Evaluation of genotype × environment relationship in silage maize genotypes using biplot analysis and stability index

Authors : Erkan ÖZATA
Pages : 50-61
View : 33 | Download : 16
Publication Date : 2020-12-30
Article Type : Research Paper
Abstract :This study was conducted to evaluate the adaptability and stability of silage maize hybrids determing herbage and dry matter yield using Biplot analysis and some stability indexes. The studies were carried out using five registered corn varieties under irrigated conditions for six years insert ignore into journalissuearticles values(2013-2018); in Çarşamba plain of Samsun province, Turkey. The experimental layout was a Randomized Complete Block Design with four replications. Finlay and Wilkenson`s regression and Eberhart and Russel`s deviation from regression insert ignore into journalissuearticles values(S2d); coefficients were used in statistical analysis. Genotype insert ignore into journalissuearticles values(G); x environment insert ignore into journalissuearticles values(E); interactions were studied using the additive main effects and multiplicative interaction insert ignore into journalissuearticles values(AMMI); and G + GE insert ignore into journalissuearticles values(GGE); biplot models. The combined analysis of variance revealed significant insert ignore into journalissuearticles values(P<0.01); effects of G, E and G × E interaction on herbage and dry matter yields. The analysis of variance indicated that 62.70% of variation in the herbage yield explained by E, 29.79% by the differences in G and 7.49% by the GE interaction. The analysis of variance indicated that 62.80% of the total variation in the dry matter yield accounted for E, 30.20% of the total variation by G and G × E interaction explained only 7.00% of the total variation in the data. The results of AMMI and GGE biplot models and stability analyses insert ignore into journalissuearticles values(R2, bi and S2di); revealed that PR31Y43 and Burak hybrids were stable in both herbage yield and dry matter yield.
Keywords : Dry matter yield, Herbage yield, GGE biplot, G×E interaction silage maize, Stability index

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