Identification of a Resistance Gene bls1 to Bacterial Leaf Streak in Wild Rice Oryza rufipogon Griff.

文献类型： 外文期刊

第一作者： Li Rong-bai

作者： Li Rong-bai;Li Xiao-qiong;Liu Chi;Zhang Yue-xiong;Ma Zeng-feng;Yang Yong;He Wen-ai;Qiu Yong-fu;He Wen-ai;Huang Da-hui;Li Rong-bai;Qiu Yong-fu;Li Rong-bai;Song Jian-dong;Yang Hai-ning;Zheng Jia-xing;Huang Yue-yue

作者机构：

关键词： bacterial leaf streak;Xanthomonas oryzae pv. oryzicola;Oryza rufipogon Griff.;gene mapping;marker-assisted selection (MAS)

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2012 年 11 卷 6 期

页码：

收录情况： SCI

摘要： Bacterial leaf streak (BLS) of rice, caused by Xanthomonas oryzae pv. oryzicola (Xoc) is a worldwide destructive disease. Development of resistant varieties is considered to be one of the most effective and eco-friendly ways to control the disease. However, only a few genes/QTLs having resistance to BLS have been identified in rice until now. In the present study, we have identified and primarily mapped a BLS-resistance gene, bls1, from a rice line DP3, derived from the wild rice species Oryza rufipogon Griff. A BC2F2 (9311/DP3//9311) population was constructed to map BLS-resistance gene in the rice line DP3. The segregation of the resistant and susceptible plants in BC2F2 in 1:3 ratio (chi(2)=0.009, chi(2)(0.05),(1) =3.84, P>0.05), suggested that a recessive gene confers BLS resistance in DP3. In bulked segregant analysis (BSA), two SSR markers RM8116 and RM584 were identified to be polymorphic in resistant and susceptible DNA bulks. For further mapping the resistance gene, six polymorphic markers around the target region were applied to analyze the genotypes of the BC,F, individuals. As a result, the BLS-resistant gene, designated as bls1, was mapped in a 4.0-cM region flanked by RM587 and RM510 on chromosome 6.

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