Journal of FARM SCIENCES, Vol 24, No 5 (2011)

Font Size:  Small  Medium  Large

Character association and path coefficient analysis among the backcross inbred lines derived from Indica x NERICA cross for productivity traits in rice (Oryza sativa L.)

Laxuman ., P.M. Salimath, H.E. Shashidhar, H.D. Mohankumar, S.S. Patil, H.M. Vamadevaiah, B.S. Janagoudar

Abstract


One hundred eighty eight back-crossed inbred lines (BILs) from Swarna x NERICA-L-20 of rice were used to study the rice grain yield and its components traits by correlation and path coefficients. Days to heading, days to 50 per cent flowering, number of productive tiller per plant, and panicle length exhibited significant positive correlation with grain yield at both phenotypic and genotypic level. Path analysis indicated that number of tillers per plant (2.559), panicle weight (0.882), days to 50% flowering (0.856), shoot length at 21 days (0.378) and spikelet fertility (0.088), had high direct effect on seed yield. It was revealed from the contribution of individual characters to the variance of yield that the contribution of characters to determination of yield was largest for number of tillers per plant, panicle weight, and finally days to 50% flowering. The study suggests that selecting varieties may base on higher tiller number, more panicles per plant, lengthy panicles, and early maturity of backcross lines.

Full Text: PDF