Speciation in Pyyicularia inferred from multilocus phylogenetic analysis
Speciation in Pyyicularia inferred from multilocus phylogenetic analysis
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DOI：
10.1016/j.mycres.2007.05.014
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发表时间：
2007-07-01
影响因子：
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通讯作者：
Tosa, Yukio
中科院分区：
文献类型：
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作者：
Hirata, Kenji;Kusaba, Motoaki;Tosa, Yukio
基于rDNA-ITS、肌动蛋白、β-微管蛋白和钙调蛋白基因座对不同寄主植物上的稻瘟病菌分离物进行了多位点系统发育分析。一个组合基因树对7个群体进行了100%BS支持，表明它们是由所有4个基因座一致支持的单系群体。通过结合生物学和形态物种标准，这七个组中的每一个都被认为是当前物种。然而，在单基因树和组合树中，这些物种之间的系统发育关系尚未得到解决。此外，在组合基因树中不止一次发生了从协调到冲突的转变。对它们的解释是假设稻瘟病菌是通过反复的物种辐射进化而来的。不同于当前物种极限的过渡点被认为是前一物种的极限。(C)2007年英国真菌学会。爱思唯尔有限公司出版。保留所有权利。
Pyricularia isolates from various host plants were subjected to a multilocus phylogenetic analysis based on rDNA-ITS, actin, beta-tubulin, and calmodulin loci. A combined gene tree resolved seven groups with 100% BS support, suggesting that they are monophyletic groups supported concordantly by all four loci. By incorporating biological and morphological species criteria, each of the seven groups was considered to be a current species. However, phylogenetic relationships among these species were unresolved in the single-gene trees and in the combined tree. Furthermore, the transition from concordance to conflict occurred more than once in the combined gene tree. They were interpreted by assuming that Pyricularia has evolved through repeated species radiation. The transition point other than the current species limit was considered to be the limit of the former species. (C) 2007 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.