Department of Botany, University of Toronto, Mississauga Ontario, Canada L5L 1C6.
Mycologia. 2002 Jul-Aug;94(4):683-93. doi: 10.1080/15572536.2003.11833196.
Magnaporthe oryzae is described as a new species distinct from M. grisea. Gene trees were inferred for Magnaporthe species using portions of three genes: actin, beta-tubulin, and calmodulin. These gene trees were found to be concordant and distinguished two distinct clades within M. grisea. One clade is associated with the grass genus Digitaria and is therefore nomenclaturally tied to M. grisea. The other clade is associated with Oryza sativa and other cultivated grasses and is described as a new species, M. oryzae. While no morphological characters as yet distinguish them, M. oryzae is distinguished from M. grisea by several base substitutions in each of three loci as well as results from laboratory matings; M.oryzae and M. grisea are not interfertile. Given that M. oryzae is the scientifically correct name for isolates associated with rice blast and grey leaf spot, continued use of M. grisea for such isolates would require formal nomenclatural conservation.
稻瘟病菌被描述为一个不同于灰霉菌的新物种。使用三个基因的部分序列：肌动蛋白、β-微管蛋白和钙调蛋白，对稻瘟病菌种进行了基因树推断。这些基因树是一致的，并区分了灰霉菌内的两个不同分支。一个分支与草属 Digitaria 相关，因此在命名上与灰霉菌有关。另一个分支与稻属和其他栽培草相关，被描述为一个新物种，稻瘟病菌。虽然目前还没有形态学特征可以区分它们，但稻瘟病菌与灰霉菌在三个基因座的每个基因座中的几个碱基替换以及实验室交配的结果上有所不同；稻瘟病菌和灰霉菌不能杂交。鉴于稻瘟病菌是与稻瘟病和灰斑病相关的分离物的科学正确名称，继续将灰霉菌用于此类分离物将需要正式的命名保护。
