Combining Ability for Yield and Yield Components in Sesame Hybrid

Abstract

The study on combining ability is important information for sesame hybrid development. The objective of this study was to evaluate combining ability for yield and yield components in sesame hybrid. The pure lines were crossed in half diallel mating design. Parents and their hybrids were evaluated in randomized complete block design with three replications in the early rainy season 2017. The results showed that General Combining Ability (GCA) effect of parents were significant (P≤0.01) for almost of the traits studied, except for capsule/plant. However, Specific Combining Ability (SCA) effect of hybrids were significant for all of the characteristics studied. The parents MK60 and White UB2 had the highest GCA values and significant for yield/rai (23.72 and 17.61, respectively). The crosses CM-07 x KKU1, MK60 x Kanchanaburi and Kanchanaburi x MKS-I-84001 is appropriate for hybrid variety development. Because they had the highest yield/rai (234.27, 298.49 and 290.96 kg/rai, respectively), specific combining ability were significant (57.08, 67.74 and 88.61, respectively) and highest heterosis for this trait (87.15, 65.03 and 105.79%, respectively). Non-additive gene action were important for yield/rai, therefore the improvement for this trait can be achieved through hybrid development.