2 (2) 2018, APRIL,2018
Combining ability study in sunflower (Helianthus annuus L.)
Author: U. K. Singh and Dhiraj Kumar
Category: Plant breeding
The present study of combing ability in sunflower (Helianthus annuus L.) was undertaken with the objective of identifying good general combiner for yield and yield component traits. Both General combining ability (gca) and Specific combining ability (sca) variance differ significantly for all the characters. The magnitude of non-additive gene action was higher than the corresponding additive gene action for all the characters in crosses showing suitability of the material for hybrid combinations. In female parents, CMS-SS-502B, CMS-17B came out to be good general combiner for most of the yield contributing traits. CMS-SS-502B was found to be good general combiner for head diameter, 100-seed weight, volume weight, seed yield per plant and seed filling per cent. Likewise CMS-17B was also found to good general combiner for early flowering and maturity, short plant height, 100-seed weight, volume weight and seed filling per cent. Among male parents SS-502-1-1 was good general combiner for biological yield per plant, head diameter, volume weight, seed yield per plant and oil content. Similarly GAUSUF-15 was also good general combiner for early flowering and maturity, short plant height, and 100-seed weight. The crosses showing high desirable sca effect have involved either one or both the parents of high gca effect and in turn had high per se performance. The cross DSFH-4 exhibited high sca effect for seed yield and simultaneously high significant sca effect for biological yield, harvest index, plant height and seed filling percentage. Similarly DSFH-30 had high significant sca effects for seed yield, biological yield, head diameter and volume weight. Therefore, DSFH-4 and DSFH-30 were most ideal cross combinations displaying consistent high sca effect with high per se performance for seed yield and important characters.
Keywords: Combining ability, sunflower, yield, population, gene action