Assessment of Genetic variability and Diversity for Yield and its Contributing Traits among CIMMYT Based Wheat Germplasm
2015
Yadav, Sunil Kumar | Singh, Akhilesh Kumar | Baghel, Satish Singh | Jarman, Mahesh | Singh, Ashok Kumar
Present experiment was carried out with ffty international bread wheat screening nursery (IBWSN) genotypes procured from CIMMYT, Mexico to study nature and magnitude of genetic variability and diversity for utilization in development of superior varieties. Genotypes were evaluated using a randomized complete block design with three replications. Days to 50 % fowering, days to maturity, plant height, tillers per meter, spike length, grains per spike, test weight, grain yield per plant were recorded. Analysis of variance showed suffcient amount of variability was found in the entire gene pool for all traits studied. Grain yield per plant showed highest genotypic and phenotypic coeffcient of variation. High heritability coupled with high genetic advance was recorded for grains per spike and grain yield per plant. Based on D2value the genotypes were grouped into eight different non-overlapping clusters.Highest inter-cluster distance was observed between cluster III and VIII followed by cluster (II &VIII) and (III &VII). This indicates that the genotypes included in these clusters have wide genetic diversity. Grain yield per plant (79.84 %) had highest contribution towards genetic divergence; hence, this trait was major determinants of genetic diversity.
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