陆地棉×亚洲棉F_0成胚频数与亲本主要产量性状配合力的关系

陆地棉×亚洲棉F_0成胚频数主要受母本陆地棉的影响,不同的7个陆地棉品种间存在着显著差异.成胚频数高的6901和朝阳1号,单铃子棉重、单铃种子数、子指一般配合力亦均高;而成胚频数低的6913和黑山棉,上述各性状的一般配合力也均低.在7个父本亚洲棉中,与陆地棉杂交当代成胚频数高的束鹿白花和完紫,其子指的一般配合力也较高.因此,选择单铃子棉重、单铃种子数、子指一般配合力较高的陆地棉作母本与子指一般配合力较高的亚洲棉作父本杂交,可以显著提高种间杂交当代的成胚频数.

Relationship Between the Rate of Embryo Formation in F_0 of Upland Cotton x Asiatic Cotton and the Combining Ability of Yield Characters of Parents

Rate of embryo formation in Gossypium hirsutum L. (2n = 4x = 52) x G. arboreum L.(2n = 2x = 26)F0 generation is mainly affected by female parent, G. hirsutum. There is significant difference among the varieties. 6901 and Chaoyang No. 1, have high embryo formation rate and high general combining ability in weight of unginned cotton per bell, number of seed per bell and seed index, But 6913 and Heishan cotton, which have low embryo formation rate, have low general combining ability in above traits, too. Among the 7 varieties of G. arboreum we used, Shulu-baihua and Wanzi have high embryo formation rate and high general combining ability in seed index. So it can greatly increase the embryo formation rate in interspecies crossing, using G. hirsutum variety as female parent, which has high general combining ability in weight of unginned cotton per bell, number of seed per bell and seed index, and G. arboreum variety as male parent, which has high general combining ability in seed index.