Why do avirulence genes of the rice blast fungus undergo multiple translocation?-A hypothesis that crabgrass plays a role as their repository

为什么稻瘟病菌的无毒基因会发生多次易位？-马唐充当其储存库的假设

• 批准号: 22658014
• 负责人: TOSA Yukio
• 金额: $ 2.23万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22658014/
• 关键词: いもち病; 非病原力遺伝子; Magnaporthe oryzae; Pyricularia oryzae; イネ; メヒシバ; Pricularia oryzae; Avirulence gene; Rice; Blast; crabgrass

We examined distribution of avirulence genes in Pycucularia populations. AVR-Pita2, a homolog of the AVR-Pita avirulence gene family corresponding to the Pita resistance gene, was found in Panicum isolates of P. oryzae and Digitaria isolates of P. grisea. AVR-Pii2, a homolog of the AVR-Pii family corresponding to the Pii resistance gene, was found in Oryza isolates of P. oryzae and Cenchrus isolates of Pyricularia sp. AVR-Pii3, another homolog of the AVR-Pii family, was present in Triticum isolates of P. oryzae and Cenchrus isolates of Pyricularia sp. These results suggest that horizontal transfer of avirulence genes are not rare event in the blast fungi.

我们研究了毒力基因在水蛭种群中的分布。AVR-Pita2是与Pita抗性基因对应的AVR-Pita无毒基因家族的同源基因，在稻瘟病病菌的Panicum分离株和稻瘟病病菌的Digitaria分离株中发现。在稻瘟病菌稻谷分离株和稻瘟病菌Cenchrus分离株中发现了与Pii抗性基因对应的AVR-Pii2家族同源物，在稻瘟病菌小麦分离株和稻瘟病菌Cenchrus分离株中发现了AVR-Pii3家族同源物，说明毒力基因的水平转移在稻瘟病菌中并不罕见。

项目成果

Multiple translocation of the AVR-Pita effector gene among chromosomes of the rice blast fungus Magnaporthe oryzae and related species.

• DOI: 10.1371/journal.ppat.1002147
• 发表时间: 2011-07
• 期刊: PLoS pathogens
• 影响因子: 6.7
• 作者: Chuma I;Isobe C;Hotta Y;Ibaragi K;Futamata N;Kusaba M;Yoshida K;Terauchi R;Fujita Y;Nakayashiki H;Valent B;Tosa Y
• 通讯作者: Tosa Y