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. 2015 Dec;105(12):1568-72.
doi: 10.1094/PHYTO-02-15-0034-R. Epub 2015 Nov 10.

Rmg8, a New Gene for Resistance to Triticum Isolates of Pyricularia oryzae in Hexaploid Wheat

Vu Lan Anh  1 , Nguyen Tuan Anh  1 , Analiza Grubanzo Tagle  1 , Trinh Thi Phuong Vy  1 , Yoshihiro Inoue  1 , Shigeo Takumi  1 , Izumi Chuma  1 , Yukio Tosa  1
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Free article

Rmg8, a New Gene for Resistance to Triticum Isolates of Pyricularia oryzae in Hexaploid Wheat

Vu Lan Anh et al. Phytopathology. 2015 Dec.
Free article

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.

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