Evaluation of G × E interaction in pearl millet using AMMI and GGE biplot analysis
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Date
2018
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CCSHAU
Abstract
In the present study, the G × E interaction in pearl millet (Pennisetum glaucum L.) genotypes from three zones of India have been evaluated using the techniques of AMMI and GGE biplot analysis. AMMI ANOVA indicated that environment contributes maximum part of variation followed by genotype × environment interaction and genotype. Interaction principal component axes i.e. IPCA1, IPCA2 and IPCA3 were found to be significant in all three zones. On the basis of ASV, genotypes MH 2091, MH 2120 and MH 2114 while from stability index, genotypes MH 2085, MH 2105 & MH 2108 were found to be most stable for Zone A1, Zone A and Zone B respectively. From YSI and WI, genotypes MH 2101 & MH 2091 and genotypes MH 2109 & MH 2107 were found most stable with high yield for Zone A1 and Zone A respectively while for Zone B, genotypes MH 2123 & MH 2113 and MH 2123 & MH 2114 were found most stable with high yield on the basis of YSI and WI respectively. SI (%) indicated two groups of stable genotypes i.e. very low & low for Zone A1 and low & moderate for Zone A and Zone B, respectively. Spearman‟s rank correlation coefficient between YSI and WI for all the three zones showed that the two indices have almost equal performance in determining high yielding stable genotypes. From scatter plot of normalized grain yield and normalized ASV most stable (Zone A1(MH 2085),Zone A(MH 2120)- and Zone B(MH 2120)), high yielding (Zone A1(MH 2098),Zone A(MH 2129)- and Zone B(MH 2106)) and most stable with high yielding (Zone A1(MH 2101),Zone A(MH 2109)- and Zone B(MH 2123)) genotypes were obtained. Three major aspects of GGE biplots indicated mega environment analysis, test environment evaluation and genotype evaluation. GGE biplots found the most stable genotypes MH 2087, MH 2098 & MH2081 for Zone A1, MH 2106 & MH 2129 for Zone A and MH 2103, MH 2106 & MH 2119 for Zone B. MH 2101, MH 2107 & MH 2113 were found to be high yielding genotypes for Zone A1, Zone A and Zone B, respectively. MH 2091, MH 2111 & MH 2106 were found to be most stable with high yielding genotypes for Zone A1, Zone A and Zone B.
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