水稻抗白叶枯病基因X_(a-14)在分子标记连锁图上的定位  

RFLP Mapping of a Rice Bacterial Blight Resistance Gene X a-14

作　　者：谭震波[1,2] 章琦[1,2] 朱立煌 王春莲[1,2] 

机构地区：[1]中国农业科学院作物育种栽培研究所 [2]中国科学院遗传研究所

出　　处：《遗传》1998年第6期30-33,共4页Hereditas（Beijing)

摘　　要：选取对水稻白叶枯病原菌６个菲律宾小种均为感病的籼稻品种珍珠矮为母本，携带抗病基因Ｘａ－１４的粳稻近等基因系ＣＢＢ１４（抗菲律宾５号小种Ｐ５）为父本配制杂交组合。Ｆ１植株对相对应的菌系Ｐ５表现全生育期抗病，Ｆ２群体在分蘖前期接种鉴定结果表明，抗、感植株的分离符合３∶１显性单基因分离比。根据对Ｆ２群体中选择的９９个单株进行的ＲＦＬＰ分析的结果，构建了水稻第４连锁群的分子图谱，并把抗病基因Ｘａ－１４定位于ＲＧ６２０和Ｇ２８２之间。In order to map a rice bacterial blight resistance gene X a-14 , a F 2 population containing 99 plants was generated from a cross between Zhenzhuai (susceptible to all six Philippines races) and CBB14 with X a-14 (resistant to race 5) It was observed that resistant and susceptible plants were segregated in a ratio of 3∶1 (χ 2 =0 570) Based on RFLP analysis in the population, a molecular linkage map of chromosome 4 was constructed, and the gene X a-14 was located between RFLP markers RG620 and G282

关 键 词：水稻 白叶枯病 基因定位 RFLP分析 抗性基因 

分 类 号：S511.032[农业科学—作物学] S432.21