小麦赤霉酸不敏感基因Gai3的遗传研究  

Genetic studies on gibberellin acid insensitivity gene Gai 3 in wheat (Triticum aestivum L.)

作　　者：万平[1,2] 齐莉莉[1,2] 陈佩度 赵寅槐 师丽华[1,2] 刘大钧 

机构地区：[1]南京农业大学农业部作物细胞遗传重点开放实验室 [2]江苏省农业科学院

出　　处：《南京农业大学学报》1999年第2期1-5,共5页Journal of Nanjing Agricultural University

基　　金：国家高技术研究发展计划(863计划)

摘　　要：以小麦Ｒｈｔ３的两个株高等基因系及其ＢＣ２３Ｆ２分离群体为材料，分析了与Ｒｈｔ３矮秆基因连锁的赤霉酸不敏感基因Ｇａｉ３的遗传规律及其与Ｒｈｔ３的遗传关系。结果表明：赤霉酸不敏感性由单个显性基因控制，Ｆ２分离比率为３∶１（不敏感∶敏感），非常符合χ２测验。Ｇａｉ３基因与Ｒｈｔ３基因连锁紧密，交换值为０．０６０±０．０１２和０．０５５±０．０１３。Two sets of isogenic line carrying the same dwarf gene Rht 3 for gibberellininsensitive dwarfism in hexapoid wheat( Triticum aestivum L.)were analysed by seedling and sprouting test.The GA3insensitivity was controlled by Gai 3 named previously on chromosome 4BS.The 2 test in F2 segregating population gave a good fit to 31 ratio(insensitivesensitive).So it is reasonable to suggest on that the GAinsensitivity( Gai 3)is controlled by a single dominant gene.The genes for GAinsensitivity and dwarf character are closely linked with recombination values of 00600012 and 00550013 respectively

关 键 词：小麦 赤霉酸 不敏感基因 矮秆基因 遗传 育种 

分 类 号：S512.103.4[农业科学—作物学]