3个黄褐棉近等基因系的选择及评价  

Selection and Evaluation of Three Gossypium mustelinum Near-Isogenic Lines

作　　者：汪保华[1] 王为[2] 庄智敏[1] 朱新宇[1] 

机构地区：[1]南通大学生命科学院,江苏南通226019 [2]江苏沿海地区农业科学研究所,江苏盐城224002

出　　处：《中国农学通报》2011年第24期45-49,共5页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金"利用黄褐棉(Gossypium mustelinum)导入系发掘利用其优异基因"(31000729);江苏省普通高校自然科学基金"盐胁迫下的棉花表观遗传学初步研究;放线菌根植物属级水平的系统发育与进化研究"(10KJB210004;09KJB180006);南通市科技创新计划"黄褐棉导入系的遗传评价与基于QTL的近等基因系分子设计"(生物技术及新医药专项AS2010018)

摘　　要：为了发掘利用黄褐棉的优异基因并用以改良陆地棉纤维品质,通过陆地棉与黄褐棉种间杂交构建了一套回交高世代群体,通过标记辅助选择及纤维品质鉴定选出3个近等基因系。结果表明,所选的近等基因系遗传背景与陆地棉亲本基本相同,仅在少数几条染色体上具备黄褐棉渐渗片段,这些渐渗片段主要集中分布于1号、14号以及19号染色体。3个近等基因系的纤维强度表现突出,纤维细度优良,有望通过精细定位发现控制纤维强度及麦克隆值的QTL,同时这3个近等基因系可以作为种质资源供纤维强度和细度改良育种应用。In order to exploit elite genes from Gossypium mustelinum so as to improve fiber quality of Upland cotton（G.hirsutum）,a set of advanced backcross population was constructed by interspecific crossing between G.mustelinum and G.hirsutum.Based on marker-assisted selection and identification of fiber quality performance,three near-isogenic lines（NILs） were selected from this set of advanced backcross population,which had almost the same genetic background as the recurrent G.hirsutum parent,except for a few introgression segments of G.mustelinum mainly distributed on chromosome 1,chromosome 14 and chromosome 19.The NILs had elite fiber strength and fiber fineness,which provided great opportunities to detect QTLs controlling fiber strength and micronaire value via fine mapping;meanwhile,these NILs could be released as germplasm to improve fiber strength and fineness in cotton breeding.

关 键 词：黄褐棉 近等基因系 纤维强度 纤维细度 育种 

分 类 号：S562[农业科学—作物学]