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利用主基因与多基因混合遗传模型联合分析方法 ,通过纤维强度不同的 5个亲本配制的 8个组合 ,研究了棉花主要纤维品质性状的遗传。联合分析发现 ,在不同性状不同组配方式的 14个组合中 ,有 12个存在主基因 ,表明了纤维性状主基因存在的普遍性 ,以F2∶3 家系的预测效果最好 ;双亲纤维品质性状均存在较大差异的组合——— 72 35×TM1F2 代强度主基因的遗传率为 0 .196 ,麦克隆值为 0 .32 0 ,长度为 0 .139,回交世代的主基因遗传率小。除纤维长度总的显性效应为较高的正值外 ,其余各纤维性状的主基因显性与多基因显性的总和为负值或接近 0 ,杂合状态下大多数纤维品质性状表型值会偏向中亲值或低亲值 ,单纯依靠表型选择效率低。因此 ,很有必要对棉花品质性状进行分子标记辅助育种选择
The inheritance of major fiber quality traits in cotton was studied by using the combination of major gene and polygene mixed genetic model and 8 combinations of 5 parents with different fiber intensities. The joint analysis showed that among 14 combinations of different combinations of different traits, 12 major genes existed, indicating the universality of the major genes in the fiber traits. The F2: 3 pedigree had the best prediction effect and the parental fiber quality traits The heritability of dominant gene of 72 35 × TM1F2 generation was 0.196, the value of micronaire was 0.32 0, and the length was 0.139. The heritability of the major genes in backcross generation was small . In addition to the total dominant effect of fiber length for the higher positive value, the rest of the fiber traits of the major gene dominant and multi-gene total sum of negative or close to 0, heterozygous most of the fiber quality traits phenotype The value will be biased in the pro-value or low progenitor, simply rely on the phenotype to select low efficiency. Therefore, it is necessary to carry out molecular marker-assisted selection of cotton quality traits