Identification of fodder cowpea genotypes by leveraging GGE Biplot under multi-environment introduction, Material and Methods, Results and Discussion, Conclusion, Reference

Abstract

Cowpea has the immense potential to be used as an important fodder crop under future climate scenarios due to its adaptability. Hence, it necessary to study on different fodder cowpea genotypes x environment interaction. In this context, an experiment was carried out with thirty fodder cowpea genotypes (G) containing check Bundel Lobia-1 at Pusa farm of Dr. RPCAU, Pusa, Samastipur, Bihar during kharif season of 2019 and 2020. Randomized Block Design was used with three replications and spacing 45 x 10 cm. The environment combinations were E₁ [Date of sowing (DOS) 15^th July 2019 in irrigated open field condition], E₂ (DOS- 26^th July 2019 in irrigated open field condition), E₃ (DOS- 15^th July 2019 in rain out shelter for drought condition), E₄ (DOS- 15^th July 2020 in irrigated open field condition), E₅ (DOS- 26^th July 2020 in irrigated open field condition) and E₆ (DOS- 15^th July 2020 in rain out shelter for drought condition). Ideal genotypes on the basis of GGE biplot “genotype view” was genotype G₃ for highest production efficiency (gm/m²/day) and G₂₉ for highest green fodder yield (gm/plant). “What – Won – Where” GGE biplot results showed existence of two mega environment, where genotype G₃ was winner in both E₃ and E₆ environment for production efficiency; whereas for green fodder yield also two mega environments were existed where G₃ was winner in E₆ and G₂₉ in E₄. The environment E₅ was found as best for identifying cowpea genotype adapted for the region for production efficiency and E₄ was best for green fodder yield.

Cowpea has the immense potential to be used as an important fodder crop under future climate scenarios due to its adaptability. Hence, it necessary to study on different fodder cowpea genotypes x environment interaction. In this context, an experiment was carried out with thirty fodder cowpea genotypes (G) containing check Bundel Lobia-1 at Pusa farm of Dr. RPCAU, Pusa, Samastipur, Bihar during kharif season of 2019 and 2020. Randomized Block Design was used with three replications and spacing 45 x 10 cm. The environment combinations were E₁ [Date of sowing (DOS) 15^th July 2019 in irrigated open field condition], E₂ (DOS- 26^th July 2019 in irrigated open field condition), E₃ (DOS- 15^th July 2019 in rain out shelter for drought condition), E₄ (DOS- 15^th July 2020 in irrigated open field condition), E₅ (DOS- 26^th July 2020 in irrigated open field condition) and E₆ (DOS- 15^th July 2020 in rain out shelter for drought condition). Ideal genotypes on the basis of GGE biplot “genotype view” was genotype G₃ for highest production efficiency (gm/m²/day) and G₂₉ for highest green fodder yield (gm/plant). “What – Won – Where” GGE biplot results showed existence of two mega environment, where genotype G₃ was winner in both E₃ and E₆ environment for production efficiency; whereas for green fodder yield also two mega environments were existed where G₃ was winner in E₆ and G₂₉ in E₄. The environment E₅ was found as best for identifying cowpea genotype adapted for the region for production efficiency and E₄ was best for green fodder yield.