Abstract: Yield and fiber quality traits of 10 parents and their 24 F1 transgenic crosses（6×4）in 3 ecological environments were analyzed by the genetic model of additive-dominance and their interactions with environments by MINQUE method. The result showed that bollsize, lint percentage, lint yield, elongation, 2.5% span length, strength and micronaire were mainly controlled by genetic main effects, and seed cotton yield, boll number and micronaire were evidently affected by environmental effects. Among these genetic main effects, dominant effect values in 4 yield traits were more than additive effect value, except boll size, and 5 fiber quality traits showed contrary effect, these indicated more yield traits exhibited heterosis. Hpm (population heterosis over parent mean), Hpb(population heterosis over parent better) and environment interaction showed lint yield and lint percentage had a better stability, and worse stability displayed in seed cotton yield and boll number. Interaction effect values between yield traits and environment were higher, and lower between fiber quality traits and environment, revealed fiber quality traits can be improved through selection in certain environment, and yield trait should be improved in different ecological environment. The genotype value and heterosis of every F1 cross lint yield analysis showed that crosses P6×P10 exhibited remarkable Hbm and Hbp.

Key words: insect resistant crosses, yield and quality traits, genetic effect, heterosis