Stout camphor tree genome fills gaps in understanding of flowering plant genome evolution
Stout camphor tree genome fills gaps in understanding of flowering plant genome evolution
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DOI：
10.1038/s41477-018-0337-0
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发表时间：
2019-01-01
期刊：
影响因子：
18
通讯作者：
Tsai, Isheng J.
中科院分区：
文献类型：
--
作者：
Chaw, Shu-Miaw;Liu, Yu-Ching;Tsai, Isheng J.
我们提供了粗壮的樟树(Cinnamomum Kanehirae)的参考质量的基因组组装和注释，它是木兰科的第一个测序成员，包括四个目(Laurales，Magnoliales，Canellales和Piperales)和9000多个物种。13个有代表性的种子植物基因组的系统学分析表明，木兰科和优树科比单子叶植物具有更近的共同祖先。在木兰科的谱系中推测了两个全基因组重复事件：一个在樟目和木兰目分化之前，另一个在樟科中。小规模的分段复制和串联复制也促进了肉桂属进化史上的创新。例如，劳拉目中萜类合成酶基因亚家族的扩展导致了肉桂属单萜和倍半萜的多样性。
We present reference-quality genome assembly and annotation for the stout camphor tree (Cinnamomum kanehirae (Laurales, Lauraceae)), the first sequenced member of the Magnoliidae comprising four orders (Laurales, Magnoliales, Canellales and Piperales) and over 9,000 species. Phylogenomic analysis of 13 representative seed plant genomes indicates that magnoliid and eudicot lineages share more recent common ancestry than monocots. Two whole-genome duplication events were inferred within the magnoliid lineage: one before divergence of Laurales and Magnoliales and the other within the Lauraceae. Small-scale segmental duplications and tandem duplications also contributed to innovation in the evolutionary history of Cinnamomum. For example, expansion of the terpenoid synthase gene subfamilies within the Laurales spawned the diversity of Cinnamomum monoterpenes and sesquiterpenes.