陆海BC_4F_3和BC_4F_(3:4)代换系纤维产量与品质的表型评价

对陆海BC4F3和BC4F3:4代换系群体的纤维产量与品质的表型性状进行初步评价分析,结果表明,群体代换系各性状平均值与轮回亲本中棉所45相近,但群体内部个体间仍存在丰富的遗传变异,其中不乏超越中棉所45的材料。从中筛选20个纤维品质突出单株(株行),2年的上半部平均长度高于30.00 mm,断裂比强度高于31.0 c N/tex,表现较好的一致性和稳定性,为进一步棉花纤维品质育种提供了选择材料。

Evaluation of Fiber Yield and Quality Traits of Chromosome Segment Substitution Lines Population (BC4F3 and BC4F3:4) in Cotton

Two generations(BC4F3 and BC4F3:4) of chromosome segment substitution lines (CSSLs), which were derived from a cross of CCRI45 (Gossypium hirsutum L. ) as the recipient parent and Hai 1 (Gossypium barbadense L.) as the donor parent, were used to evaluate the phenotypic traits related to fiber yield and quality . The results showed that the average value of all traits in two generations were near to those of recurrent parent CCRI 45, but there were still abundant genetic variation among the individuals, and some of them had better yield and fiber quality than CCRI45, in which 20lines showed stability for fiber length with above 30.00 mm and fiber strength with above 31.0 cN/tex. These CSSLs with excellent trait genes from G. barbadense could further be used for cotton quality breeding.