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陆地棉(G.hirsutum 2n=52)×异常棉(G.anomalum 2n=26)F_1染色体2n=3x=39,平均染色体构型为27.84Ⅰ+5.27Ⅱ+0.18Ⅲ+0.03Ⅳ。F_1直接与陆地棉回交,得到BC_1F_1。通过2-4次回交,经多年选育,得到许多宝贵的新种质。除已选育出综合性状好,早熟、高产、高抗枯萎病(或抗枯耐黄)、优质的新品系外,并得到一些超级长绒株系,2.5%跨距长度35.1-38.6mm,强度27.0-32.8gf/tex,麦克隆值4.8-3.1,为选育超级长绒棉提供了材料。
The average chromosome configuration of F_1 chromosome was 2n = 3x = 39 and the average chromosome configuration was 27.84Ⅰ + 5.27Ⅱ + 0.18Ⅲ + 0.03Ⅳ in G.hirsutum 2n = 52 × G.anomalum 2n = 26. F_1 Backcross directly with upland cotton, get BC_1F_1. After 2-4 backcrosses, after many years breeding, get many valuable new germplasm. In addition to the new lines of good quality, precocious, high yield, high resistance to Fusarium wilt (or resistance to yellowing) and high quality, we have obtained some super-long velvet lines with 2.5% span length of 35.1-38.6mm, 27.0-32.8 gf / tex, and McClone values of 4.8-3.1, providing materials for breeding super long staple cotton.