2010全国生物材料大会论文集之 (98).pdf

Analysis on Key Structural Features of avirulence
genes of Magnaporthe oryzae
Xunchao Xiang ·Yanli Zhang ·Yanping Yao ·
Laboratory of Plant Molecular ics and Breeding, Southwest University of Science and Technology
59 Qinglong Avenue, Fucheng District, Mianyang, China
******@swust.

Abstract-Rice blast, caused by the fungus Magnaporthe oryzae, resistance to strain of M. oryzae only when it includes
is one of the most devastating diseases in rice production, conrresponding avirulence gene. Strain of M. oryzae express
resulting in decrease of yields and quality on a large scale. The avirulence only to rice cultivar that includes resistance gene.
interaction between M. oryzae and rice is based on the To date, twenty five and more R genes encoding proteins that
gene-for-gene hypothesis and the defense responses are often recognize M. oryzae AVRs have been mapped on the rice
activated by the action of the pathogen avirulence (AVR) gene genome[4], and six R genes against different races of M.
and the host resistance (R) gene. The all AVR plete oryzae have been cloned from rice [5-9]. By contrast, only four
sequences of M. oryzae accessed on NCBI nucleotide database AVR genes have been isolated from M. oryzae.
were downloaded and carried sequence alignments so pletion of genome sequencing of M. oryzae offered
getting key structures of AVR gen