MAHAMAYA BANIK, NILANJAYA* AND V. K. SHARMA
Department of Plant Breeding and Genetics, Dr Rajendra Prasad Central Agricultural University,
Pusa, Samastipur (Bihar), India
Department of Agricultural Biotechnology and Molecular biology, Dr Rajendra Prasad Central Agricultural University, Pusa, Samastipur (Bihar), India
*(e-mail : email@example.com)
(Received : 11 April 2021; Accepted : 15 June 2021)
Thirty cowpea genotypes was evaluated for interaction of genotype and environment (G×E) over six different environments viz., four environment under open field irrigated condition and two under rain-out shelter, during kharif season of 2019 and 2020 at Pusa Farm of Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar by adopting randomized block design with three replications and spacing 45×10 cm. Based on G×E interaction study the sources of variation for genotype (G), environment (E) and G×E interaction was found highly significant. In GGE biplot analysis (‘What won where’ biplot) indicated G4 (Kashikanchan) genotype was winner equally in both E3 and E6 environment; and genotype G3 (EC 390268) was ideal as well as highest seed yielder. For days to maturity genotype G29 was winner in both E4 and E5 followed by E1 and E2 and genotype G30 (Bundel Lobia-1) was found ideal genotype for days to maturity. GGE biplot graphical evaluation for seed yield per plant and days to maturity revealed E1 was best environment followed by E2 and E4 for selecting stable fodder cowpea genotype adapted for the region.
Key words: Fodder cowpea, rain-out shelter, seed yield, GGE biplot, GxE interaction