A multilocus gene genealogy concordant with host preference indicates segregation of a new species, Magnaporthe oryzae, from M-grisea
A multilocus gene genealogy concordant with host preference indicates segregation of a new species, Magnaporthe oryzae, from M-grisea
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DOI：
10.2307/3761719
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发表时间：
2002-07-01
期刊：
影响因子：
2.8
通讯作者：
Kohn, LM
中科院分区：
文献类型：
--
作者：
Couch, BC;Kohn, LM
稻瘟病菌（Magnaporthe oryzae）是一种不同于稻瘟病菌的新种。利用肌动蛋白、β -微管蛋白和钙调蛋白这三个基因的部分，推断出了Magnaporthe物种的基因树。这些基因树是一致的，并在稻瘟病菌中区分出两个不同的分支。一个分支与草属Digitaria有关，因此在命名上与M. grisea有关。另一个进化支与水稻唾液和其他栽培草有关，并被描述为一个新种，M. oryzae。虽然还没有形态学特征将它们区分开来，但m.o ryzae与m.g risea的区别是通过三个位点中每个位点的碱基替换以及实验室交配的结果；稻瘟病菌和稻瘟病菌不相互干扰。考虑到稻瘟病菌是稻瘟病菌和灰叶斑病菌分离株的科学正确名称，继续使用稻瘟病菌分离株将需要正式的命名保护。
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 saliva 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.