AMMI and GGE biplots for G×E analysis of wheat genotypes under rain fed conditions in central zone of India
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Abstract
The highly significant environments, genotypes and G×E interaction observed by AMMI analysis of 17 wheat genotypes evaluated at 8 locations in the central zone of the country. Environments(E), genotypes -environment interaction(GE) and genotypes explained 68.8%, 17.6% and 3.2% of the total sum of squares respectively. First four interaction principal components accounted 33.7%, 30.2%, 14.6% and 12.6% of the G×E interaction variation, respectively. The highest positive IPCA1 score of genotype G8 followed by G11 and G10 supported by yield higher than the grand mean 21.8q/ha. Environments E4 (Jabalpur) and E8 (Partapgarh) recorded maximum yield 32.6q/ha and 28.4q/ha while lowest yield was realized in E1 (Arnej). GGE biplot analysis under polygon view indicated that G13 was better in E6 (Sagar), whereas G1 was better in E7 (Bilaspur) and E8 (Partapgarh). The genotype G1, at the centre of concentric circles, was the ideal genotype in terms of yield performance as compared to the other genotypes. In addition, G15 and G12, located on the next consecutive concentric circle, may be regarded as desirable genotypes.
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AMMI model, AMMI stability value, GGE biplot, Stability index
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