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
出处
《南京农业大学学报》
CAS
CSCD
北大核心
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)
关键词
小麦
赤霉酸
不敏感基因
矮秆基因
遗传
育种
Triticum aestivum L.
gibberellininsensitivity
dwarf gene
linkage
isogenic line
