Plastome Phylogenomics of Aucuba (Garryaceae).
Plastome Phylogenomics of Aucuba (Garryaceae).
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DOI：
10.3389/fgene.2022.753719
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发表时间：
2022
影响因子：
3.7
通讯作者：
Chen J
中科院分区：
文献类型：
--
作者：
Huang Y;Fan L;Huang J;Zhou G;Chen X;Chen J
桃叶珊瑚属（Aucuba）是东亚特有的一个属，约有10种万年青木本植物。桃叶珊瑚属植物具有显著的形态特征，具有很高的观赏价值。由于高度的形态分化和可塑性，桃叶珊瑚属的物种定义仍然令人困惑和有问题。在这里，我们测序和特征的完整质体基因组（质体）的桃叶珊瑚物种：桃叶珊瑚chlorascens，桃叶珊瑚eriobotryifolia，桃叶珊瑚japonica。本研究对桃叶珊瑚属10个种中的6个种的7个桃叶珊瑚属质体进行了比较质体分析、系统发育分析和分歧时间估计。比较分析表明，桃叶珊瑚的质体在大小、结构、基因内容和组织方面高度保守，并且表现出高度的序列相似性。基于68个质体蛋白编码基因的系统发育重建支持了墨角菌目、墨角菌科和桃叶珊瑚属的单系性。桃叶珊瑚是姐妹的其他桃叶珊瑚种检查，其独特的融合花药室一致。Aucuba的分歧时间估计约为晚中新世。现存的桃叶珊瑚物种来自于与东亚季风气候的建立和气候波动有关的最近的分歧事件。
Aucuba (Garryaceae), which includes approximately ten evergreen woody species, is a genus endemic to East Asia. Their striking morphological features give Aucuba species remarkable ornamental value. Owing to high levels of morphological divergence and plasticity, species definitions of Aucuba remain perplexing and problematic. Here, we sequenced and characterized the complete plastid genomes (plastomes) of three Aucuba species: Aucuba chlorascens, Aucuba eriobotryifolia, and Aucuba japonica. Incorporating Aucuba plastomes available in GenBank, a total of seven Aucuba plastomes, representing six out of ten species of Aucuba, were used for comparative plastome analysis, phylogenetic analysis and divergence time estimation in this study. Comparative analyses revealed that plastomes of Aucuba are highly conserved in size, structure, gene content, and organization, and exhibit high levels of sequence similarity. Phylogenetic reconstruction based on 68 plastid protein-coding genes strongly supported the monophyly of Garryales, Garryaceae and Aucuba. Aucuba eriobotryifolia was sister to the other Aucuba species examined, consistent with its unique fused anther locule. The divergence time of Aucuba was estimated to be approximately late Miocene. Extant Aucuba species derived from recent divergence events associated with the establishment of monsoonal climates in East Asia and climatic fluctuations.
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影响因子：
2.5
作者：
Lohse, Marc;Drechsel, Oliver;Bock, Ralph
通讯作者：
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影响因子：
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