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有关稻白叶枯病的抗性遗传研究,自1967年日本的西村首次报道了第一个抗白叶枯病基因以来,迄今在水稻上总共发现并命名了12个位点上的15个抗白叶枯病基因。其中,4个显性基因 Xa-1、Xa-2、Xa-3;Xa-kg 包括两个复等位基因 Xa-1~h、Xa-kg~h 是由日本用日本的菌系鉴定和命名的~((37)),另5个显性抗病基因 Xa-4、Xa-6、Xa-7、Xa-10、Xa-11和3个隐性抗病基因 xa-5、xa-8、xa-9包括一个复等位基因 Xa-4~b 是由国际水稻研究所用菲律宾菌系鉴定和命名的~((6))。我国是水稻白叶枯病抗性资源中心地之一~((1))。有些地方品种不仅抗病,而且农艺性状优良。为了使地方抗源和外来抗源在抗病育种中能科学合理地利用,本文研究了耒阳多毛等5个水稻品种对白叶枯病的抗性遗传及其抗性基因与已知几个基因间的等位关系。
For the genetic study of resistance to rice leaf blight, up to now, a total of 15 antigens at 12 loci have been found and named in rice so far since the first bacterial leaf blight resistance gene was first reported in Xicun of Japan in 1967 Bacterial blight gene. Among them, the four dominant genes Xa-1, Xa-2, Xa-3; Xa-kg include two complex alleles Xa-1 to h, (Xa-4, Xa-6, Xa-7, Xa-10, Xa-11 and three recessive resistance genes xa-5, 8, xa-9 includes a complex allele Xa-4 ~ b is ~ ((6)) identified and named by the International Phytophthora Philippines strain. China is one of the centers of rice bacterial blight resistance resources ((1)). Some local varieties not only resistant to disease, but also agronomic traits. In order to make local anti-source and foreign anti-resistant breeding scientifically and reasonably utilized in disease-resistant breeding, the genetic and resistance genes of five rice cultivars The relationship between the alleles.