抗草甘膦棉花杂交组合筛选及优势分析

Screening and Advantage Analysis Cross Combination of Glyphosate-resistant Cotton

[目的]进行抗草甘膦棉花杂交组合筛选及优势分析。[方法]以2个抗草甘膦棉材料为母本,纤维品质优异的品系为父本配置的杂交组合进行杂种优势和综合性状研究。[结果]4个抗草甘膦杂交组合籽棉和皮棉产量具有明显的正向杂种优势,产量构成因素中单株结铃数具有正向中亲优势、正向超亲和正向竞争优势,铃重具有正向中亲优势、正向竞争优势和负向超亲优势,衣分表现负向中亲、负向超亲优势和正向竞争优势。果枝高度、纤维品质多数指标均表现正向超中亲优势和正向竞争优势,株高、果枝节位、籽指、霜前花率均表现负向中亲优势和负向竞争优势。筛选出籽棉竞争优势9.75%、皮棉竞争优势13.05%综合性状优良的抗草甘膦杂交棉组合。[结论]该研究为培育高优势优质抗草甘膦除草剂杂交组合,并将其应用于生产提供参考和依据。

[Objective]To carry out screening and advantage analysis cross combination of glyphosate-resistant cotton.[Method]With two anti-glyphosate cotton material as the female parent,and varieties having good fiber quality as the male parent,we carried out research on hybrid vigour and comprehensive characters of the cross combination.[Result]The unginned cottonand lint cotton yields of four combinations showed significant positive heterosis.Among the yield component factors,bolls per plant showed positive mid-parent heterosis,positive over-parent heterosis and positive competitive advantage.Boll weight had positive mid-parent heterosis,positive competitive advantage and negative over-parent heterosis.ginning outturn showed negative mid-parent heterosis,negativeover-parent heterosis and positive competitive advantage.Branch height,fiber quality and other indexes showed positive over-parent heterosis and positive competitive advantage.Plant height,node order of fruit branch,seed index and flower rate before frost showed nagetive mid-parent heterosis and positive competitive advantage.Cross combination of glyphosate-resistant cotton was screened out with competitive advantages of screened seed cotton being 9.75%and 13.05%.[Conclusion]This research provided references and basis for the application of high-quality cross combination in production.