Assessment of Mean Performance, Variability, Traits Association and Path Coefficient in Transplanted Aman Rice (Oryza sativa L.) Landraces
Asian Journal of Biology,
The study was conducted to estimate the mean performance, genetic parameters along with traits association and path coefficients from data collected on 48 Transplanted Aman (T. Aman) rice landraces. In mean performance, Manik Digha, Goirol, Jesso Balam, Dal Katra, Chinri Gushi, Indrasail, Sunadiga, Bad Kalamkati, Raj Mondal and Blue Stick were found as elite landraces. High heritability along with genetic advance (GA) and genetic advance in per cent of mean (GAMP) was observed for basal leaf width, plant height, culm length, filled grain/panicle, unfilled grain/panicle, days to flowering, days to maturity, test weight, grain length, grain breadth, decorticated grain length breadth ratio and yield showed high genetic advance that helped in effective and reliable selection through these characters for crop improvement. A positive and significant association was found for filled grain per panicle, days to flowering, days to maturity, grain length and decorticated grain length breadth ratio with yield/hill at both genotypic and phenotypic levels. Though days to maturity and decorticated grain length breadth ratio have a negative direct effect on yield but made the total association positive and significant. Filled grain/panicle, days to flower and grain length have a positive direct effect on yield and made the total association positive and significant. Yield had significant (***p<0.001) positive correlations with filled grains number per panicle, days to flowering, days to maturity, grain length, and decorticated grain length breadth ratio. Hence, basal leaf width, plant height, culm length, filled grain/panicle, unfilled grain/panicle, days to flower, days to maturity, test weight, grain length, grain breadth, decorticated grain length breadth ratio and yield are identified as key traits for developing high yielding rice breeding lines.
- traits association
- path coefficient
- rice landrace
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