Application of Functional Markers to Identify Genes for Bacterial Blight Resistance in Oryza rufipogon

doi:10.1016/S1672-6308(08)60106-7

摘要/Abstract

摘要： Field resistances of nine accessions of common wild rice (Oryza rufipogon Griff.) and one rice variety (IR24) were evaluated by using nine strains of bacterial blight pathogen (Xanthomonas oryzae pv. oryzae) from the Philippines. IR24 was highly susceptible to all the strains, and six common wild rice accessions resisted all the nine strains, with a resistance frequency of 67%. The accessions Yulin and Wanning were only susceptible to PXO280 and PXO71, respectively. The accession Gaozhou was susceptible to the three strains PXO79, PXO99 and PXO339, whereas resistant to the other six strains. It could be concluded that there is at least one resistance gene in each common wild rice accession. The functional markers of the genes xa5, xa13, Xa21 and Xa27 were used to detect the presence of these resistance genes in the nine tested wild rice accessions, and it was found that four wild rice accessions contained heterozygous xa13. Among the nine common wild rice accessions, five were homozygous for Xa27 and three homozygous for xa27, and the accession Laibin contained neither xa27 nor Xa27. In addition, there were no xa5 and Xa21 in all of these accessions.

关键词: Oryza rufipogon, bacterial blight, resistance gene, functional marker

XIA Zhi-hui, HAN Fei, GAO Li-fen, YUAN Qian-hua, ZHAI Wen-xue, LIU Di, LUO Yue-hua. Application of Functional Markers to Identify Genes for Bacterial Blight Resistance in Oryza rufipogon[J]. RICE SCIENCE, 2010, 17(1): 73-76 .

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