Comparative performance of hybrid generations reveals the potential application of F2 hybrids in upland cotton

Abstract Background The utilization of heterosis has greatly improved the productivity cotton worldwide. However, a major constraint for large-scale promotion F 1 hybrid is artificial emasculation and pollination. This study proposed potential 2 hybrids to improve upland production through comparative evaluation generations. Results Eight varieties were analyzed crosses made according NCII incomplete diallel cross-breeding design in two belts China. Variance analysis revealed significant differences agronomic, yield, fiber quality both generations environments. broad-sense heritability agronomic yield traits was relatively higher than traits. Furthermore, narrow-sense some generation belts. Overall, parental lines Zhong901, ZB, L28, Z98 observed with maximum combining ability while combinations strong special ZB × DT, L28 Z98, 851. predominant level altered trait, combination, generation, environment. Interestingly, performed outstandingly Anyang. Its lint (LY) 24.2% 11.6% that control Ruiza 816. performance SJ48 excellent Aral which showed 36.5% LY 10.9% CCRI 49. Further results most had shown low Comparatively, DT vigor multiple It feasible screen fine early In environments, correlation same trend, degree Anyang site site, opposite trend. According different plant type, associated them can be correlation. Conclusions Through variance, ability, belts, this