Assessment of genetic variability and quality parameters in Ricebean [ Vigna umbellata (Thunb.) Ohwi and Ohashi] germplasms
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Date
2017-07
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College of Forestry, Ranichauri Campus , V.C.S.G. Uttarakhand University of Horticulture and Forestry
Abstract
The present investigation was conducted during Kharif, 2015 at Research Block,
Department of Crop Improvement, V. C. S. G. Uttarakhand University of Horticulture and
Forestry, College of Forestry, Ranichauri Campus, Tehri Garhwal, Uttarakhand. The 34 diverse
genotypes of rice bean including four checks varieties viz., PRR-1, PRR-2, and RBL-1and
RBL-6 were evaluated in Augmented Design with four replications. Observation were
recorded for field and seed quality parameters. Field parameters were recorded for days to 50
per cent flowering, days to maturity, plant height (cm), pod length (cm), number of pods per
plant, number of primary branches, number of seeds per pod, 100 seed weight (g) , seed yield
per plant (g) and number of clusters per plant.
The seed quality parameters were recorded for speed of germination (%), standard
germination (%), root length (cm), shoot length (cm), seedling fresh weight (g), seedling dry
weight (g), moisture content (%) and accelerated ageing test. The data was analyzed for
estimation of mean, range, coefficients of variation, heritability and genetic advance,
correlation coefficients.
The genotypes RBL-1, PRR-1, IC-341986 and PRR-2 exhibiting high mean
performance for seed yield and their component. High magnitudes of phenotypic and
genotypic coefficient of variation were noticed for plant height, 100 seed weight and number
of pods per plant. High estimates of heritability coupled with high genetic advance as per
cent of mean were observed for clusters per plant, 100 seed weight, plant height and pods per
plant. Seed per pod exhibited very strong positive association with pod length, pods per
plant, clusters per plant and plant height at phenotypic and genotypic level. From this study it
is suggested that genotypes viz RBL-1, PRR-1, IC-341986 and PRR-2 can be utilized for
improving the yield of rice bean genotypes.
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