Studies on genetic variability for pod yield and its contributing traits in pea (Pisum sativum L.) in low hill conditions of Himachal Pradesh
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Date
2020-10-16
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COLLEGE OF HORTICULTURE AND FORESTRY, DR Y S P UHF, NERI, HAMIRPUR
Abstract
The present investigation entitled “Studies on genetic variability for pod yield and its
contributing traits in pea (Pisum sativum L.) in low hill conditions of Himachal Pradesh” was conducted
at the experimental farm of RHR&TS, Jachh, Kangra, Dr. YS Parmar University of Horticulture and Forestry,
Nauni, Solan, Himachal Pradesh during the year 2019. One hundred fifteen diverse genotypes of pea
comprising of one hundred nine exotic lines along with six check DMK- 11, Arkel, IC-279125, Rachna, DMR-7 and HFP-4 were evaluated in Augmented Block Design with five blocks to ascertain the extent of
genetic advance and gain, variability, heritability, correlation and path coefficient analysis for yield and other
horticultural traits along with the estimation of genetic divergence among the genotypes. Analysis of variance
revealed significant differences among all the genotypes for all the characters under study. Based on overall
performance, EC-838201, EC-838141, EC-838208 and EC-838166 were found superior for marketable pod
yield and other important horticultural traits. They could be promising parents for utilization in further
breeding programmes. The estimates of PCV and GCV were high for pod yield (kg/plot), number of pods per
plant, pod yield (q/ha), 100-seed weight, plant height and number of seeds/grains/pod. High heritability
estimates were recorded for all the traits among all genotypes while high estimates of genetic gain were
recorded for pod yield (kg/plot), pod yield (q/ha), plant height, number of pods per plant, 100-seed weight
and number of seeds/grains/pod. The correlation studies revealed that pod yield (q/ha) had positive and
significant correlation with number of pods per plant, pod length, shelling percentage, plant height, total
soluble solids, 100-seed weight, days to 50 % flowering, node at which first flower appear, shelling
percentage, total soluble solids, days to marketable maturity and the number of seeds per pod. The path
coefficient analysis revealed the maximum positive direct effect towards marketable pod length, days to
marketable maturity number of seeds per pod, number of pods per plant, 100-seed weight, number of pods
per plant, days to 50 % flowering and total soluble solids. Under genetic divergence studies 115 genotypes
were grouped into eight clusters and highest inter-cluster distance was recorded between cluster I and cluster
IV and lowest was observed between cluster III and cluster V. Therefore hybridization among the genotypes
of cluster V and cluster III can be utilized to obtain superior hybrids or recombinants in later segregating
generations.