Studies onGenetic Divergence inPea(Pisumsativum L.
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Date
2019-12
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Studies on Genetic Divergence in Pea (Pisum sativum L.)” was
conducted at Vegetable Farm, Department of Vegetable Science, Dr Yashwant Singh Parmar University of
Horticulture and Forestry, Nauni, Solan (HP) during Rabi, 2017 to evaluate genotypes of pea and to study
variability, heritability, correlation and path analysis of different characters along with estimation of genetic
divergence among genotypes. The experiment was laid out in RCBD with three replications and 35 genotypes
including one check variety “Pb-89”, for studying the extent of variability and performance of each genotype.
The present studies revealed a significant difference among genotypes for all the characters studied. A wide
range of variability was observed for all the traits. Genotypes like Pusa Pragati, UHF-PEA-15, UHF-PEA-12
and EC 598536 were significantly superior over other genotypes and the check variety for yield and few other
horticultural important traits and can be recommended as such for direct cultivation after multilocational testing
in the state. The GCV and PCV were high to moderate for traits like green pod yield per plant, pod weight, pod
length and plant height. High heritability coupled with high to moderate genetic gain was observed for green
pod yield per plant, pod weight, pod length and plant height which suggests their improvement through simple
selection method. Correlation analysis revealed that traits like number of green pods per plant, pod weight, pod
length, pod width, pod girth, number of seeds per pod and shelling percentage had significant positive
correlation with green pod yield per plant both at phenotypic and genotypic level. Further, path coefficient
analysis indicated that pod weight had the highest positive direct effect on green pod yield per plant followed by
days to marketable maturity, number of green pods per plant and number of seeds per pod. Therefore, main
emphasis should be given on these characters, while making selection in pea genotypes. D2 Mahalanobis
analysis divided the genotypes into six clusters and revealed that the cluster III and IV were most divergent and
there will be more chances of getting better segregants in F2 and subsequent generations from the crossing of
genotypes from cluster III and IV. Thus, hybridization between the genotypes of these groups can be very
effective for further improvement inpea.
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