Genome organization and evolution of the AVR-pita avirulence gene family in the Magnaporthe grisea species complex

Hyun Khang Chang, Sook Young Park, Yong Hwan Lee, Barbara Valent, Seogchan Kang

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

The avirulence (AVR) gene AVR-Pita in Magnaporthe oryzae prevents the fungus from infecting rice cultivars containing the resistance gene Pi-ta. A survey of isolates of the M. grisea species complex from diverse hosts showed that AVR-Pita is a member of a gene family, which led us to rename it to AVR-Pita1. Avirulence function, distribution, and genomic context of two other members, named AVR-Pita2 and AVRPita3, were characterized. AVR-Pita2, but not AVR-Pita3, was functional as an AVR gene corresponding to Pi-ta. The AVR-Pita1 and AVR-Pita2 genes were present in isolates of both M. oryzae and M. grisea, whereas the AVR-Pita3 gene was present only in isolates of M. oryzae. Orthologues of members of the AVR-Pita family could not be found in any fungal species sequenced to date, suggesting that the gene family may be unique to the M. grisea species complex. The genomic context of its members was analyzed in eight strains. The AVR-Pita1 and AVR-Pita2 genes in some isolates appeared to be located near telomeres and flanked by diverse repetitive DNA elements, suggesting that frequent deletion or amplification of these genes within the M. grisea species complex might have resulted from recombination mediated by repetitive DNA elements.

Original languageEnglish (US)
Pages (from-to)658-670
Number of pages13
JournalMolecular Plant-Microbe Interactions
Volume21
Issue number5
DOIs
StatePublished - May 1 2008

Fingerprint

Magnaporthe
Magnaporthe grisea
Genome
genome
Magnaporthe oryzae
Genes
genes
genomics
gene amplification
Gene Amplification
DNA
telomeres
Telomere
Genetic Recombination
Fungi
rice
fungi

All Science Journal Classification (ASJC) codes

  • Physiology
  • Agronomy and Crop Science

Cite this

Chang, Hyun Khang ; Park, Sook Young ; Lee, Yong Hwan ; Valent, Barbara ; Kang, Seogchan. / Genome organization and evolution of the AVR-pita avirulence gene family in the Magnaporthe grisea species complex. In: Molecular Plant-Microbe Interactions. 2008 ; Vol. 21, No. 5. pp. 658-670.
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Genome organization and evolution of the AVR-pita avirulence gene family in the Magnaporthe grisea species complex. / Chang, Hyun Khang; Park, Sook Young; Lee, Yong Hwan; Valent, Barbara; Kang, Seogchan.

In: Molecular Plant-Microbe Interactions, Vol. 21, No. 5, 01.05.2008, p. 658-670.

Research output: Contribution to journalArticle

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