Genetic variability and diversity for morphological and seed vigour parameters in barley (Hordeum vulgare L.)
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Date
2018
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CCSHAU
Abstract
The objectives of present investigation were to determine the magnitude of
variability, character association and to study the genetic divergence for various
morphological and seed vigour parameters in 50 genotypes of barley under timely and late
sown conditions. Significant variability was observed among genotypes for all the traits
studied under both the environments. The genotypes IBYT-HI-15, AZAD, BH 959, IBYT-HI-
19, BH 14-42 and BH 14-25 showed significantly higher grain yield than general mean under
timely sown condition and under late sown condition, the genotypes namely IBYT-HI-15, RD
2904, BH 902, IBYT-HI-13, HUB 242, IBYT-HI-17, DWR 137, K 560 and DWRB 101 have
been found promising. Genotypic correlation estimates under timely sown condition showed
significant positive association of grain yield per plot with harvest index, biological yield,
germination per cent, 1000 grain weight, accelerated ageing (48 h, 72 h) and days to maturity,
similarly under late sown conditions, positive and significant correlation of grain yield was
recorded with harvest index, biological yield, 1000 grain weight, vigour index-I, seedling dry
weight and number of tillers per meter. The path coefficient analysis revealed that biological
yield per plot, harvest index, seedling length and vigour index-II exerted highest positive
direct effects on grain yield per plot under both environments. The Euclidean cluster analysis
assigned all the genotypes into eight distinct clusters each under both the conditions. The
improvement in barley could be achieved through the use genotypes assigned in clusters I and
VII under timely sown, whereas the genotypes which contained in cluster II and VI might be
considered as potential parents under late sown to obtain high heterotic response and
consequently better segregants for grain yield.
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