The most reliable fish system evolution tree to date has been announced

May 14, 2018, the Fish-T1K project, jointly launched by the Great Oceans and National Gene Bank of China, officially announced the construction of the most reliable fish system evolution tree to date, the results of which were published in the latest issue of
. This fish "tree of life" answers the long-standing disputes and difficulties in the study of fish origin and evolution, and is a landmark event in the history of fish evolution.
also involved in the work, including George Washington University in the United States, the Smithsonian's Museum and the Singapore Science and Technology Research Council. Huang Yu, a ph.D. student at Huada Ocean 2017, is the co-first author of the paper, and his mentor, Professor Shi Qiong, vice president and chief scientist of Huada Ocean, is the co-author of the paper.
fish meat is delicious, nutritious, affordable, is an important source of animal protein. As an ancient and species-rich vertebrate group, fish account for more than half of all vertebrates. At least 33,900 species of fish have been found so far, according to the FishBase database. By constructing the "tree of life" of fish and analyzing the evolutionary history of fish, we can find the evolution law of fish evolution, reveal the causes behind the rich species diversity of fish, and lay a solid foundation for the protection and rational development and utilization of fish species.
Fish-T1K team carefully selected 303 fish species from different classification units for the entire fish, including 66 of the 72 species of hard-bone fish, representing 91.66 percent of the total classification unit. Big Data integrates genomic data from 144 species of fish and transcription group data from 159 species of fish, uses new biometric analysis methods, screens 1,105 directly congenerous exon sequences as molecular markers, and builds the most reliable fish system evolution tree to date.The "tree of life" solves many of the long-disputed problems of the evolution of fish classification units, involving the original origin group of hard-bone fish, the evolution of boneseed and silver-man fish, as well as the ownership of the sister groups of real bone fish, ratchet fins, and mackerel-shaped total purposes. At the same time, advanced statistical analysis methods prove that the structure of the evolutionary tree is very stable, is currently the most extensive and reliable fish "tree of life." In addition, the Fish-T1K team used these histological data and combined the time of the emergence of multiple fish fossils to effectively estimate the origin time of different fish groups. The results show that the vast majority of existing fish stocks formed long before the end of the Cretaceous period, with the earliest of these groups originating 379 million years ago.
this study has made a major breakthrough in many ways. First, it produced transcriptional group data for 131 species, greatly expanding the current fish histological data base. Second, the largest fish histological data set to date was assembled and statistically tested to solve many outstanding problems in the origin and evolution of fish. Finally, the 1105 molecular marker fragments identified and developed in this study can also provide a reference for building an all-fish evolutionary tree in the future.
relationship is the basis of our understanding of the origin and evolution of life. The construction of the "tree of life" of fish, let us better understand the genetic evolution mechanism of fish, species diversity and its ecological importance, provide scientific guidance for species diversity and the protection of endangered species, will also lay an important scientific foundation for marine ecological environment protection, economic species breeding, human health and other research.
it is understood that the Fish-T1K project was established in November 2013 to sequence and analyze transcriptomes of 1,000 species of fish and decrypt scientific issues such as their origin, evolution, reproduction, development, and immunity. At present, the project has successfully attracted the active participation of more than 20 scientific institutions from 7 countries, completed the transcription group sequencing and assembly of more than 200 species of hard bone fish, successfully built the world's first large-scale fish transcription group database, for basic research and applied research in fish to provide big data support. In May 2016, the Fish-T1K Project White Paper was published in the Journal of GigaScience, detailing the project's research content, technical path and phased results.all transcription group data from Fish-T1K has now been uploaded to the NCBI's SRA database, as well as backed up and shared on fish-T1K's official website. Next, the Fish-T1K Global Partnership will continue its efforts towards the stage of completing the transcriptional sequencing and analysis of 1,000 species of fish, and conduct a series of sub-topic studies while further analyzing the systematic developmental relationships of fish subgroups and fully understanding the evolutionary mechanisms of fish diversity. For example, the use of these data, mining new fish toxin peptides and explore their potential medicinal value, explore the fish sea-freshwater adaptive mechanism, fish growth control mechanism and so on. At present, some sub-topics have made breakthrough progress. The large amount of histological data generated by the Fish-T1K project and the scientific issues it illustrates will greatly accelerate the process of basic scientific research on fish and contribute to industrial and medical applications such as aquatic molecular breeding and marine drug research and development.
recently, Genomics, an international academic journal, has set up a special issue of Fish-T1K to support and promote the application and promotion of fish-T1K projects. (Source: Science.com)