DIALLEL ANALYSIS TO STUDY GENE ACTION FOR SOME POLYGENIC TRAITS IN HEXAPLOID WHEAT (Triticum aestivum L.)

This experiment was carried out to elucidate the gene action controlling the inheritance of some quantitative traits like days to heading, days to maturity, plant height, number of tillers per plant, peduncle length and flag leaf area using 5x5 diallel cross. The wheat lines/varieties were 9272, 9277, 9381, Lasani-2008 and Sehar-2006. Days to heading, plant height and number of tillers per plant were under the influence of partial dominance. However, peduncle length and flag leaf area were controlled by partial dominance with additive type of gene action indicating early selection for improvement in these parameters, while over dominance was recorded for days to maturity suggested fruitful selection in later generations.