棉花转Ｂｔ基因抗虫棉双隐性核雄性不育系—中抗Ａ是通过杂交、回交和株对株侧交等技术，将从美国引进的原始双隐性核雄性不育基因（ｍｓ５ｍｓ６）转育到丰产、优质、抗病品种中棉所１２中去，经过定向选择，培育具有综合优良性状的双隐性核雄性不育系；在此基础上，又将... Bt transgenic cotton double recessive nuclear male sterile line - Zhongqian A is through hybridization, backcross and strain on the plant side to pay and other technologies, the introduction of the original double recessive nuclear male sterile gene from the United States (ms5ms6 ) To the high yield, high quality, disease-resistant varieties in the cotton in 12 to go through the targeted selection, cultivate a double recessive nuclear male sterile lines with comprehensive fine traits; on this basis, in turn ...