Insights into the Evolution of Neoteny from the Genome of the Asian Icefish Protosalanx chinensis

iScience

Jiwei Qi¹  Meng Liu²  Fanglei Shi³  Jie Zhang³  Huijuan Pan³  Ming Li⁴  Yujie Qu⁵  Huaying Li⁵  Inge Seim⁶  Jinping Chen⁶  Yuepan Geng⁶  Ran Tian⁷ 

[1] Corresponding author;University of Chinese Academy of Sciences, Beijing 100049, China;Chinese Academy of Sciences Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Beijing 100101, China;Guangdong Key Laboratory of Animal Conservation and Resource, Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou 510260, China;Integrative Biology Laboratory, College of Life Sciences, Nanjing Normal University, Nanjing 210046, China;Novogene Bioinformatics Institute, Beijing 100083, China;School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China;

关键词: Biological Sciences;    Evolutionary Biology;    Genomics;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: Salangids, known as Asian icefishes, represent a peculiar radiation within the bony fish order Protacanthopterygii where adult fish retain larval characteristics such as transparent and miniaturized bodies and a cartilaginous endoskeleton into adulthood. Here, we report a de novo genome of Protosalanx chinensis, the most widely distributed salangid lineage. The P. chinensis genome assembly is more contiguous and complete than a previous assembly. We estimate that P. chinensis, salmons, trouts, and pikes diverged from a common ancestor 185 million years ago. A juxtaposition with other fish genomes revealed loss of the genes encoding ectodysplasin-A receptor (EDAR), SCPP1, and four Hox proteins and likely lack of canonical fibroblast growth factor 5 (FGF5) function. We also report genomic variations of P. chinensis possibly reflecting the immune system repertoire of a species with a larval phenotype in sexually mature individuals. The new Asian icefish reference genome provides a solid foundation for future studies.

【 授权许可】

Unknown