GENETIC VARIATION FOR YIELD AND QUALITY CHARACTERS IN MUTANTS OF AROMATIC RICE

摘要

Twenty promising mutants of Pusa Basmati-1 were studied for genetic parameters in respect to different yield and quality characters. The mutants showed significant variation for all the characters studied. The maximum phenotypic and genotypic variances were recorded for gel consistency, head rice recovery, plants height, grains panicle~(-1) and water uptake number. The high values of GCV and PCV for chalkiness of endorsperm, head rice recovery, aroma, alkali digestion value and gel consistency suggest that there is a possibility of improving these characters through direct selection. Most of the yield and quality characters showed higher heritability indicating better scope for selection. The high heritability with high genetic advance as percent ofmean is more useful than heritability alone for predicting the gain in selection. In the present investigation, characters viz., chalkiness of endosperm, head rice recovery, alkali digestion value, gel consistency, number of panicles~(-1) and 100-grainweight exhibited high heritability with high genetic advance indicating the preponderance of additive gene action, and such characters could be improved through selection.