Association analysis of some yield influencing traits in aromatic and non aromatic rice.

摘要

Studies on path coefficient analysis for yield and yield components in rice, involving 9 genotypes of aromatic group and 8 genotypes of non-aromatic group were conducted separately in Faisalabad, Pakistan, during 2001-02. Broad sense heritability estimates for various traits ranged from 56 to 89 in the non-aromatic group and 46 to 99 in the aromatic group. In both groups, the phenotypic coefficients of variability were higher than their respective genotypic coefficients of variability for all the traits, indicating the effect of the environment on character association. In the non-aromatic group, productive tillers per hill showed highly significant positive association with grain yield per plant. In the aromatic group, days to 50 flowering and days to maturity exhibited highly significant negative genetic association with grain yield per plant. Association and path analysis suggested that productive tillers per hill, days to maturity and days to 50 flowering may be considered important for the improvement of grain yield in the non-aromatic group whereas productive tillers per hill, spikelets per panicle, fertility percentage and plant height may be considered as the selection criteria for the direct improvement of grain yield in the aromatic group..