Evidence of a Gene-for-Gene Relationship in the Oryza sativa - Magnaporthe grisea Pathosystem

A cross was made between two field isolates of pathogenic to rice. Full-sib crosses between F ascospores, followed by backcrosses to the female fertile parent GUY11, produced perithecia fertile enough for tetrad isolation. Genetic analysis of the pathogen revealed that avirulence to the rice cultiva...

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Bibliographic Details
Published in:Phytopathology Vol. 115; no. 8V; p. 577
Main Authors: Silué, Drissa, Notteghem, Jean Loup, Tharreau, Didier
Format: Journal Article
Language:English
Published: United States 01.08.2025
Subjects:
Crosses, Genetic
Magnaporthe - genetics
Magnaporthe - pathogenicity
Magnaporthe - physiology
Oryza - genetics
Oryza - immunology
Oryza - microbiology
Plant Diseases - microbiology
Virulence
rice blast
ISSN:0031-949X
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Summary:A cross was made between two field isolates of pathogenic to rice. Full-sib crosses between F ascospores, followed by backcrosses to the female fertile parent GUY11, produced perithecia fertile enough for tetrad isolation. Genetic analysis of the pathogen revealed that avirulence to the rice cultivar Pi-n°4 is controlled by one gene ( ) unlinked to the gene MAT1-1, which is responsible for mating type. Additionally, resistance of Pi-n°4 was found to be controlled by one gene. Thus, existence of a gene-for-gene relationship was shown for the pathosystem .
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ISSN:0031-949X
DOI:10.1094/Phyto-82-577