Assessment of Genetic variability and Diversity for Yield and its Contributing Traits among CIMMYT Based Wheat Germplasm
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Authors
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Sunil Kumar Yadav
Jawaharlal Nehru Krishi Vishwa Vidyalaya, College of Agriculture, Rewa-486001(M.P.) India
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Akhilesh Kumar Singh
Allahabad Agriculture Institute-Deemed University. Allahabad-211007 (U.P.) India
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Satish Singh Baghel
Jawaharlal Nehru Krishi Vishwa Vidyalaya, College of Agriculture, Rewa-486001(M.P.) India
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Mahesh Jarman
Jawaharlal Nehru Krishi Vishwa Vidyalaya, College of Agriculture, Rewa-486001(M.P.) India
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Ashok Kumar Singh
Jawaharlal Nehru Krishi Vishwa Vidyalaya, College of Agriculture, Rewa-486001(M.P.) India
Keywords:
Wheat, genetic parameters, D2 statistics, clustering pattern, quantitative traits.Abstract
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 D2
value 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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