3种鲌亚科鱼类全基因组微卫星分布特征分析
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S 917

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浙江省农业(水产)新品种选育重大科技专项(2016C02055-1,2021C02069-3)


Distribution characteristics of microsatellites in the whole genome of three Culterinae species
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    摘要:

    利用MISA软件对3种鲌亚科鱼类全基因组中的完整型微卫星进行了搜索,并对其分布特征及规律进行了分析。结果表明:在翘嘴鲌(Culter alburnus, 1.055 Gb)、浪白鱼(Anabarilius grahami, 1.006 Gb)和团头鲂(Megalobrama amblycephala, 1.116 Gb)全基因组中,分别筛选出772 276、548 726和772 329个完整型微卫星。相对丰度分别为732.0,553.2和691.2个/Mb。微卫星总长度分别为14.29,9.42和15.02 Mb,分别占基因组序列总长度的1.35%,0.94%和1.35%。在1~6个不同碱基重复类型完整型微卫星中,3种鲌亚科鱼类的6种碱基类型数目排序是一致的。均是单碱基重复数目最多,然后依次是二碱基、四碱基、三碱基、五碱基和六碱基。3种鱼三碱基和四碱基重复中数量最多的分别是AAT和AGAT,但在翘嘴鲌二碱基重复中,AT重复微卫星的数量要多于AC重复。3种鱼中不同碱基类型微卫星分布频率随着重复单元拷贝数和长度的增加呈递减趋势,其微卫星重复单元长度主要分布在10~30 bp,分别占微卫星总数的90.54%、94.27%和89.17%。本研究结果可为进一步研究鲌亚科基因组特征提供参考,并为今后进行这3种鱼的分子标记辅助育种及遗传信息评估等工作提供基础资料。

    Abstract:

    In this study, the microsatellite search software MISA was used to search for the perfect microsatellite in the whole genome of three Culterinae species, and its distribution pattern was analyzed. As a result, in the genome of (Culter alburnus,1.055 Gb), (Anabarilius grahami,1.006 Gb), and (Megalobrama amblycephala,1.116 Gb), 772 276, 548 726, and 772 329 perfect microsatellites were screened out, respectively. The relative frequency were 732.0/Mb, 553.2/Mb, and 691.2/Mb, respectively. The total lengths of the microsatellites were 14.29 Mb, 9.42 Mb, and 15.02 Mb, respectively, accounting for 1.35%, 0.94%, and 1.35% of the total length of the genome sequence. Among the complete microsatellites with 1-6 different base repeat types, the orders of 6 base types from the three species of Culterinae were the same. Each had the largest number of mononucleotide repeats, followed by dinucleotide repeats, tetranucleotide repeats, trinucleotide repeats, pentanucleotide repeats, and hexanucleotide repeats. The highest frequency core repeat categories of trinucleotide and tetranucleotide in the three species of fish is AAT and AGAT, respectively. However, the number of AT is more than AC repeat in the dinucleotide of Culter alburnus. The distribution frequency of microsatellites of different base types in the three fish species decreased with the increase of the copy number and length of the repeat units. The length of the microsatellites repeat unit was mainly 10-30 bp, accounting for 90.54%, 94.27%, and 89.17% of the microsatellites, respectively. The results of this study may provide a reference for the further study of Culterinae genome characteristics and contribute basic data for future investigations into molecular marker-assisted breeding and genetic information assessment of 3 Culterinae species.

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刘士力,刘一诺,李飞,郑建波,程顺,蒋文枰,迟美丽,赵金良.3种鲌亚科鱼类全基因组微卫星分布特征分析[J].上海海洋大学学报,2023,32(6):1176-1183.
LIU Shili, LIU Yinuo, LI Fei, ZHENG Jianbo, CHENG Shun, JIANG Wenping, CHI Meili, ZHAO Jinliang. Distribution characteristics of microsatellites in the whole genome of three Culterinae species[J]. Journal of Shanghai Ocean University,2023,32(6):1176-1183.

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  • 收稿日期:2022-10-26
  • 最后修改日期:2022-11-20
  • 录用日期:2023-03-28
  • 在线发布日期: 2023-11-29
  • 出版日期: 2023-11-20
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