Analysis on Heterosis of Yield and Traits of Self-cultivated Intervarietal Crossing of Sea Island Cotton

Objective and MethodFive yield traits of 6 parents and their 15 F_1 crosses (6×6) of Sea island cotton were analyzed by the genetic model of additive-dominance effect by MINQUE(1) approaches. ResultThe results indicated that there existed highly significant additive effect on boll number, lint percentage and lint yield per plant (except for boll weight), highly significant dominance effect on boll number, boll weight and lint percentage (except for lint yield per plant ). ConclusionThere was a significant positive super-parant heterosis in the average genetic performance of boll number and lint percentage, but there was no positive population advantage in the yield of boll weight and lint percentage per plant.