ESTIMATION OF SESAME YIELD AND ITS COMPONENT BASED ON TRIALLEL ANALYSIS
Abstract
The main objective of this investigation was to give information on additive and non-additive (dominance and epistasis) gene actions for seed yield and its component. This information is very essential for deciding the effective selection method to be used in manipulating of segregation generations. Five parents were crossed in a triallel analysis mating design to obtain 30 three-way cross hybrids. Results revealed that the parents had pronounced variance than crosses for plant height, length of fruiting zone, number of branches/pl. and length of capsule. Meanwhile, the crosses had wider variance than parents for number of capsules/pl., seed yield/pl. and oil percentage. The parents had pronounced variance than crosses for plant height, length of fruiting zone, number of branches/pl. and length of capsule. Meanwhile, the crosses had wider variance than parents for number of capsules/pl., seed yield/pl. and oil percentage. Two line-specific effects of first and second kind as well as three line specific effects were significant for seed yield / pl. and oil percent, thus suggesting the major role of all the three types of epistatic components viz., additive x additive, additive x dominance, dominance x dominance, besides additive and dominance gene action in expression of these traits. The P4 and P5 could be utilized as grand-parents and immediately parent which showed good general combining ability of first kind (hi) and second kind (gi) for seed yield/ plant and number of capsules/plant. Whereas, (P1) recorded positively and highly significantly general line effects of both first kind (hi) and second kind (gi) for plant height and length of fruiting zone. (P4XP5XP1) showed superior per se and significantly superior tijk effects for yield/plant, number of capsules/plant and oil percent.References
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