AMMI ANALYSIS OF ADAPTABILITY AND YIELD STABILITY OF PROMISING LINES OF BREAD WHEAT (Triticum aestavum L.) | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 47, Issue 7, December 2016, Pages 35-43 | ||
| Authors | ||
| F. A. Kadhem; F. Y. Baktash | ||
| Abstract | ||
| Additive main effects and multiplicative interactions (AMMI) model analysis was performed to assess and to quantify the magnitude of genotype by environment interaction and yield stability of bread wheat genotypes. Fifteen promising lines generated from a crossing program among six bread wheat (Triticum aestavum L.) pure lines were used in a randomized complete block design with four replications for five consecutive years (2009-2014). AMMI analysis of variance showed that the environment effect was a predominant source of variation (67.6% of the treatment SS) followed by GE interaction (21.1 %) and genotype effect (8.6%). First two interaction principal component axes (IPCA) cumulatively explained 92.75% of total interaction effects. A graphical interpretation of the AMMI analysis and GSI index incorporating the AMMI stability value (ASV) and the yield capacity of the different genotypes in a single non-parametric index were useful for discriminating genotypes with superior and stable grain yield. Based on AMMI biplot, G10 had general adaptability, and Based on ASV and Genotype stability index (GSI) genotypes G10,G15, and G2 revealed the highest stability. It seems that various measures of stability from AMMI model indicate similar aspects of yield stability and GEI nature. | ||
| Keywords | ||
| AMMI; stability; G x E interaction; ASV; GSI | ||
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