, GxE interaction, Stability, Yield