Mechanisms of host jump and evolution of Pyricularia oryzae Triticum pathotype

2016 Fiscal Year Final Research Report

• Project/Area Number: 26292025
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Plant protection science
• Research Institution: Kobe University
• Principal Investigator: TOSA Yukio 神戸大学, (連合)農学研究科(研究院), 教授 (20172158)
• Research Collaborator: Valent Barbara Kansas State University ; Farman Mark University of Kentucky
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: Pyricularia oryzae / コムギいもち病菌 / ホストジャンプ

Outline of Final Research Achievements

Lolium isolate TP2 (pathogenic on ryegrass) and Avena isolate Br58 (pathogenic on oat) of P. oryzae gained virulence on common wheat through disruption of their avirulence gene(s), PWT3 and PWT3/PWT4, respectively, suggesting that loss of function of these avirulence genes leads to the emergence of the wheat blast fungus (Triticum isolates). The current Triticum isolates had mutations in PWT3 - insertion of transposable elements or nucleotide substitutions. The avirulence of Eleusine isolate MZ5-1-6 (pathogenic on finger millet) on common wheat was controlled by five genes. One of them was cloned and designated as PWT6.

Free Research Field

植物病理学