Yadunandan Verma and Dr. NS Tomar
The entitled research work “Assessment of genetic variability, correlation and path coefficient analysis for yield & its contributing traits in rice (Oryza sativa L.)” was executed Research cum Intractional Farm, Genetics and Plant Breeding department of IGKV Raipur (C.G.) during kharif 2021. The research material under research comprised of 50 rice germplasm lines including two checks namely Mahamaya and Rajeshwari, which were tested in RBD with two replications with the objectives viz. (1) To estimate genetic variability for yield and quality traits. (2) To study the association analysis among yield and other traits. (3) To analyse the direct and indirect effects on trait under study on grain yield. The observation of research investigation were recorded for total 24 characters viz. Days to 50% flowering, Number of tillers per plant, Panicle length (cm), Plant height (cm), 1000seed weight (g), Grain yield per plant (g), Biological yield per plant(g), Harvest index(%), Paddy length(mm), Paddy breadth(mm), Paddy length breadth ratio, Hulling (%), Milling (%), Alkali spread value, Gel consistency (mm), Amylase content (%), Kernel length (mm), Kernel breadth (mm), Kernel length breadth ratio, Hulled rice length after cooking (mm), Hulled rice breadth after cooking(mm), Cooked rice length (mm), Cooked rice breadth (mm). The analysis of variance showed that there was a highly significant variation in genotypes for all of the studied characters. A small difference between PCV and GCV suggests that the environment has little impact on the concerning traits. The NTPP, TSW, GYPP, BYPP, HI, M, HRR, ASV, GC, AC, KL: B, HRBAC, CRL and CRB had high heritability along with high genetic advance as a percent of mean indicates that the heritability is most likely caused by additive gene action and selection may be effective. Positive significant correlation was showed GYPP with NTPP, TSW, BYPP and HRR with H, M. These characters would be beneficial for increasing yield and choosing superior genotypes among rice cultivars. Positive direct effect on GYPP showed by the HI, BYPP, PLN, DTFF, NTPP, TSW and on HRR showed by PL, M, ASV, GC, KB, KL:B, HRABC, CRL revealed true relationship between them and direct selection for these traits would be beneficial for increasing yield.
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