Vol. 5, Issue 2 (2017)
Studies on genetic variability, heritability, genetic advance for yield and quality attributes in exotic and indigenous rice germplasm lines of rice (Oryza sativa L.)
Author(s): Sanjay Kumar Singh and Mukesh Kumar Sharma
Abstract: The present study was conducted at the Seed Breeding Farm, Department of Plant Breeding and Genetics, College of Agriculture, J.N.K.V.V., Jabalpur, during Kharif 2013, to assess genetic variability, heritability, and trait associations and direct and indirect effects of yield attributes in 110 rice germplasm lines using a randomized complete block design with three replications. Analysis of variance revealed highly significant differences among genotypes for all traits, indicating substantial genetic variation. The highest variability was recorded for the number of spikelets per panicle, while grain breadth exhibited the least variation. The phenotypic coefficient of variation (PCV) was higher than the genotypic coefficient of variation (GCV) for all traits, with only slight differences between them, suggesting minimal environmental influence on trait expression. High heritability estimates coupled with high genetic advance as a percentage of mean were observed for plant height, culm length, total and productive tillers per plant, plant weight, average panicle weight, total spikelets per panicle, filled and unfilled spikelets per panicle, spikelet density, 1000-grain weight, grain yield per plant, biological yield per plant, harvest index, and panicle index. These traits are primarily governed by additive gene action and can be effectively improved through selection. These traits should be prioritized in selection strategies for genetic enhancement of grain yield in rice. The findings provide valuable insights for developing high-yielding rice genotypes through targeted breeding approaches.
Pages: 552-555 | 72 Views 34 Downloads
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How to cite this article:
Sanjay Kumar Singh, Mukesh Kumar Sharma. Studies on genetic variability, heritability, genetic advance for yield and quality attributes in exotic and indigenous rice germplasm lines of rice (Oryza sativa L.). Int J Chem Stud 2017;5(2):552-555.
