| Abstrakt: |
Genetic variability is crucial in improving crops like rice (Oryza sativa L.), focusing on enhancing yield and nutritional quality. In this study 54 rice genotypes were evaluated for phenotypic and genetic variability, heritability, genetic advance, correlations, direct and indirect effects, and genetic diversity on yield attributing traits, yield, and bran oil character. Results showed that traits like flag leaf length, flag leaf width, total number of spikelets, total number of fertile spikelets, test weight, rice bran oil (RBO) percentage, and single plant yield exhibited high values for PCV,GCV, h2,GAM exhibiting its potential for selection in breeding programmes. Correlation studies indicated negative correlation of rice bran oil % with flag leaf length (r = -0.34) which was further confirmed in path analysis where flag leaf length(-0.15) and rice bran oil %(-0.12) had a negative direct effect on single plant yield. Diversity analysis using Mahalanobis's D² categorized the genotypes into 22 distinct groups, highlighting significant genetic diversity. According to the analysis, rice bran oil percentage contributed the most to genetic divergence (37.09%), followed by grain length (22.42%) and test weight (20.07%). This study offers crucial insights for future breeding strategies targeting improved yield and nutritional quality, particularly emphasizing bran oil content and other essential traits. [ABSTRACT FROM AUTHOR] |
