Vol. 9, Issue 1 (2021)
Genetic diversity and correlation studies in rice (Oryza sativa L.)
Author(s): Syed Sajid Ali, Dr. Suresh BG and Dr. GR Lavanya
Abstract: The present investigation consists of 26 germplasm used for the experiment was conducted during Kharif-2019 in Randomized Block Design with three replications at Field Experimentation Centre, Department of Genetics and Plant Breeding, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj (Allahabad). The data were recorded on thirteen quantitative characters to study genetic variability, heritability, genetic advance, correlation coefficient, path coefficient and genetic divergence. On the basis of mean performance highest grain yield per plant was exhibited by SHIATS DHAN-2 (38.4 g), followed by SHIATS DHAN-1 (38.0 g), SHIATS DHAN- 3 (37.60 g). Analysis of variance among 26 germplasm showed highly significant differences for all the characters under study indicated the presence of a substantial amount of genetic variability. Higher estimates of GCV and PCV were for higher estimates of GCV and PCV were for Spikelets per panicle followed by tillers and number of panicles. High heritability was recorded for days to maturity followed by Days to flowering 50%. High heritability coupled with high genetic advance is recorded for spikelets per panicle. Correlation study revealed that grain yield per plant showed the high positive significant association for all the characters plant height, flag leaf width, number of tillers, number of panicles, panicle length, biological yield per plant and spikeslets per panicle at both phenotypic and genotypic levels. Path coefficient analysis revealed that plant height, flag leaf width, number of panicles, panicle length, days to maturity, biological yield per hill and harvest index had positive direct effect on yield at phenotypic level for improvement of grain yield in rice. Based on the relative magnitude of D2 values, the genotypes were grouped into seven clusters by Euclidean methods of divergence study. Cluster I consist of a maximum of eight genotypes, followed by cluster II with six genotypes, cluster III with three genotypes, cluster IV with three genotypes, cluster V with two genotypes, cluster VI with one genotype, cluster VII with three genotypes. The maximum inter-cluster distance was observed between cluster VII and V followed by cluster V and IV. Thus, the genotypes from the clusters having maximum inter-cluster distance can be selected and used as parents for hybridization programme to develop desirable lines. Maximum genetic divergence was exhibited by grain yield per hill and test weight contributed to 78.77% of total divergence which is needed to be focused while selecting parents for hybridization programme.
DOI: 10.22271/chemi.2021.v9.i1am.11643
Pages: 2768-2772 | 760 Views 385 Downloads
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How to cite this article:
Syed Sajid Ali, Dr. Suresh BG, Dr. GR Lavanya. Genetic diversity and correlation studies in rice (Oryza sativa L.). Int J Chem Stud 2021;9(1):2768-2772. DOI: 10.22271/chemi.2021.v9.i1am.11643
