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Genetic variability and character association among biometrical traits in F2 generation of some Rice crosses
oleh: B.C. Nandeshwar*, S.Pal, B.K. Senapati and D.K. De
Format: | Article |
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Diterbitkan: | Indian Society of Plant Breeders 2010-07-01 |
Deskripsi
Twenty five F2 progenies derived from the crosses involving HYV s and quality rices were evaluated during kharif 2005.Eleven biometrical characters were studied for estimating phenotypic variance, genotypic variance, genotypic coefficient ofvariation (GCV), phenotypic coefficient of variation (PCV), genetic advance, heritability (Broad sense), correlation coefficientand path coefficient among themselves. The analysis of variation revealed significant differences in the genotypes for all thecharacters studied. Per se performance of the progenies revealed that two F2 progenies derived from the crosses IR-62 x SambaMashuri and Kunti x Dudheswar were promising in respect of grain yield and some yield related traits. High GCV and PCVwere observed for grain yield plant -1, panicle number plant -1 and panicle weight. High heritability was observed against all thecharacters studied excepting panicle weight, grain number panicle -1 and grain breadth. Grain yield plant -1showed maximumgenetic advance as percentage of mean followed by panicle number plant -1, plant height and panicle weight respectively. Grainyield plant -1 possessed significant positive correlation with panicle number plant -1, panicle weight and grain number panicle -1while it had significant negative correlation with plant height. Panicle number plant -1 imparted maximum direct effect on grainyield followed by grain number panicle -1, 1000 grain weight and panicle length in this regard.