Genetic Divergence in Ashwagandha [Withania somnifera (L.) Dunal]
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Date
2018
Authors
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Publisher
MPUAT, Udaipur
Abstract
Genetic Divergence in ashwagandha [Withaniasomnifera(L.)Dunal]
Kapil Kumar Nagar* Dr. R. B.Dubey The present investigation entitled“Genetic Divergence inashwagandha [Withania
somnifera (L.)Dunal]” was carried outwith63 diverse genotypes of ashwagandha
includingthree standard checks viz., JA-20 (Jawahar Ashwagandha-20), JA-134 (Jawahar
Ashwagandha-134) and RVA-100 (Raj Vijay Ashwagandha). The diverse genotypeswere
collected from different agro climatic zone of Rajasthan.The experiment was laid out in
randomized block design with three replicationsduringkharif-2017at Botany field, Rajasthan
College of Agriculture, in Udaipur.
Observations were recorded for fifteen characters on ten randomly selected
competitive plants for each genotype in each replication except some of the characters which
were recorded on whole plot basis viz.,of day to flowering,days to 75 percent maturity, plant
height,number of primary branches per plant,number of secondary branches per plant,leaf
area index,root length (cm),root diameter in collar region (mm),fresh root yield (g/plant),dry
root yield (g/plant),fresh plant weight(g/plant),dry plant weight (g/plant),100 seed weight
(g),harvest index(%), total alkaloid content (%). Sixty three genotypes (includes 3 checks)
were evaluated for fifteen characters and analysis of variance, correlation, path analysis and
genetic divergence were performed for the mean data.
The results revealed that a highest GCV and PCV were found for harvest index
(47.97, 50.97), dry root yield per plant (31.07, 34.67), dry plant weight per plant (31.48,
32.48). High h2 was found for total alkaloid content (98.37), dry plant weight per plant
(93.90), harvest index (88.58) and leaf area index (88.16). On the other hand high heritability
with high genetic advance was observed for fresh plant weight per plant and dry plant weight
per plant.High estimates of genetic advance were recorded for the character viz., fresh plant
weight per plant (49.99) and dry plant weight per plant (20.98).The dry root yield per plant
*P.G. Research Scholar, Department of Plant Breeding and Genetics, Rajasthan College of
Agriculture, Udaipur.
** Professor, Department of Plant Breeding and Genetics, Rajasthan College of Agriculture,
Udaipur.
was positively and significantly correlated at both phenotypic as well as genotypic level with
fresh root yield per plant and harvest index with dry root yield per plant yield per plant was
negatively and significantly correlated at both phenotypic as well as genotypic level with
days to flowering and number of primary branch per plant.
The highest positive direct effect on dry root yield per plant was exhibited by harvest
index followed by dry plant weight per plant, days to 75 per cent maturity, number of
secondary branches per plant, fresh plant weight per plant, leaf area index, plant height, root
length and total alkaloid content.On the basis of D2 analysis, 63 genotype of ashwagandha
were grouped into 8 clusters. The cluster VII had highest number of genotypes (18) followed
by 10 in cluster III,9 in cluster IV,8 in cluster V, 7 in cluster VI,5 in cluster I,4 in cluster
IIand 2 in cluster VIII.The average inter cluster values were maximum between cluster VII
and VIII followed by cluster II and VII. While maximum intra cluster distance was in cluster-
IIIfollowed by cluster-IV, cluster-II, cluster-
Description
Genetic Divergence in Ashwagandha
Keywords
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Citation
Nagar, K.K, and Dubey, R.B.