Vol. 7, Issue 5 (2019)
Estimation of genetic divergence in barley (Two-rowed and six-rowed) under different growing conditions
Author(s): Suman Devi, Yogender Kumar, Vikram Singh, Rakesh Kumar and Paras
Abstract: Genetic diversity among 50 barley genotypes was investigated using 18 different agro-morphological and seed vigour traits under timely and late growing conditions. The Euclidean cluster analysis assigned 50 barley genotypes into eight distinct clusters indicating presence of substantial genetic diversity in the evaluated breeding material. The average inter-cluster distance was found to be maximum between the cluster VIII and V (11.207) under timely and between cluster VI and IV (8.167) under late sown condition. The improvement in barley could be achieved through the use of 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. Under timely sown condition, cluster I comprised of six genotypes, exhibited minimum number of days to heading and maturity, moderate plant height and number of tillers per meter and had highest cluster means for number of grains per spike, grain yield per plot and harvest index. Cluster IV comprised of seven genotypes, also had high cluster means for number of tillers per meter, number of grains per spike, grain yield per plot and harvest index. Similarly, under late sown condition, cluster II which comprised of two genotypes had low cluster mean for days to heading; moderate for plant height; high for number of tillers per meter, 1000 grain weight and biological yield per plot; and highest for grain yield per plot as well as harvest index. Cluster VI, contained five genotypes recorded for minimum number of days to heading; shortest plant height; high number of tillers per meter; highest 1000 grain weight along with high mean values for grain yield per plot and harvest index. Number of grains per spike, electrical conductivity and days to maturity under timely sown and days to heading, number of grains per spike and accelerated ageing (72 h) under late sown contributed maximum towards divergence. The contribution of various characters towards the expression of genetic divergence should be taken into consideration as a criterion for choosing parents for crossing programme for the improvement in such characters.
Pages: 3195-3201 | 189 Views 34 Downloads
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How to cite this article:
Suman Devi, Yogender Kumar, Vikram Singh, Rakesh Kumar, Paras. Estimation of genetic divergence in barley (Two-rowed and six-rowed) under different growing conditions. Int J Chem Stud 2019;7(5):3195-3201.
