GENETIC DIVERGENCE STUDIES ON YIELD AND YIELD ATTRIBUTING TRAITS IN RICE (Oryza sativa L.)

M. SRINIVASA RAO¹*, M. SUBBA RAO², M. LAL AHAMED³, P. RAMESH BABU^4
1Department of Genetics and Plant Breeding, Agricultural College, Naira, Acharya N. G. Ranga Agricultural University (ANGRAU), Lam, Guntur, 522034, India
²Regional Agricultural Research Station, Nandyal, 518501, Acharya N. G. Ranga Agricultural University (ANGRAU), Lam, Guntur, 522034, Andhra Pradesh, India
³Agricultural College, Bapatla, 522101, Acharya N. G. Ranga Agricultural University (ANGRAU), Lam, Guntur, 522034, Andhra Pradesh, India
⁴Agricultural Research Station, Nellore, 532185, Acharya N. G. Ranga Agricultural University (ANGRAU), Lam, Guntur, 522034, Andhra Pradesh, India
* Corresponding Author : msr0376@gmail.com

Received : 02-10-2020     Accepted : 22-10-2020     Published : 30-10-2020
Volume : 12     Issue : 10       Pages : 776 - 778
Genetics 12.10 (2020):776-778

Keywords : Rice, D2analysis, Principal component analysis
Academic Editor : Prof Dr Suleyman Cylek
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Agricultural Research Station, Nellore, 532185, Acharya N. G. Ranga Agricultural University (ANGRAU), Lam, Guntur, 522034, Andhra Pradesh, India for providing of land to conduct Experimental trials
Author Contribution : All authors equally contributed

Fifty-eight genotypes of rice were studied for genetic diversity on the basis of yield and its attributing traits. Based on D2 analysis, 58 rice genotypes were grouped into eight clusters. Cluster II consisted maximum of 16 genotypes followed by cluster III with 11 genotypes. Among different traits, test weight followed by days to 50% flowering, filled grains per panicle and plant height had maximum contribution towards the total divergence. PCA identified four components with eigen value more than one which contributed 85.028 percent of cumulative variance. Divergence studies indicated that selection for hybridization should be more based on genetic diversity rather than the geographical diversity

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