A plastome phylogeny of Rumex (Polygonaceae) illuminates the divergent evolutionary histories of docks and sorrels
A plastome phylogeny of Rumex (Polygonaceae) illuminates the divergent evolutionary histories of docks and sorrels
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DOI：
10.1016/j.ympev.2023.107755
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发表时间：
2023-03-14
影响因子：
4.1
通讯作者：
Burke，Janelle M.
中科院分区：
文献类型：
--
作者：
Koenemann，Daniel M.;Kistler，Logan;Burke，Janelle M.
酸模属（Rumex L.） （蓼科）提供了一个独特的系统来研究性别决定和分子速率进化的进化发展。从历史上看，酸模在分类学和口语上都被分为两组：“码头”和“栗色”。明确的系统发育可以帮助评估这种划分的遗传基础。在这里，我们提出了使用最大似然标准推断的 34 种酸模的质体系统发育。历史上的“码头”（RumexsubgenusRumex）被解析为单系。历史上的“酢浆草”（酸模亚属Acetosella和Acetosella）被一起解析，尽管由于包含R而不是单系的。 bucephalophorus (RumexsubgenusPlatypodium)。Emexis 在 Rumex 中被支持为自己的亚属，而不是被解析为姐妹类群。我们发现码头之间的核苷酸多样性非常低，这与该群体最近的多样化一致，特别是与酢浆草相比。系统发育的化石校准表明酸模（包括Emex）的共同祖先起源于中新世下部（22.13 MYA）。随后，酢浆草似乎以相对稳定的速度实现了多样化。然而，码头的起源位于中新世上部，但大多数物种形成发生在上更新世。
The genusRumexL. (Polygonaceae) provides a unique system for investigating the evolutionary development of sex determination and molecular rate evolution. Historically,Rumexhas been divided, both taxonomically and colloquially into two groups: ‘docks’ and ‘sorrels’. A well-resolved phylogeny can help evaluate a genetic basis for this division. Here we present a plastome phylogeny for 34 species ofRumex, inferred using maximum likelihood criteria. The historical ‘docks’ (RumexsubgenusRumex) were resolved as monophyletic. The historical ‘sorrels’ (RumexsubgeneraAcetosaandAcetosella) were resolved together, though not monophyletic due to the inclusion ofR. bucephalophorus(RumexsubgenusPlatypodium).Emexis supported as its own subgenus withinRumex,instead of resolved as sister taxa. We found remarkably low nucleotide diversity among the docks, consistent with recent diversification in that group, especially as compared to the sorrels. Fossil calibration of the phylogeny suggested that the common ancestor forRumex(includingEmex) has origins in the lower Miocene (22.13 MYA). The sorrels appear to have subsequently diversified at a relatively constant rate. The origin of the docks, however, was placed in the upper Miocene, but with most speciation occurring in the Plio-Pleistocene.