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Phylogeny and genetic variations of the three genome compartments in haptophytes shed light on the rapid evolution of coccolithophores

文献类型： 外文期刊

作者： Yang, Penghao 1 ; Guo, Kangning 2 ; Yang, Yuqing 1 ; Lyu, Mingjie 4 ; Liu, Jingwen 5 ; Li, Xiaobo 2 ; Feng, Yanlei 2 ;

作者机构： 1.Fudan Univ, Shanghai 200433, Peoples R China

2.Westlake Univ, Sch Life Sci, Key Lab Growth Regulat & Translat Res Zhejiang Pro, Hangzhou 310030, Zhejiang, Peoples R China

3.Westlake Inst Adv Study, Inst Biol, Hangzhou 310024, Zhejiang, Peoples R China

4.Tianjin Acad Agr Sci, Inst Crop Germplasm & Biotechnol, Tianjin 300380, Peoples R China

5.Jimei Univ, Coll Ocean Food & Biol Engn, Xiamen 361021, Peoples R China

关键词： Haptophytes; Coccolithophores; Emiliania huxleyi; Phylogeny; Genome; Evolution

期刊名称：GENE （ 影响因子：3.5； 五年影响因子：3.3 ）

ISSN： 0378-1119

年卷期： 2023 年 887 卷

页码：

收录情况： SCI

摘要： Haptophyte algae, including coccolithophores, play key roles in global carbon cycling and ecosystem. They exhibit exceptional morphological and functional diversity. However, their phylogeny is mostly based on short markers and genome researches are always limited to few species, hindering a better understanding about their evolution and diversification. In this study, by assembling 69 new plastid genomes, 65 new mitochondrial genomes, and 55 nuclear drafts, we systematically analyzed their genome variations and built the most comprehensive phylogenies in haptophytes and Noelaerhabdaceae, with the latter is the family of the model coccolithophore Emiliania huxleyi. The haptophyte genomes vary significantly in size, gene content, and structure. We detected phylogenetic incongruence of Prymnesiales between genome compartments. In Noelaerhabdaceae, by including Reticulofenestra sessilis and a proper outgroup, we found R. sessilis was not the basal taxon of this family. Noelaerhabdaceae strains have very similar genomic features and conserved sequences, but different gene content and dynamic structure. We speculate that was caused by DNA double-strand break repairs. Our results provide valuable genetic resources and new insights into the evolution of haptophytes, especially coccolithophores.

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