Abstract
Twenty five rice genotypes were used to study the genetic components, correlation and path coefficients during Aman season of 2011. Thirteen characters were studied to find out the suitable traits for the improvement of rice yield. Among these characters considerable correlation were observed. Correlation values of grain yield per square meter with plant height, number of tillers per hill, number of panicles per hill, panicle length, number of primary branches, number of filled grain per panicle, spikelet sterility (%), 1000 grain weight and days to flowering revealed that selection based on this traits could significantly be improved the grain yield of rice. Number of tillers per hill, number of panicles per hill, panicle length, number of filled grains per panicle, 1000-grain weight exhibited high direct effect coupled with significant positive correlation on grain yield indicating selection on the basis of these traits would enhanced yield potentiality of rice. The residual effect was found 0.179 which indicated that 82.10% of the variability was accounted for 13 yield and yield contributing traits included in the present study. Rest 17.90% variability might be controlled by other yield contributed traits that was not included in the present investigation. So direct selection based on these traits would be effective for improvement of these F4 materials
Highlights
The quantitative characters are the best indicators of yield
Twenty five F4 generation materials (Table 1) developed previously from 8 × 8 diallel cross were grown in randomized complete block design (RCBD) with three replications during T
Correlation with 1000-grain weight, and days to flowering with spikelet sterility was negatively significant at genotypic level. 1000grain weight showed positive association with days to flowering and days to maturity
Summary
The quantitative characters are the best indicators of yield. Yield is a complex character, which is effected by a number of its component characters and the environment, where it is grown. Spikelet sterility (%) and days to flowering showed significant negative correlation coefficient with grain yield at both genotypic and phenotypic level.
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