Vol. 10, Issue 9 (2021)

Author(s):
Bhanu Pratap, Shivendra Pratap Singh, Abhimanyu and Mukesh Kumar

Abstract:
The goal of the current study titled "Estimates indirect selection parameters through correlation coefficient in rice (Oryza sativa L.)" was to estimate correlation coefficient. The experimental material comprises of 104 genotypes viz; 20 lines, 4 testers and 80 crosses developed by adopting “line x tester” mating design were evaluated during Kharif, 2020. The majority of significant estimates of correlations between yield and yield components in this study were positive, indicating a highly favourable situation because selection for improving these traits individually or simultaneously would result in improvements in others due to correlated responses. Selection, it is believed, would be highly effective in enhancing yield and yield components for the development of new plant types. Grain yield per plant possessed positive and highly significant correlation with harvest index, biological yield per plant, grains per panicle, hulling percentage, kernel length after cooking, panicle length, spikelets per panicle and 1000 grain weight at both phenotypic and genotypic levels. Therefore, these characters emerged as most important associates for grain yield in rice. Days to 50% flowering showed positive and highly significant correlation with days to maturity, L/B ratio, Plant height, panicle length and kernel length after cooking whereas other characters like hulling percentage and harvest index; Days to maturity showed correlation with L/B ratio, panicle length, kernel length after cooking, plant height, harvest index and hulling percentage; Plant height showed positive and highly significant correlation with panicle length and biological yield per plant; Panicle length had highly significant positive correlation with harvest index, grain yield per plant, kernel length after cooking and hulling percentage; Spikelets per panicle showed correlation with 1000-grain weight, grains per panicle, and grain yield per plant; Grains per panicle showed highly significant and positive correlation with grain yield per plant, harvest index, 1000 grain weight and hulling percentage; 1000-grain weight exhibited significant and positive correlation with biological yield per plant; Biological yield per plant had highly significant and positive association with grain yield per plant, hulling percentage and gel consistency; Harvest index had highly significant and positive association with grain yield per plant, kernel length after cooking and hulling percentage; Hulling percentage shows highly significant and positive association with grain yield per plant; L/B ratio showed positive and highly significant correlation with kernel length after cooking and Kernel length after cooking showed positive and highly significant correlation with grain yield per plant and for gel consistency.