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Chromosome-level genome assembly of the glass catfish(Kryptopterus vitreolus)reveals molecular clues to its transparent phenotype

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Zoological Research 2024年第5期45卷 1027-1036页

作者： Chao bian Rui-Han Li Zhi-Qiang Ruan Wei-Ting Chen Yu Huang Li-Yue Liu Hong-Ling Zhou Cheong-Meng Chong Xi-Dong Mu Qiong Shi Laboratory of Aquatic Genomics College of Life Sciences and OceanographyShenzhen UniversityShenzhenGuangdong 518057China Key Laboratory of Prevention and Control for Aquatic Invasive Alien Species Ministry of Agriculture and Rural AffairsGuangdong Modern.Recreational Fisheries Engineering Technology CenterPearl River Fisheries Research InstituteChinese Academy of Fishery SciencesGuangzhouGuangdong 510380China Shenzhen Key Lab of Marine Genomics Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic AnimalsBGI Academy of Marine SciencesBGI MarineShenzhenGuangdong 518081China CAS Key Laboratory of Mountain Ecological Restoration and bioresource Utilization&Ecological Restoration and biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengduSichuan 610041China School of Life Sciences Jiaying UniversityMeizhouGuangdong 514015China China Zebrafish Resource Center National Aquatic Biological Resource CenterState Key Laboratory of Freshwater Ecology and BiotechnologyInstitute of HydrobiologyChinese Academy of ScienceWuhanHubei 430072China Shenzhen branch Guangdong Laboratory for Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenGuangdong 518116China State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoMacaoMacao 999078China Center for Aquatic Genomics College of Life SciencesNeijiang Normal UniversityNeijiangSichuan 641100China

Glass catfish(Kryptopterus vitreolus)are notable in the aquarium trade for their highly transparent body *** transparency is due to the loss of most reflective iridophores and light-absorbing melanophores in the main body,although certain black and silver pigments remain in the face and *** date,however,the molecular mechanisms underlying this transparent phenotype remain largely *** explore the genetic basis of this transparency,we constructed a chromosome-level haplotypic genome assembly for the glass catfish,encompassing 32 chromosomes and 23344 protein-coding genes,using Pacbio and Hi-C sequencing technologies and standard assembly and annotation *** revealed a premature stop codon in the putative albinism-related tyrp1b gene,encoding tyrosinase-related protein 1,rendering it a nonfunctional ***,a synteny comparison with over 30 other fish species identified the loss of the endothelin-3(edn3b)gene in the glass catfish *** investigate the role of edn3b,we generated edn3b^(−/−)mutant zebrafish,which exhibited a remarkable reduction in black pigments in body surface stripes compared to wild-type *** findings indicate that edn3b loss contributes to the transparent phenotype of the glass *** high-quality chromosome-scale genome assembly and identification of key genes provide important molecular insights into the transparent phenotype of glass *** findings not only enhance our understanding of the molecular mechanisms underlying transparency in glass catfish,but also offer a valuable genetic resource for further research on pigmentation in various animal species.

关键词： Glass catfish Whole-genome sequencing edn3b−/−mutant Transparent phenotype

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