GENETIC
VARIABILITY CORRELATION AND PATH ANALYSIS IN
RICE
(Oryza sativa L.)
S. P. Chakma,
H. Huq*, F. Mahmud and F. Khatun
*Corresponding author; Email: muna_sau@yahoo.com
Abstract
The
experiment was conducted at the experimental field of Sher-e-Bangla
Agricultural University, Dhaka during January to June of 2011. The experiment
was intended to estimate the nature and magnitude of genetic variability,
correlation and path coefficient of 39 rice genotypes collected from Bangladesh
Rice Research Institute, Lal Teer Seed Ltd. and Chittagong Hill Tracts. All the
characters tested showed significant variations among the genotypes. High
genotypic coefficient of variation was observed for grain yield and number of
unfilled grains per panicle. High heritability coupled with high genetic
advance in percent of mean was observed in grain yield, harvest index,
1000-grains weight, unfilled grains per panicle, secondary branches number and
plant height indicating additive gene control on the expression of these
characters and that selection based on these characters might be effective. The
significant positive correlations were recorded for number of effective tillers
per plant, 1000-grains weight and harvest index with grain yield at both
genotypic and phenotypic levels indicating that the improvement of these
characters would lead to increase in grain yield. The highest positive direct
effect on grain yield for harvest index followed by number of filled grains
indicated that the direct selection based on these characters would be
effective for yield improvement.
Key words: Rice, Genetic variability, Correlation and
Path analysis.
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Return Volume: Journal of Experimental Biosciences 5(2): July 2014
