The Geographic Distribution and Natural Variation of the Rice Blast Fungus Avirulence Gene <i>AVR-Pita1</i> in Southern China.

ABSTRACT: The avirulence (AVR) genes of the filamentous ascomycete fungus Magnaporthe oryzae (M. oryzae) are known to mutate rapidly under a higher selection pressure, allowing the pathogen to evade recognition by rice resistance (R) genes. Understanding the geographic distribution and natural variation of AVR genes is critical for the rational utilization and prolonging of the effectiveness of R genes. In this study, a total of 1060 M. oryzae strains collected from 19 rice blast nurseries in 13 provinces across southern China were subjected to presence/absence variation (PAV), genetic variation, and virulence analyses of the AVR-Pita1 gene. PCR amplification results indicated that AVR-Pita1 was present in only 57.45% of the blast

SUBMITTER: Chen X 

PROVIDER: S-EPMC12030372 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature