Genetic diversity analysis for grain yield and associated traits in advanced lines of bread wheat
DOI:
https://doi.org/10.31783/elsr.2020.615055Keywords:
bread wheat, genetic diversity, recombinant inbred lines, yieldAbstract
The grouping of 170 wheat genotypes with a variable number of advanced lines into 9 clusters Genetic diversity analysis of 170 genotypes into 9 clusters with variable number of advanced lines on genetic diversity analysis indicated the presence of a considerable amount of genetic diversity in the material. Cluster V was the largest as about 29 advanced lines belonged to this cluster followed by cluster I that possessed 27 RILs whereas cluster 1X was the smallest comprised of 10 advanced lines. The average intra-cluster distance between the advanced lines was maximum for cluster IV followed in descending order by clusters II, VI, VII, IX, VIII, V, III whereas cluster I exhibited the least intra-cluster distance. The inter-cluster distances was maximum between clusters II vs. VII followed by cluster IV vs. VII and VI vs. VII and was least for cluster I vs. II. The identification of promising genotypes for the improvement program in bread wheat revealed that RIL- 91from cluster IV was promising for plant height and number of spikelets per spike. RIL- 31 from cluster VII were found better for the number of grains per spike and grain yield per plant. RIL- 45 from cluster VIII could be explored for maximum hundred hundred-grain weight and minimum days to 50 percent heading as well. The maximum percent contribution towards the total genetic divergence was indicated for grain weight per spike followed by grain yield per plant, hundred hundred-grain weight, and plant height.
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