国立研究開発法人 国際農林水産業研究センター | JIRCAS

Races of Bipolaris maydis Occurring in Japan and Their Pathogenicity to the rhm Resistant Corn Line

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

The 76 isolates of Bipolaris maydis were obtained from diseased corn leaves collected at 35 sites in Japan and their mating type were determined by pairing with tester isokates, as in the case of the 4 isolates obtained from Panicum spp. and Bothriochloa sp. All the isolates were equally pathogenic to the differential lines of corn with T-cms, C-cms and N-c type cytoplasms in spore-spraying tests. They did not cause wilting of leaves in any type of cytoplasms in toxin tests and no host-specific toxins were detected. As a result, all the Japanese isolates were assigned to race O. Although the 75 isolates from corn produced only small and chlorotic lesions in the rhm resistant corn line, one isolate caused severe symptoms with typical and large lesions. The increased ability to cause lesion enlargement of the isolate in the rhm resistant line was attributed to the increase in the number of appressoria formed at the time of spore germination and faster hyphal extension in the host cells. This is the first report on a B. maydis isolate virulent to the rhm corn line in the world.

刊行年月1996-04-01
作成者Takao TSKIBOSHI Hironori KOGA Tsutomu UEMATSU
データ作成日1996-04-01
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
30
2
開始ページ91
終了ページ96
言語eng