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Evolution of Complex Thallus Alga: Genome Sequencing of Saccharina japonica

文献类型： 外文期刊

作者： Liu, Tao 1 ; Wang, Xumin 2 ; Wang, Guoliang 3 ; Jia, Shangang 5 ; Liu, Guiming 6 ; Shan, Guangle 4 ; Chi, Shan 1 ; Zhang, 1 ;

作者机构： 1.Ocean Univ China, Coll Marine Life Sci, Qingdao, Shandong, Peoples R China

2.Yantai Univ, Coll Life Sci, Yantai, Peoples R China

3.Chinese Acad Sci, Beijing Inst Genom, CAS Key Lab Genome Sci & Informat, Beijing Key Lab Genome & Precis Med Technol, Beijing, Peoples R China

4.Univ Chinese Acad Sci, Beijing, Peoples R China

5.China Agr Univ, Coll Grassland Sci & Technol, Beijing, Peoples R China

6.Beijing Acad Agr & Forestry Sci, Beijing Agrobiotechnol Res Ctr, Beijing, Peoples R China

7.Qingdao Haide Blue Tek Biotechnol Co Ltd, Qingdao, Shandong, Peoples R China

8.Qilu Univ Technol, Shandong Acad Sci, Coll Biol Engn, Jinan, Shandong, Peoples R China

9.Fujian Normal Univ, Publ Serv Platform Industrializat Dev Technol Mar, State Ocean Adm, Coll Life Sci, Fuzhou, Fujian, Peoples R China

关键词： Saccharine japonica; genome sequencing; virus genome; phylogenetic analysis; extracellular components; halogen biosynthesis

期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.599； 五年影响因子：4.888 ）

ISSN： 1664-8021

年卷期： 2019 年 10 卷

页码：

收录情况： SCI

摘要： Saccharina, as one of the most important brown algae (Phaeophyceae) with multicellular thallus, has a very remarkable evolutionary history, and globally accounts for most of the economic marine aquaculture production worldwide. Here, we present the 580.5 million base pairs of genome sequence of Saccharina japonica, whose current assembly contains 35,725 protein-coding genes. In a comparative analysis with Ectocarpus siliculosus, the integrated virus sequence suggested the genome evolutionary footprints, which derived from their co-ancestry and experienced genomic arrangements. Furthermore, the gene expansion was found to be an important strategy for functional evolution, especially with regard to extracelluar components, stress-related genes, and vanadium-dependent haloperoxidases, and we proposed a hypothesis that gene duplication events were the main driving force for the evolution history from multicellular filamentous algae to thallus algae. The sequenced Saccharina genome paves the way for further molecular studies and is useful for genome-assisted breeding of S. japonica and other related algae species.

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