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Zhang Jian,Zhang Xiaowen,Han Wentao,Fan Xiao,Wang Yitao,Xu Dong,Zhang Yan,Ma Jian,Liang Chengwei,Ye Naihao. 2020. Identification of genes under positive selection reveals evolutionary adaptation of Ulva mutabilis. Acta Oceanologica Sinica, 39(10):35-41
易变石莼的正选择基因挖掘及环境适应性进化机制解析
Identification of genes under positive selection reveals evolutionary adaptation of Ulva mutabilis
Received:September 05, 2019  
DOI:10.1007/s13131-020-1658-1
中文关键词:  绿藻  易变石莼  正选择  适应性进化
英文关键词:green algae  Ulva mutabilis  positive selection  adaptive evolution
基金项目:
Author NameAffiliationE-mail
Zhang Jian College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China 
 
Zhang Xiaowen Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
Function Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China 
 
Han Wentao Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China  
Fan Xiao Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China  
Wang Yitao Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China  
Xu Dong Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China  
Zhang Yan Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China  
Ma Jian Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China  
Liang Chengwei College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao 266042, China liangchw117@126.com 
Ye Naihao Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
Function Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China 
yenh@ysfri.ac.cn 
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中文摘要:
      浒苔是研究生长、发育和环境适应性进化的最具吸引力的模式物种,也是食品、能源和高附加值化合物开发的潜在来源。浒苔的快速生长的特性使它们成为沿海生物地球化学循环的重要贡献者,但同时它们形成的绿潮和生物淤积也会造成严重的环境问题。到目前为止,石莼属中只有易变石莼(Ulva mutabilis)完成了基因组测序。为了进一步了解析石莼属绿藻的进化机制,我们分析了来自易变石莼U. mutabilis, 莱茵衣藻Chlamydomonas reinhardtii和团藻Volvox carteri三个物种的3905个单拷贝同源基因,最终在易变石莼中获得了63个受到正选择的同源基因。进一步的功能分析显示,这些正选择基因参与了光合作用、氨基酸和蛋白质合成、信号转导途径以及压力响应,这也为石莼属绿藻的快速生长及沿海环境适应性提供了证据。
英文摘要:
      Ulvophytes are attractive model systems for understanding the evolution of growth, development, and environmental stress responses. They are untapped resources for food, fuel, and high-value compounds. The rapid and abundant growth of Ulva species makes them key contributors to coastal biogeochemical cycles, which can cause significant environmental problems in the form of green tides and biofouling. Until now, the Ulva mutabilis genome is the only Ulva genome to have been sequenced. To obtain further insights into the evolutionary forces driving divergence in Ulva species, we analyzed 3 905 single copy ortholog family from U. mutabilis, Chlamydomonas reinhardtii and Volvox carteri to identify genes under positive selection (GUPS) in U. mutabilis. We detected 63 orthologs in U. mutabilis that were considered to be under positive selection. Functional analyses revealed that several adaptive modifications in photosynthesis, amino acid and protein synthesis, signal transduction and stress-related processes might explain why this alga has evolved the ability to grow very rapidly and cope with the variable coastal ecosystem environments.
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