Correlation and path co-efficient analysis for grain quality traits in F1 generation of rice (Oryza sativa L.)

Abstract

A study on correlation and path co-efficient analysis was conducted on eleven F1 generation derived from crosses between aromatic and non-aromatic parental landraces genotypes. The results showed that high standard deviation was observed on head rice recovery (16.12) followed by gel consistence (13.81) and milling recovery (10.74). The results also showed that correlation between brown rice length and paddy grain width (r= 0.692); paddy grain length and brown grain length (r = 0.558); head rice recovery and milling recovery (r = 0.511) and brown rice shape and grain rice length (r = 0.404) were positive highly significant, while correlation between brown rice shape and brown rice length were negative (r = -0.497). These highly correlated characters could be used for indirect selection and improvement of grain rice quality. The path co-efficient analyses revealed a low direct and positive effect for paddy grain length on brown grain length (0.009). The direct effect of brown rice width (2.774) and brown grain shape (2.481) on brown grain length was high and positive showing that these characters have a direct effect and influence on brown grain length thus indicating their importance in grain rice quality improvement. Key words: Rice, correlation, path co-efficient analysis, F1 generation, quality, aroma.