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

2011 Fiscal Year Final Research Report

• Project/Area Number: 22658014
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Plant pathology
• Research Institution: Kobe University
• Principal Investigator: TOSA Yukio 神戸大学, 大学院・農学研究科, 教授 (20172158)
• Project Period (FY): 2010 – 2011
• Keywords: いもち病 / 非病原力遺伝子

Research Abstract

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.

Research Products

• [Journal Article] Multiple translocation of the AVR-Pita effector gene among chromosomes of the rice blast fungus Magnaporthe oryzaeand related species (2011)
  • Author(s): Chuma, I., Isobe, C., Hotta, Y., Ibaragi, K., Futamata, N., Kusaba, M., Yoshida, K., Terauchi, R., Fujita, Y., Nakayashiki, H., Valent, B., and Tosa, Y.
  • Journal Title: PLoS Pathogens Pages: e1002147