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Studies on character association and selection indices for grain yield and its components in F4 generation of barley (Hordeum vulgare l.)

KrishiKosh

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Title Studies on character association and selection indices for grain yield and its components in F4 generation of barley (Hordeum vulgare l.)
 
Creator Mawati, Ramjan Khan
 
Contributor Singh, A.K.
 
Subject PLANT BREEDING & GENETICS
 
Description Abstract
The 24 genotypes of barley were studied for variability, correlation, path analysis and selection indices for yield and yield component traits. The experiment was laid out at JNKVV College Farm, College of Agriculture Rewa during rabi 2013-2014.Genotypes were evaluated using a randomized complete block design with four replications. Observation on days to 50% heading, days to maturity, plant height, number of tillers per plant, spike length, grains per spike, 1000 grain weight, biological yield per plant, harvest index and grain yield per plant were recorded. Analysis of variance showed sufficient amount of variability in the entire gene pool for all traits studied.
The comparison of mean performance of F4 population of 24 crosses of barley for 12 traits using least significant differences revealed very high variability in the population. On the result of per se performance the crosses viz., JB284 X PL751, RD2581 X JB1, JB1 X NDB1276, RD2503 X JB58 and K792 X BH674 were identified as best produced highest grain yield per plant and significantly out yielded than the general mean.
High phenotypic and genotypic variances were observed for the characters viz., days to 50% heading, plant height, grains per spike and biological yield per plant. Whereas, moderate values for grain yield per plant and remaining traits had the low values of genotypic and phenotypic variances.
The higher magnitudes of PCV were recorded for grain yield per plant followed by tillers per plant. While, characters viz., flag leaf area, upper leaf area, grains per spike, biological yield per plant. In general, the higher magnitude of GCV and PCV were recorded for grain yield per plant and tillers per plant, suggesting sufficient variability and thus offer scope for genetic improvement through selection for these traits.
High estimates of heritability was observed for days to maturity, plant height, grains per spike , biological yield per plant, 1000 grain weight, grain yield per plant. High heritability along with high genetic advance as percent of mean was registered for grains per spike, biological yield per plant, 1000 grain weight and grain yield per plant.
At phenotypic level, the grain yield per plant exhibited highly significant and positive correlation with spike length, grains per spike, biological yield per plant and 1000 grain weight.
Path coefficient analysis at phenotypic level revealed that biological yield per plant registered the maximum positive direct effect on grain yield per plant followed by harvest index, days to maturity, flag leaf area and plant height.
Sequential and simultaneous selection indices revealed that out of twenty four genotypes, 14 genotypes were sorted out for their suitability for higher grain yield based on linear combination of yield components. The result revealed that among the tested genotypes K792 X BH674, JB284 X PL751, JB1 X NDB1276, K792 X NDB1276, RD2668 X K792, RD2581 X JB1 and RD2503 X JB58 had the genetic potential for grain yield.
 
Date 2016-07-28T11:40:18Z
2016-07-28T11:40:18Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/70121
 
Language en
 
Format application/pdf
 
Publisher JNKVV