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Identification and Fine-Mapping of a New Bacterial Blight Resistance Gene, Xa47(t), in G252, an Introgression Line of Yuanjiang Common Wild Rice (Oryza rufipogon)

文献类型： 外文期刊

作者： Xing, Jiaxin 1 ; Zhang, Dunyu 2 ; Yin, Fuyou 2 ; Zhong, Qiaofang 2 ; Wang, Bo 2 ; Xiao, Suqin 2 ; Ke, Xue 2 ; Wang, Lingxian 2 ; Zhang, Yun 2 ; Zhao, Caimei 3 ; Lu, Yuanda 4 ; Chen, Ling 2 ; Cheng, Zaiquan 2 ; Chen, Lijuan 1 ;

作者机构： 1.Yunnan Agr Univ, Rice Res Inst, Kunming 650201, Yunnan, Peoples R China

2.Yunnan Acad Agr Sci, Biotechnol & Germplasm Resources Inst, Key Lab Southwestern Crop Gene Resources & Germpl, Yunnan Prov Key Lab Agr Biotechnol,Minist Agr, Kunming 650205, Yunnan, Peoples R China

3.Yunnan Univ, Coll Life Sci, Kunming 650091, Yunnan, Peoples R China

4.Yunnan Agr Univ, Coll Plant Protect, Kunming 650201, Yunnan, Peoples R China

关键词： bacterial blight; mapping; Oryza rufipogon; resistance gene

期刊名称：PLANT DISEASE （ 影响因子：4.614； 五年影响因子：5.33 ）

ISSN： 0191-2917

年卷期： 2021 年 105 卷 12 期

页码：

收录情况： SCI

摘要： Bacterial blight (BB) disease caused by Xanthomonas oryzae pv. oryzae is a common, widespread, and highly devastating disease that affects rice yield. Breeding resistant cultivars is considered the most effective measure for controlling this disease. The introgression line G252 derived from Yuanjiang common wild rice (Oryza rufipogon) was highly resistant to all tested strains, including C5, C9, PXO99, PB, T7147Y8, Hzhj19, YM1, YM187, YJdp-2, and YJws-2. To identify the BB resistance gene(s) of G252, we developed an F-2 population from the cross between G252 and 02428. A linkage analysis was performed for the phenotype and genotype of the population. A segregation ratio of 3:1 was observed between the resistant and susceptible individuals in the F2 progeny, indicating a dominant resistance gene, Xa47(t), in G252. The resistance gene was mapped within an approximately 26.24-kb physical region on chromosome 11 between two InDel markers, R13I14 and 13rbq-71. Moreover, one InDel marker, Hxjy-1, co-segregated with Xa47(t). Three genes were predicted within the target region, including a promising candidate gene encoding a nucleotide-binding domain and leucine-rich repeat (NLR) protein (LOC_Os11g46200) by combining the structure and expression analysis. Physical mapping data suggested that Xa47(t) is a new broad-spectrum BB resistance gene without identified allelic genes.

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