Parasexual Recombination in Magnaporthe oryzae

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
本文フルテキスト
45-01-06.pdf109.99 KB

Parasexual recombination is thought to be one of the causes of variation in the pathogenicity of rice blast fungus, Magnaporthe oryzae, which breaks down resistant rice varieties. In this study, the virulence and fitness of parasexual recombinants of M. oryzae were examined in vitro and in the field. According to the results of the genetic analysis of the pathogenicity of parasexual recombinants of the fungus, the segregation ratios of avirulence and virulence among recombinants on rice cultivar Hattan 3 and line K59-1 were consistent with those of the sexual progeny of the fungus. This indicated that the avirulent genes of the parasexual recombinants were segregated in a manner similar to that in sexual reproduction. The fitness of parasexual recombinants derived from co-cultures of parental isolates was also investigated. The recombinants produced intermediate-sized lesions and intermediate numbers of spores between the parents on the host. Plants inoculated with the recombinant also showed intermediate disease severities between the parents in the field. Parasexual recombinants can attack a rice multiline system because their virulence and fitness is inherited from the parents.

刊行年月日
作成者 TSUJIMOTO NOGUCHI Masako
著者キーワード

aggressiveness

fitness

Pyricularia oryzae

公開者 Japan International Research Center for Agricultural Sciences
オンライン掲載日
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
45
1
開始ページ 39
終了ページ 45
DOI 10.6090/jarq.45.39
権利 Japan International Research Center for Agricultural Sciences
言語 eng

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