Advances in Applied Agricultural Sciences 2 (2014); 12: 73-80
Association Analysis of Yield and Fiber Traits in Advance Pakistani Upland Cotton Cultivars (Gossypium hirsutum L.)
Abdul Wahid Baloch 1*, Javed Hussain Sahito 1, M. Ali 1, Ghulam Asghar Baloch 2, Saifullah Abro 3, Siraj Ahmed Channa 1,Abdul Majeed Baloch 1, Ghulam Hussain Baloch and Gul Muhammad Baloch 1
1 Sindh Agriculture University, Tandojam, Pakistan. 2 Agriculture Research Institute, Quetta, Pakistan. 3 Nuclear Institute of Agriculture, Tandojam, Pakistan.
The present study was conducted to estimate correlation and regression between yield and fiber characters in eight commercially grown cultivars of cotton genotypes during kharif 2012. The mean squares from analysis of variance showed that genotypes differed significantly for majority of the traits studied. This shows the presence of genetic variability for various major characters in the studied materials. The correlation coefficient (r) indicated that sympodial branches plant-1(bolls plant-1 and boll weight were significantly and positively correlated with seed cotton yield plant-1. The higher correlations coefficients of yield components with seed cotton yield also suggested that yield components can reliably be used as indirect selection criteria to improve seed cotton yield plant-1. However, negatively significant correlation was found between micronaire value and seed cotton yield plant-1, suggesting that care must be given to micronaire value while seed cotton yield is being improved. The regression coefficient (b) revealed that a unit increase in monopodial branches plant-1, sympodial branches plant-1, bolls plant-1 and boll weight caused a substantial increase in seed cotton yield plant-1. The coefficient of determination (r2) further suggested that larger portion of total variability in seed cotton yield plant-1 was attributable to traits such as sympodial branches plant-1, bolls plant-1 and boll weight. Correlation and regression coefficient analysis suggested that sympodial branches plant-1 and bolls plant-1 were the most important yield components traits and could be exploited as selection criteria for further improvement of cotton genotypes.
Keywords: Correlation analysis, Fiber and yield traits, Upland cotton