浙江农业科学 ›› 2026, Vol. 67 ›› Issue (2): 470-476.DOI: 10.16178/j.issn.0528-9017.20240954

• 蚕桑与特种养殖 • 上一篇    下一篇

厚壳贻贝转录组SSR位点分析与开发应用

邵艳卿1,2(), 方军1,2, 刘一江3, 金涵誉1,2,3, 李腾腾1,2   

  1. 1.浙江省海洋水产养殖研究所,全省近岸生物种质资源保护与利用重点实验室,浙江 温州 325005
    2.中国水产科学研究院 海洋贝类工程技术研究中心,浙江 温州 325005
    3.温州科技职业学院,浙江 温州 325006
  • 收稿日期:2024-12-13 出版日期:2026-02-28 发布日期:2026-03-07
  • 作者简介:邵艳卿,研究方向为水产种质资源和遗传育种。E-mail:amshao@126.com
  • 基金资助:
    温州市科技局项目(Z20170013);国家水产种质资源库项目;浙江省“三农九方”科技协作计划项目(2023SNJ076)

Analysis and development application of SSR locus based on transcriptome sequencing of Mytilus coruscus

SHAO Yanqing1,2(), FANG Jun1,2, LIU Yijiang3, JIN Hanyu1,2,3, LI Tengteng1,2   

  1. 1.Zhejiang Key Laboratory of Coastal Biological Germplasm Resources Conservation and Utilization,Zhejiang Mariculture Research Institute,Wenzhou 325005,Zhejiang
    2.Engineering Research Center for Marine Bivalves,Chinese Academy of Fishery Sciences,Wenzhou 325005,Zhejiang
    3.Wenzhou Vocational College of Science & Technology,Wenzhou 325006,Zhejiang
  • Received:2024-12-13 Online:2026-02-28 Published:2026-03-07

摘要:

为进一步开发适合厚壳贻贝的EST-SSR分子标记,利用转录组序列信息获得了大量SSR位点,并分析了位点信息及群体遗传多样性。结果表明,转录组测序获得134 331条UniGene序列,共检测出15 988个SSR位点,出现频率为11.900%,平均每4.16 kb出现1个SSR位点。完整型SSR位点中共有172种重复基序,其中单核苷酸重复和二核苷酸重复为主要类型,分别占总SSR位点的83.00%和11.22%,以A/T基序(80.91%)和AT/AT基序(7.70%)为主。共设计出31 125对SSR引物,在随机选取的60对引物中有11对表现出多态性,占比18.33%。利用多态性引物分析了厚壳贻贝群体遗传多样性,共检测到39个等位基因,各位点的等位基因数(Na)为3~5个,平均观测杂合度(Ho)、平均期望杂合度(He)和平均多态信息含量(PIC)分别为0.33、0.56和0.48,其中有8个位点极显著(p<0.01)偏离了哈代-温伯格平衡。这些EST-SSR分子标记的开发可为厚壳贻贝的种群遗传研究、亲缘关系、基因连锁、遗传多样性评价等提供有效支撑。

关键词: 厚壳贻贝, 简单序列重复, 转录组

Abstract:

To further develop EST-SSR molecular markers suitable for Mytilus coruscus,a large number of SSR loci were obtained using transcriptome sequence information,and the loci information and population genetic diversity were analyzed. The results showed that a total of 134 331 UniGene sequences were obtained by transcriptome sequencing,with a total of 15 988 SSR loci detected,occurring at a frequency of 11.900%,averaging one SSR locus per 4.16 kb. There were a total of 172 types of repeat motifs in intact SSR loci,among which mononucleotide and dinucleotide repeats were the main types,accounting for 83.00% and 11.22% of the total SSR loci,respectively. The A/T motif(80.91%)and AT/AT motif(7.70%)were the main types. A total of 31 125 pairs of SSR primers were designed,and 11 out of 60 randomly selected primers showed polymorphism,accounting for 18.33%. The genetic diversity of the Mytilus coruscus population was analyzed using polymorphic primers,and a total of 39 alleles were detected. The number of alleles(Na)at each locus was 3-5,and the average observed heterozygosity(Ho),average expected heterozygosity(He),and average polymorphic information content(PIC)were 0.33,0.56,and 0.48,respectively. Among them,8 loci deviated significantly(p<0.01)from Hardy-Weinberg equilibrium. The development of these EST-SSR molecular markers can provide effective support for population genetics,genetic relation,gene linkage analysis,genetic diversity assessment of Mytilus coruscus.

Key words: Mytilus coruscus, simple sequence repeat(SSR), transcriptome

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