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用湘棉 1 0号和显性无腺体品系中 5655杂交 ,再以湘棉 1 0号为母本与杂交后代连续回交 3次 ,再自交 3次 ,在 BC3F4 中发现一变异单株 ,其根、茎、叶上都有腺体 ,但种子中腺体稀少 ,通过继续自交和选择 ,于 1 995年育成湘棉 1 8号。湘棉 1 8号具有植株有腺体、种子低棉酚的特性。种子棉仁的棉酚含量为 0 .0 30 4 %。 1 997～ 1 999年参加湖南省棉花品种区试。皮棉产量 1 71 8.9kg· hm-2 ,比湘棉 1 0号常规品种对照增产 1 5.81 % ,比湘杂棉 1号杂交种对照增产 6.77% ,为对照湘杂棉 2号的92 .83%。抗性鉴定表明 ,该品种高抗枯萎、耐黄萎病。大面积试种未表现鼠害。
Fifty-two crosses were made between Xiangmian No.10 and 5655 dominant dominant glandless lines, then backcrossed three times with Xiangmian No.10 as female parent and hybrid progenies, and then selfed for three times. A mutant plant was found in BC3F4 , Its roots, stems, leaves have glands, but rare in the seed glands, by continuing to self-selection and selection, in 1959 bred Xiangmian 18. Xiangmian No. 18 has the characteristics of plant glands and seeds low gossypol. Gossypol content of seed cotton kernel was 0.304%. 1 997 ~ 1 999 to participate in Hunan Province cotton varieties regional test. The yield of lint cotton was 1 71 8.9 kg · hm-2, which increased by 15.81% compared with the conventional varieties of Xiangmian 10 and increased by 6.77% compared with the hybrids of Xiangzamian 1, which was 92.83% of the control Xiangzamian 2, . Resistance identification showed that the variety is highly resistant to wilt and Verticillium wilt. Large-scale test showed no rat damage.