Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Assessing the Impact of Genotype-by-Environment Interactions on Agronomic Traits in Elite Cowpea Lines Across Agro-ecologies in Nigeria

Bosede Olufunke Popoola
* ,
Patrick Obia Ongom
ORCID logo ,
Saba B. Mohammed
ORCID logo ,
Abou Togola
,
Daniel Jockson Ishaya
,
Garba Bala
,
Christian Fatokun
,
Ousmane Boukar
ORCID logo
Version 1 : Received: 27 November 2023 / Approved: 28 November 2023 / Online: 28 November 2023 (07:13:24 CET)

A peer-reviewed article of this Preprint also exists.

Popoola, B.O.; Ongom, P.O.; Mohammed, S.B.; Togola, A.; Ishaya, D.J.; Bala, G.; Fatokun, C.; Boukar, O. Assessing the Impact of Genotype-by-Environment Interactions on Agronomic Traits in Elite Cowpea Lines across Agro-Ecologies in Nigeria. Agronomy 2024, 14, 263. Popoola, B.O.; Ongom, P.O.; Mohammed, S.B.; Togola, A.; Ishaya, D.J.; Bala, G.; Fatokun, C.; Boukar, O. Assessing the Impact of Genotype-by-Environment Interactions on Agronomic Traits in Elite Cowpea Lines across Agro-Ecologies in Nigeria. Agronomy 2024, 14, 263.

Abstract

This study assessed the impacts of genotypes, environments, and their interaction on the performance of elite cowpea lines for key adaptive, grain yield, and associated traits across different locations. A total of 42 elite genotypes were evaluated in five Nigerian environments, representing various savanna ecologies during the 2021 growing season. The experimental design employed was an alpha lattice arrangement, replicating each genotype three times. The results revealed significant differences among genotypes, environments, and genotype-by-environment interaction for most traits, including days to maturity, 100 seed weight, and grain yield. GGE biplot showed G21 (IT14K-2111-2) and G25 (IT15K-2386-1) as the most stable genotypes across the five environments, G41(IT1K-61-82) was best adapted to Ibadan and Shika, G5 (245-1) was best adapted to Bagauda and Gumel while G30 (IT16K-2365-1) was best adapted to Bauchi. G21 and G25 could be recommended across the five test environments while G41, G30 and G5 are specific to the adapted environments.

Keywords

Cowpea (Vigna unguiculata); G x E interactions; stability; GGE biplot

Subject

Biology and Life Sciences, Agricultural Science and Agronomy

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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