Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (11): 2584-2593.DOI: 10.3969/j.issn.1004-1524.20221569

• Animal Science • Previous Articles     Next Articles

Characteristics and polymorphic markers development of whole genome simple sequence repeat of Opsariichthys bidens

GE Jianhui1,2(), GUAN Wenzhi2, REN Jindong2, NIU Baolong2, HU Jinchun4, WANG Wei1, WENG Xudong5, LOU Bao2, YU Jin3,*(), XU Xiaojun2,*()   

  1. 1. College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, Zhejiang, China
    2. Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    3. Longyou County Breeding Development Center, Longyou 324000, Zhejiang, China
    4. Quzhou Aquatic Technology Promotion Center, Quzhou 324000, Zhejiang, China
    5. Zhejiang Yulaoda Agricultural Science and Technology Company, Quzhou 324000, Zhejiang, China
  • Received:2022-11-04 Online:2023-11-25 Published:2023-12-04

Abstract:

In order to develop polymorphic simple sequence repeat (SSR) markers, the SSR were searched and computed in the genome of Opsariichthys bidens by microsatellite identification tool (MISA). The SSR distribution characteristics were analyzed by bioinformatics methods, and 39 tri-nucleotide loci were selected for primers design and polymorphism detection. The total SSR number detected in the O. bidens genome were 304 870, which accounted for 0.10% of the whole genome length. Di-nucleotide SSR was the dominant repeat type in the genome of O. bidens. The number of 5 SSR repeat types was di->tetra->tri->hexa->penta-nucleotide. The introns had the highest number of SSR, with the number of 93 380, while 5'UTR had the smallest number of SSR, with the number of 622. The order of SSR number of 6 regions was introns>intergenics>promoter>3'UTR>CDS>5'UTR. Tri-nucleotide SSR was the dominant repeat type in coding sequence, but di-nucleotide SSR was the dominant repeat type in the other 5 regions. The repeat number ranged from 5 to 350, mainly distributed in 5 to 30. Fifteen pairs of polymorphic primers were screened, and 106 alleles were detected in a wild population of O. bidens, the observed heterozygosity was 0.125 to 0.813, and the expected heterozygosity was 0.359 to 0.862, the polymorphism information content (PIC) was 0.339 to 0.830, 12 pairs of primers were highly polymorphic (PIC>0.50). These microsatellite markers provided basic data for population genetic diversity and parentage determination of O. bidens.

Key words: Opsariichthys bidens, genome, microsatellite sequence, polymorphism

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