The American Paddlefish Genome Provides Novel lnsignts into Chromosomal Evolution and Bone Mineralization in Early Vertebrates

文献类型： 外文期刊

第一作者： Cheng, Peilin

作者： Cheng, Peilin;Du, Hao;Li, Chuangju;Ye, Huan;Zhang, Hui;Wu, Jinming;Wang, Chengyou;Ruan, Rui;Wei, Qiwei;Huang, Yu;Lv, Yunyun;Ruan, Zhiqiang;Li, Yanping;Bian, Chao;You, Xinxin;Xu, Junming;Shi, Qiong;Lv, Yunyun;Li, Yanping;Shi, Chengcheng;Han, Kai;Shi, Qiong

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关键词： American paddlefish; sturgeon and paddlefish; early vertebrates; whole-genome duplication; chromosome evolution; bone mineralization

期刊名称：MOLECULAR BIOLOGY AND EVOLUTION （ 影响因子：16.24； 五年影响因子：18.67 ）

ISSN： 0737-4038

年卷期： 2021 年 38 卷 4 期

页码：

收录情况： SCI

摘要： Sturgeons and paddlefishes (Acipenseriformes) occupy the basal position of ray-finned fishes, although they have cartilaginous skeletons as in Chondrichthyes. This evolutionary status and their morphological specializations make them a research focus, but their complex genomes (polyploidy and the presence of microchromosomes) bring obstacles and challenges to molecular studies. Here, we generated the first high-quality genome assembly of the American paddlefish (Polyodon spathula) at a chromosome level. Comparative genomic analyses revealed a recent species-specific whole-genome duplication event, and extensive chromosomal changes, including head-to-head fusions of pairs of intact, large ancestral chromosomes within the paddlefish. We also provide an overview of the paddlefish SCPP (secretory calciumbinding phosphoprotein) repertoire that is responsible for tissue mineralization, demonstrating that the earliest flourishing of SCPP members occurred at least before the split between Acipenseriformes and teleosts. In summary, this genome assembly provides a genetic resource for understanding chromosomal evolution in polyploid nonteleost fishes and bone mineralization in early vertebrates.

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