Phylogeny, divergence time and historical biogeography of Laetiporus (Basidiomycota, Polyporales).
Phylogeny, divergence time and historical biogeography of Laetiporus (Basidiomycota, Polyporales).
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DOI：
10.1186/s12862-017-0948-5
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发表时间：
2017-04-20
影响因子：
3.4
通讯作者：
Cui BK
中科院分区：
文献类型：
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作者：
Song J;Cui BK
本研究的目的是研究东亚、欧洲、泛美、夏威夷和南非重要的褐腐菌属莱蒂孢霉的分子亲缘关系、起源和历史生物地理学。我们使用了六个遗传标记来评估属水平的系统发育，包括(1)内转录间隔区(ITS)，(2)核大亚基rDNA(NrLSU)，(3)核小亚基rDNA(NrSSU)，(4)翻译延伸因子1-α(EF-1α)，(5)DNA导向的RNA聚合酶II亚单位2(RPB2)，和(6)线粒体小亚单位rDNA(MtSSU)。多位点系统发育分析的结果表明，至少有17个种水平的谱系有分支支持，其中包括中国的两个新种。利用BEAST的分子测年技术估计，现在的冠群大约在2016万年前(Mya)在中新世早期分化。利用RASP进行的生物地理分析表明，莱特孢子虫很可能起源于温带地区，东亚和北美是其祖先地区的概率最高(48%)。首次建立了四条洲际扩散路线和一条可能的隐蔽扩散路线。本文的在线版本(doi：10.1186/s12862-0170948-5)包含补充材料，授权用户可以使用。
The aim of this study was to characterize the molecular relationship, origin and historical biogeography of the species in important brown rot fungal genus Laetiporus from East Asia, Europe, Pan-America, Hawaii and South Africa. We used six genetic markers to estimate a genus-level phylogeny including (1) the internal transcribed spacer (ITS), (2) nuclear large subunit rDNA (nrLSU), (3) nuclear small subunit rDNA (nrSSU), (4) translation elongation factor 1-α (EF-1α), (5) DNA-directed RNA polymerase II subunit 2 (RPB2), and (6) mitochondrial small subunit rDNA (mtSSU). Results of multi-locus phylogenetic analyses show clade support for at least seventeen species-level lineages including two new Laetiporus in China. Molecular dating using BEAST estimated the present crown group diverged approximately 20.16 million years ago (Mya) in the early Miocene. Biogeographic analyses using RASP indicated that Laetiporus most likely originated in temperate zones with East Asia and North America having the highest probability (48%) of being the ancestral area. Four intercontinental dispersal routes and a possible concealed dispersal route were established for the first time. The online version of this article (doi:10.1186/s12862-017-0948-5) contains supplementary material, which is available to authorized users.