Identification of a candidate gene for resistance to root-knot nematode in a wild peach and screening of its polymorphisms
文献类型: 外文期刊
第一作者: Cao, Ke
作者: Cao, Ke;Wang, Lirong;Zhao, Pei;Zhu, Gengrui;Fang, Weichao;Chen, Changwen;Wang, Xinwei
作者机构:
关键词: Meloidogyne;resistance gene;root-knot nematode;peach;linkage mapping
期刊名称:PLANT BREEDING ( 影响因子:1.832; 五年影响因子:1.956 )
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收录情况: SCI
摘要: Root-knot nematode disease, caused by Meloidogyne species, is an important soil-borne disease of peach (Prunus persica L.) worldwide. To identify a major locus of genetic resistance to M. incognita. PkMi, in a wild peach species, we reconstructed a linkage group in a BC1 population of 187 lines using resistance gene analogue markers surrounding the PkMi locus. A resistance gene analogue marker, ppa021062m, co-segregated with the PkMi locus and was therefore considered a strong candidate for PkMi. Phylogenetic analysis of the deduced protein sequences of ppa021062m, together with the other seven genes for nematode resistance, allowed ppa021062m to be assigned to the Toll/Interleukin1 Receptor-Nucleotide Binding Site-Leucine Rich Repeat class, similar to Ma in myrobalan plum (P. cerasifera). Comparative analysis of the candidate gene sequence in four genotypes that had different levels of resistance to root-knot nematode disease showed that most non-synonymous SNPs in the genic region were distributed in the TIR and NBS motifs. This study enhances our understanding of the genetic and molecular control of resistance to root-knot nematode disease in peach
分类号: S3
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