棉 花 学 报 Cotton Science 2007，19(2)：114-118
Analysis on Genetic Contribution of Yield Components to Lint Yield in Upland Cotton (Gossypium hirsutum L.) Abstract：The genetic contribution of 6 yield component traits to lint yield were conducted using additive-dominance-maternal genetic model (ADM model)，which considered genotype×environment interaction effects (GE) with estimating conditional and unconditional variance component and genetic effects in F1 intraspecific ( Gossypium hirsutum L.) hybrids of (5×5) complete diallel cross for 2 years. Results showed that there were phenotype contribution from yield component traits to lint yield (contribution ratios range-46%～80%). Boll number had very high dominance contribution ratios on lint yield（CRD=96%），and followed by that of boll weight（CRD=41%）. Boll number had largest maternal×environment interaction contribution ratio on lint yield（CRME=98%），and followed by those of boll weight（CRME=77%），lint index（ CRME=62%）and kernel index（CRME=42%）. Any individual parents could have the different contributions of additive and maternal effects from boll number on lint yield. Any individual parent could have the most contributions of maternal×environment interaction effects due to yield component traits on lint yield，which could result from the fact that the parent had its own genetic and developmental characterization. In environment 1，parent 1 had largest maternal× environment interaction effects contribution from boll weight to lint yield (MEi(C→T)=5.49g). In environment 2，parent 3 had largest maternal×environment interaction effects contribution from boll weight to lint yield(MEi(C → T)=0.51g). The dominance effects of lint yield were mainly influenced by boll number and boll weight for many crosses，therefore boll number and boll weight could serve as measurement to select indirectly the crosses having high dominance effects of lint yield. |