In this study, fifty rice germplasm accessions were used along with five checks, namely Dagad deshi, RRF-127, RRF-140, DRR Dhan 42 and MTU 1010, for evaluating genetic variability, heritability and genetic advance. The study was conducted at Germplasm section, Indira Gandhi Krishi Vishwavidyalaya, Raipur during kharif 2022. The findings of the analysis of variance revealed extremely large genotype differences for each of the 19 quantitative characteristics under investigation. High PCV and GCV values were observed for number of effective tillers per plant, number of filled grains per panicle, number of unfilled grains per panicle, grain yield per plant, biological yield per plant and harvest index. Heritability values were found to be high for all the characters. High heritability with high genetic advance shown by characters such as days to 50% flowering, plant height, number of effective tillers per plant, number of filled grains per panicle, 100 seed weight, flag leaf length, flag leaf breadth, grain yield per plant, biological yield per plant, harvest index, paddy breadth, paddy L/B ratio and brown rice L/B ratio. This suggested that the inheritance of these features was impacted by additive gene activity, indicating additive gene action.

Rice, PCV, GCV, heritability, germplasm accessions and genetic advance

The results of the analysis of variance showed that there were extremely significant genotype differences for each of the quantitative traits. In the study of PCV and GCV, number of effective tillers per plant, number of filled and unfilled grains per panicle, grain yield per plant, biological yield per plant, and harvest index are characteristics with high PCV and GCV values. High heritability with high genetic advance shown by characters such as days to 50% flowering, plant height, number of effective tillers per plant, number of filled grains per panicle, number of effective tillers per plant, 100 seed weight, flag leaf length, flag leaf breadth, grain yield per plant, biological yield per plant, harvest index, paddy breadth, paddy L/B ratio and brown rice L/B ratio. The study showed an additive gene effect for the above characters.

Kurada Satya Rama Harika, Deepak Gauraha and Abhinav Sao (2023). Genetic Divergence and Character Association Studies on Germplasm Accessions of Rice (Oryza Sativa L.). Biological Forum – An International Journal, 15(8): 237-243.