双抗8号抗虫棉是中国农科院中农农业技术公司科研人员利用现代科技和育种手段潜心攻关,完成的一项科技新成果。该棉以大铃抗虫棉中棉1138为母体,以转 B.t 基因抗虫棉岱字棉20为父本,并用后者作轮回亲本回交转育后,又注入胰蛋白抑制剂基因后选育出的双价转基因抗虫棉。双抗8号全生育期127～130天,属中熟偏早品种。株高1～1.5米,生长势强,茎秆粗大,根系发达,耐肥,抗倒,不早衰。叶片中等大小,叶色较深,苗期健壮,中期繁茂,透风通光性好,结铃性强,成铃率高,结铃集中。高抗枯萎病和黄萎病,经3年抗病对比试验,抗病性优于中棉12和鲁棉18等。特大棵架,喜大肥大水,在一般水肥条件下栽培,株结铃50-80个,高肥水稀植栽培单株结铃可达100余个,最多达216个。单铃重6.0-6.3克之间,为抗虫棉中特大 Shuangyou 8 insect-resistant cotton is the Chinese Academy of Agricultural Sciences Agricultural Science and Technology Corporation of agricultural science and technology researchers using modern technology and breeding means painstaking research, completed a new scientific and technological achievements. The cotton bollworm cotton Zhongmian 1138 as the mother to Bt transgenic cotton insect-resistant cotton 20 as the male parent, and the latter for the reincarnation of the reincarnation of the parent, after injection of trypsin inhibitor gene selection Bred bivalent transgenic insect-resistant cotton. Double anti-8 on the whole growth period of 127 to 130 days, is a middle-cooked partial early varieties. Plant height of 1 to 1.5 meters, strong growth potential, stalks thick, developed root system, resistant to fat, anti-down, not premature. Leaves of medium size, deep leaf color, seedling robust, mid-term longevity, ventilation and good light, strong bell, boll rate, boll concentration. High resistance to Fusarium wilt and Verticillium wilt disease, after 3 years disease resistance comparative test, disease resistance is better than cotton 12 and cotton and other 18. Large big frame, hi big fat big water, under the conditions of general water and fertilizer cultivation, plant knot bell 50-80, high fertilizer and water thin planting plant boll up to more than 100, up to 216. Single boll weight between 6.0-6.3 grams, especially for insect-resistant cotton