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CHARACTER ASSOCIATION AND PATH COEFFICIENT ANALYSIS OF GRAIN YIELD AND YIELD RELATED TRAITS IN SOME PROMISING EARLY TO MEDIUM DURATION RICE ADVANCED LINES (Pages : 8 - 12)

M.A. ISLAM, S.A. RAFFI, M.A. HOSSAIN AND A.K. HASAN

Evaluation of advanced lines is an important step in any crop improvement program. A field experiment was conducted using twenty three rice genotypes including three check varieties during the period from June to December 2013 at the Agronomy Field Laboratory, Department of Agronomy, Bangladesh Agricultural University, Mymensingh to investigate the association among eight morpho-physiological traits including yield. The experiment was laid out in a randomized complete block design with three replications. Grain yield was found to be positively and significantly correlated with filled grain per panicle, plant height, days to 50% flowering and days to maturity both at genotypic and phenotypic levels, indicating the importance of these traits for yield improvement in rice. From the path coefficient analysis, it was revealed that days to maturity, days to 50% flowering, plant height, number of filled grain per panicle and grain length had direct positive effect on yield, indicating these are the main contributors to yield. Eventually, it was recommended that, for obtaining increased rice yield, a genotype should possess more number of filled grains per panicle.Download


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