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Comparative phylogeographic patterns and processes of the incipient brown seaweeds Sargassum polycystum and S. plagiophyllum around the Thai-Malay Peninsula

文献类型：期刊论文

作者Zhang, Tong-Yun3; Wang, Qi-Qi3; Sun, Zhong-Min2; Draisma, Stefano G. A.1; Hu, Zi-Min3
刊名FRONTIERS IN PLANT SCIENCE
出版日期2025-09-17
卷号16页码:14
关键词genetic admixture long-distance dispersal ocean current incipient speciation phylogeographic diversity sea-level fluctuation
ISSN号1664-462X
DOI10.3389/fpls.2025.1673650
通讯作者Draisma, Stefano G. A.(sgadraisma@yahoo.com) ; Hu, Zi-Min(huzimin9712@163.com)
英文摘要Incipient (recently-evolved) species are morphologically distinct and have a relatively short evolutionary history from a common ancestor, yet comparative phylogeographic patterns of incipient seaweed species have seldom been explored. Here, we created 339 mitochondrial cox1, 339 cox3, 339 cox1+cox3 and 286 nuclear ITS2 sequences for Sargassum plagiophyllum (10 populations) and 326 cox1, 336 cox3, 310 cox1+cox3 and 341 ITS2 sequences for S. polycystum (14 populations) around the Thai-Malay Peninsula (TMP), with the aim to explore potential drivers in shaping population genetic structuring and diversity over space, including a phylogeographic signature of incipient speciation. Comparative analysis showed that the two Sargassum species around the TMP diverged from their most recent common ancestor at c. 0.17 Mya, followed by a demographic expansion at c. 0.015-0.060 Mya. Oceanic currents drove contemporary continuous south-to-north gene flow in the Malacca Strait, leading to most genetic variation partitioned within populations and among populations within groups. Interestingly, the incipient S. polycystum and S. plagiophyllum shared their most common haplotypes/ribotypes, and mitochondrial datasets revealed much higher phylogeographic diversity in S. polycystum than in S. plagiophyllum. These results imply that the late Quaternary sea-level fluctuations and contemporary oceanic currents co-contributed to population genetic structuring and demographic histories of S. polycystum and S. plagiophyllum around the TMP. Importantly, comparative phylogeographic analysis of S. polycystum and S. plagiophyllum shed lights on the existence of a few separate late Pleistocene glacial refugia, such as the Andaman Sea for S. plagiophyllum and the northern Malacca Strait for S. polycystum, particularly the revealing of important signatures of their incipient speciation.
WOS关键词MARINE GLACIAL REFUGIUM ; GENETIC-STRUCTURE ; ALGA SARGASSUM ; OCEANIC CURRENTS ; SOUTHEAST-ASIA ; POPULATION ; PHAEOPHYCEAE ; SEA ; DIVERSITY ; WEST
资助项目National Natural Science Foundation of China[32371697] ; Thailand Research Fund[RDG6130002] ; Outstanding Talent Program at Yantai University
WOS研究方向Plant Sciences
语种英语
WOS记录号WOS:001584664900001
出版者FRONTIERS MEDIA SA
源URL[http://ir.qdio.ac.cn/handle/337002/203461]  
专题海洋研究所_海洋生物分类与系统演化实验室
通讯作者Draisma, Stefano G. A.; Hu, Zi-Min
作者单位1.Prince Songkla Univ, Fac Sci, Excellence Ctr Biodivers Peninsular Thailand, Hat Yai, Songkhla, Thailand
2.Chinese Acad Sci, Inst Oceanol, Lab Marine Organism Taxon & Phylogeny, Qingdao, Peoples R China
3.Yantai Univ, Sch Ocean, Yantai, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Tong-Yun,Wang, Qi-Qi,Sun, Zhong-Min,et al. Comparative phylogeographic patterns and processes of the incipient brown seaweeds Sargassum polycystum and S. plagiophyllum around the Thai-Malay Peninsula[J]. FRONTIERS IN PLANT SCIENCE,2025,16:14.
APA Zhang, Tong-Yun,Wang, Qi-Qi,Sun, Zhong-Min,Draisma, Stefano G. A.,&Hu, Zi-Min.(2025).Comparative phylogeographic patterns and processes of the incipient brown seaweeds Sargassum polycystum and S. plagiophyllum around the Thai-Malay Peninsula.FRONTIERS IN PLANT SCIENCE,16,14.
MLA Zhang, Tong-Yun,et al."Comparative phylogeographic patterns and processes of the incipient brown seaweeds Sargassum polycystum and S. plagiophyllum around the Thai-Malay Peninsula".FRONTIERS IN PLANT SCIENCE 16(2025):14.

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来源：海洋研究所

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