利用FBP7::iaaM转基因材料同步改良短季棉品种晋棉11纤维产量和品质  

Improving Fiber Yield and Quality in the Short Season Cotton Variety Jinmian 11 by Introducing FBP7::iaaM

作　　者：丁晓艳 赵娟 钱山山 阎星颖 裴炎 DING Xiao-Yan;ZHAO Juan;QIAN Shan-Shan;YAN Xing-Ying;and PEI Yan＊(Biotechnology Research Center,Southwest University,Chongqing,400716,China)

机构地区：[1]西南大学生物技术中心,重庆400716

出　　处：《作物学报》2018年第8期1152-1158,共7页Acta Agronomica Sinica

基　　金：国家育种重大专项(2016YFD0100505);国家转基因生物新品种培育科技重大专项(2016ZX08005-003-004);国家自然科学基金项目(31130039)资助~~

摘　　要：棉花在我国国民经济中具有举足轻重的地位。短季棉品种有利于提高土地利用率,对于人多地少的中国来说,发展短季棉对棉花的可持续发展具有重要意义。因此,提高短季棉品种的产量和品质成为当前棉花育种的重要课题。前期工作中我们通过时空精确调控iaaM基因,适当增加生长素在棉花胚珠种皮中的水平,获得了纤维产量和细度同步改良的转基因棉花材料IF1-1(FBP7::iaaM)。本文通过回交育种,将FBP7::iaaM基因导入低衣分、高马克隆值的短季棉品种晋棉11,获得了衣分提高、马克隆值降低、同时保留早熟特点的回交后代JBC4。连续2年的田间试验表明,JBC4的衣分比回交亲本提高了12.8%,小区纤维产量增加56.3%,马克隆值降低10.7%。说明该转基因性状能在杂交和回交过程中稳定遗传,可用于棉花产量和马克隆值的定向改良。Short season cotton is of particular importance for sustainable development of cotton production in China where has a huge population and limited arable land resources. Usually, early maturity is associated with lower yield and poor quality. We previously developed a novel transgenic cotton material with improved fiber yield and quality by spatiotemporal manipulation of auxin biosynthesis in cotton ovule epidermal cells. In this study, we introduced FBP7：：iaaM into a short season cotton variety Jinmian 11, which has low lint percentage and high macronaire value, through backcross breeding. A consecutive two-year field experiment indicated that the transgenic-homozygous backcrossed progeny （JBC4） exhibited a significant improvement in fiber yield and fiber fineness. Compared with Jinmian 11, lint percentage and lint yield of JBC4 increased by 12.8% and 56.3%, respec-tively, and meanwhile, the micronaire value decreased by 10.7%. Our data demonstrate a significant potential of the FBP7：：iaaM transgenic in the yield and quality improvement for short season cotton.

关 键 词：生长素 转基因 短季棉 回交 衣分 马克隆值 

分 类 号：S562[农业科学—作物学]