title: Rmg8, a New Gene for Resistance to Triticum Isolates of Pyricularia oryzae in Hexaploid Wheat.
abstract: Blast, caused by Pyricularia oryzae, is one of the major diseases of wheat in South America. We identified a new gene for resistance to Triticum isolates of P. oryzae in common wheat 'S-615', and designated it "resistance to Magnaporthe grisea 8" (Rmg8). Rmg8 was assigned to chromosome 2B through molecular mapping with simple-sequence repeat markers. To identify an avirulence gene corresponding to Rmg8, Triticum isolate Br48 (avirulent on S-615) was crossed with 200R29 (virulent on S-615), an F1 progeny derived from a cross between an Eleusine isolate (MZ5-1-6) and Br48. Segregation analysis of their progeny revealed that avirulence of Br48 on S-615 was conditioned by a single gene, which was designated AVR-Rmg8. AVR-Rmg8 was closely linked to AVR-Rmg7, which corresponded to Rmg7 located on chromosome 2A of tetraploid wheat.
authors.affiliation: Graduate School of Agricultural Sciences, Kobe University, Kobe 657-8501, Japan.
authors.forename: Vu Lan
authors.initials: VL
authors.lastname: Anh
authors.affiliation: Graduate School of Agricultural Sciences, Kobe University, Kobe 657-8501, Japan.
authors.forename: Nguyen Tuan
authors.initials: NT
authors.lastname: Anh
authors.affiliation: Graduate School of Agricultural Sciences, Kobe University, Kobe 657-8501, Japan.
authors.forename: Analiza Grubanzo
authors.initials: AG
authors.lastname: Tagle
authors.affiliation: Graduate School of Agricultural Sciences, Kobe University, Kobe 657-8501, Japan.
authors.forename: Trinh Thi Phuong
authors.initials: TT
authors.lastname: Vy
authors.affiliation: Graduate School of Agricultural Sciences, Kobe University, Kobe 657-8501, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Inoue
authors.affiliation: Graduate School of Agricultural Sciences, Kobe University, Kobe 657-8501, Japan.
authors.forename: Shigeo
authors.initials: S
authors.lastname: Takumi
authors.affiliation: Graduate School of Agricultural Sciences, Kobe University, Kobe 657-8501, Japan.
authors.forename: Izumi
authors.initials: I
authors.lastname: Chuma
authors.affiliation: Graduate School of Agricultural Sciences, Kobe University, Kobe 657-8501, Japan.
authors.forename: Yukio
authors.initials: Y
authors.lastname: Tosa
mesh_terms: D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D017343:Genes, Plant; D054884:Host-Pathogen Interactions / Q000235:genetics*; D003904:Mitosporic Fungi / Q000502:physiology*; D057865:Plant Immunity / Q000235:genetics; D011123:Polyploidy; D014908:Triticum / Q000235:genetics* / Q000276:immunology