Genetic Divergence Studies in Foxtail millet (Setaria italica L. P. Beauv)
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Date
2023-08-14
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Agriculture University, Jodhpur
Abstract
An experiment entitled “Genetic Divergence Studies in Foxtail millet
(Setaria italica L. P. Beauv)’’ was conducted with 36 genotypes in khraif season 2022
at Instructional Farm, College of Agriculture, Jodhpur (Rajasthan). The experiment was
put out in Randomized Block Design (RBD) with three replications. The observations
of days to 50% flowering, number of productive tillers per plant, plant height, days to
maturity, flag leaf length, flag leaf width, ear length, ear width, straw weight, harvest
index, 1000 grain weight, grain protein, SCMR and grain yield per plant were recorded.
Analysis of variance exhibited significant difference for all the trait,
indicating the good amount of inherent variation were present. The phenotypic
coefficient of variance was higher as compare to genotypic coefficient of variance for
all the trait under study. The highest value of PCV and GCV was recorded for straw
weight and chlorophyll content, while high heritability with high genetic advance were
number of productive tillers per plant, ear width, straw weight and chlorophyll content.
Analysis of correlation coefficient indicted that the grain yield per plant had
positive significant correlation with ear width and straw weight. According to path
analysis, the trait like flag leaf length, harvest index, straw weight and SCMR showed
positive direct effect on grain yield per plant.
The genetic divergence calculated by Mahalanobis D² statistics, grouped 36
genotypes into 11 cluster. Maximum intra cluster distance was recorded in cluster Ⅸ
followed by cluster Ⅳ and cluster Ⅰ. Maximum inter cluster distance recorded between
cluster Ⅲ and XI. Among the genotype showed a good level of divergence.
Out of 36 genotypes GP-21, SiA3156, GP-217, SiA3222, GP-205, SiA3058,
GP-118 and GP-180 were found superior in grain yield and for other characters based
on mean performance. Hence, these genotypes would be used as parental source for
future breeding programme.
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Citation
Yadav, Yogendar 2023. Genetic Divergence Studies in Foxtail millet (Setaria italica L. P. Beauv). M.Sc. Thesis, College of Agriculture, Agriculture University, Jodhpur