云南省稻瘟病菌的交配型分布  

Distribution of the Mating Type in Magnaporthe grisea Population Pathogenic to Rice in Yunnan Province

作　　者：李成云[1] 陈琼珠[1] 陈宗麒[1] 罗朝喜[1] 林长生 伊势一男 

机构地区：[1]云南省农业科学院植物保护研究所 [2]日本农林水产省农业研究中心 [3]日本农林水产省国际农林水产业研究中心

出　　处：《中国农业科学》1996年第6期60-64,共5页Scientia Agricultura Sinica

基　　金：云南省科委应用基础研究基金资助重点项目

摘　　要：对在云南省４３个县采集到的１３１１个稻瘟病菌菌株的有性世代的研究结果表明：（１）在云南省ＭＡＴ１－２的菌株数量较多，占能形成有性世代菌株数的６２．８％；普文县等１１个县市ＭＡＴ１－１和ＭＡＴ１－２两种交配型的菌株都有分布；而大理等３个县市只分离到ＭＡＴ１－１交配型，昆明市等１３个县市只分离到ＭＡＴ１－２交配型。（２）云南陆稻上分离的稻瘟病菌中，能形成有性世代的菌株比例较高；有性世代形成能较高的两性菌株也较多。（３）在部分陆稻地块，两种交配型的菌株同时存在，甚至从同一病斑上都可分离到能互相交配的两种交配型的菌株。In a study on the distribution of the mating type of Magnaporthe grisea 1311 field strains were collected from rice in 43 counties of Yunnan Province, China. Each of the isolates was tested for mating type with MAT1 1 and MAT1 2 fertile (hermaphroditic) standard isolates (a laboratory strain isolated from the cross of two finger millet strains). The results show:(1) Strains of MAT1 2 were more than those of MAT1 1 in Yunnan, two mating types were found in 11 counties, only MAT1 1 strains present in 3 counties and MAT1 2 strains present in 13 counties. (2) The high ratio of perfect state formation was found in strains isolated from upland rice, and almost all hermaphroditic strains were isolated from upland rice . (3) Two mating types were present in a same site of upland rice fields, and sometimes present in one lesion. This suggests that the perfect state may be present in the pathogen in upland rice plants naturally in Yunnan.

关 键 词：稻瘟病菌 有性世代 交配型 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]