Character association and genetic diversity in barley (Hordeum vulgare L.)
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Date
2016
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Publisher
CCSHAU
Abstract
The present investigation was carried out during Rabi, 2014-15 at Research farm of Wheat
and Barley section, Department of Genetics & Plant Breeding, Chaudhary Charan Singh Haryana
Agricultural University, Hisar. The experiment was conducted to evaluate one hundred seventy barley
germplasm lines (101 two rowed and 69 six rowed) and three standard check varieties (BH393 &
BH946 six rowed and BH885 two rowed) in Augmented Block Design. The analysis of variance
indicated significant difference (p<0.05) among entries (ignoring blocks), checks, varieties and checks
v/s varieties for all quantitative characters except harvest index in the case of checks. The mean squares
due to blocks were non-significant for all the characters under study. The high magnitude of PCV along
with GCV was observed for number of tillers per plant, followed by peduncle extrusion length. Grain
yield per plant exhibited strong positive association with biological yield/plant, number of grains/spike,
number of tillers/plant and 1000 seed weight for both the two rowed as well as six rowed barley
genotypes. Path coefficient analysis revealed that all the characters have direct and positive association
with grain yield/plant except peduncle extrusion length which had negative direct effect in case of two
rowed barley. While for the six rowed barley, the characters viz. biological yield/plant, harvest index,
number of tillers/plant, days to 75% flowering and peduncle extrusion length have positive direct
effects on grain yield/plant. The non-hierarchical Euclidean cluster analysis grouped the genotypes
including checks into eleven distinct clusters for two rowed barley genotypes and nine clusters for six
rowed barley genotypes. This indicated existence of high degree of genetic diversity in the genotypes
evaluated. The clusters formed in divergence analysis contained genotypes of heterogeneous origin
thereby indicating no parallelism between genetic and geographic diversity. The highest intra-cluster
distance was recorded for cluster XI in two rowed barley and for cluster I in six rowed barley, which
indicates the existence of maximum variability within the clusters. The lowest intra-cluster distance
value was recorded for cluster V in two rowed while for the cluster VI in six rowed barley.
Description
Keywords
Selection, Placement, Costs, Manpower, Processed products, Topping, Adaptation, Technological changes, Self help, Productivity