无数的生产实践和研究证明:生物体的杂交,即使父母本差异很微小,对後代的生长发育也是有利的,此即所谓杂种优势.杂种优势所表现的程度,决定杂交亲本间的血缘远近.一般说来,品种间杂种比自花授粉的後代生活力强,种间杂种又强于品种间杂种.新疆地区不少试验研究机构,对陆地棉与海岛棉种间杂交进行了研究,也证明杂种第一代有显著杂种优势,但一般认为二代以後已没 Numerous production practices and researches prove that the hybridization of organisms, even if the parents’ differences are very small, is beneficial to the growth and development of the offspring, so-called heterosis. The degree of heterosis shows the blood relationship between hybrid parents. In general, the interspecific hybrids are more viable than the self-pollinated offspring, and the interspecific hybrids are stronger than the interspecific hybrids.Many experimental and research institutes in Xinjiang have studied interspecific hybridization between G. hirsutum and G. barbadense and also proved The first generation hybrid hybrids have significant heterosis, but generally believed that after the second generation has not