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Genetic divergence in Ashwagandha [Withania somnifera (L.)

KrishiKosh

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Title Genetic divergence in Ashwagandha [Withania somnifera (L.)
 
Creator Mishra, Rajeev Kumar
 
Contributor Yadav, I. S.
 
Subject planting, Vegetative propagation, Yields, Genotypes, Fruits, Genetics, Sowing, drying, Developmental stages, Alkaloids
 
Description A field experiment was conducted during Kharif 2012 to study the genetic variability,
correlation, path coefficient analysis and genetic diversity for quantitative and qualitative
characters in Ashwagandha [Withania somnifera (L.)] with 45 genotypes including two checks in
randomized block design with three replications. Considerable amount of variability was found
for the 12 quantitative characters as indicated by the analysis of variance. Moderate to high GCV
and PCV, high heritability with high genetic advance observed for most of the yield attributing
characters. Fresh root yield per plant had highly significant and positive association with plant
height, number of berries per plant, root length and root diameter, revealing that selection based
on these characters would ultimately improve the fresh root yield. Path coefficient analysis
revealed that plant height, seed yield per plant, root length and root diameter had the highest
positive direct effect on fresh root yield at both genotypic and phenotypic levels. High estimate of
GCV and PCV was recorded for seed yield per plant, fresh weight of berries per plant and
number of berries per plant. High heritability was observed in characters like number of berries
per plant, fresh weight of berries per plant and seed yield per plant. Genetic advance as percent of
mean were recorded very high for seed yield per plant followed by fresh weight of berries per
plant and number of berries per plant. Promising genotypes having high fresh root yield are HWS
04-6 and HWS 128 and for total alkaloids content are HWS 222 and HWS 216. Hence, it would
be rewarding to lay stress on these characters for root yield improvement. Mahalanobis D
2
analysis revealed that among six clusters maximum diversity was observed between cluster II and
VI and maximum diversity within the cluster III. Number of berries per plant, plant height and
total alkaloids content observed the maximum contributing characters towards diversity.
Selection of genotypes from those clusters having high inter-cluster distance as parents in the
recombination breeding programmes is highly beneficial.
 
Date 2016-09-16T12:23:19Z
2016-09-16T12:23:19Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/77020
 
Language en
 
Format application/pdf
 
Publisher CCSHAU