17 A. Rasheed M. Ashfaq M. Sajjad Journal of Animal and Plant Sciences JAPS 20202020/11/09 31 3 764-772 1018-7081 https://doi.org/10.36899/JAPS.2021.3.0266 <p>Experiment was conducted to study combining ability and heterosis for major yield traits namely days to 50% flowering (DF50), growth duration (GD), plant height (PH), effective panicles per plant (EP/Pl), panicle length (PL), grains per panicle (G/P), filled grains/panicle (FG/P), seed setting rate (SSR), 1000-grains weight (TGW), grain yield/plot ( GY/plot), grain yield/hectare (GY/ha). From Griffing&rsquo;s analysis maximum general combining ability was found in L-203, CB-15 and CB-42 for PL, SSR, PH and G/P. The maximum specific combining ability was found in L-203 &times; CB-42 for PH, L-203 &times; Jasmine-85 for G/P, FG/P and CB-15 &times; CB-40 for GY/ha. The results revealed that for hybrid breeding, maximum heterosis could be exploited in crosses &lsquo;Jasmine-85 &times; CB-42&rsquo;, &lsquo;CB-15 &times; CB-42&rsquo; and &lsquo;Jasmine-85 &times; CB-15&rsquo; for major yield related traits. Taken together the results suggested potential use of the parents/crosses used herein for breeding commercial hybrid rice varieties as well as for the enhancement of the germplasm resources.</p> Rice, Combining Ability, Heterosis, Traits, Diallel, Hybridization Pakistan Agricultural Scientists Forum https://thejaps.org.pk/AbstractView.aspx?mid=AG-20-0053