Genetic analysis of divergence among advanced free threshable emmer wheat mutants derived through inter-specific hybridization followed by mutation for quantitative traits
Ninety two mutant lines derived from inter-specific hybridization cum mutation involving emmer and durum wheat as source were evaluated for various quantitative traits. The mean values indicated existence of sufficient variability among the genotypes for all the traits studied representing pooling of positive alleles from both species. All the genotypes including parents were grouped into 11 clusters based on D² statistics. The inter-cluster distance and intra cluster distance indicated still there is scope to improve quality and yield traits through hybridization involving genotypes from different clusters. Yield, plant height and number of grains per spike contributed towards genetic divergence and these traits are major determinants of genetic variability in mutant populations. The present study indicated contribution of positive alleles for almost all the productivity traits and quality into durum background whereas, free threshability and test weight into dicoccum background and confer definite advantage of inter-specific hybridization cum mutation over simple inter-varietal hybridization.
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