基于转录组测序的大口黑鲈驯食相关SNP开发及其与生长性状的关联分析
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中国水产科学研究院珠江水产研究所,中国水产科学研究院珠江水产研究所,中国水产科学研究院珠江水产研究所,中国水产科学研究院珠江水产研究所,中国水产科学研究院珠江水产研究所,中国水产科学研究院珠江水产研究所

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中国水产科学研究院基本科研业务费专项(2017HY-ZC04);国家自然科学基金(31001107);广东省公益研究与能力建设专项(2017A0303002)


Development of SNPs related to bait domestication based on largemouth bass (Micropterus salmoides) transcriptome and association analysis with growth traits
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Pearl River Fisheries Research Institute,Key Laboratory of Tropical and Subtropical Fish Breeding and Cultivation,Chinese Academy of Fishery Sciences,Pearl River Fisheries Research Institute,Key Laboratory of Tropical and Subtropical Fish Breeding and Cultivation,Chinese Academy of Fishery Sciences,Pearl River Fisheries Research Institute,Key Laboratory of Tropical and Subtropical Fish Breeding and Cultivation,Chinese Academy of Fishery Sciences,Pearl River Fisheries Research Institute,Key Laboratory of Tropical and Subtropical Fish Breeding and Cultivation,Chinese Academy of Fishery Sciences,Pearl River Fisheries Research Institute,Key Laboratory of Tropical and Subtropical Fish Breeding and Cultivation,Chinese Academy of Fishery Sciences,Pearl River Fisheries Research Institute,Key Laboratory of Tropical and Subtropical Fish Breeding and Cultivation,Chinese Academy of Fishery Sciences

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    摘要:

    大口黑鲈为肉食性鱼类,传统养殖过程中使用大量的冰鲜鱼为饵料,冰鲜鱼的使用不仅增加了养殖成本,而且多余的冰鲜鱼残饵还会给环境带来严重的污染。为了保护环境并降低养殖成本必须减少冰鲜鱼的使用量,本实验以选育适合人工配合饲料饲喂大口黑鲈为研究目标,用人工配合饲料作为饵料驯化大口黑鲈幼鱼,在驯食后14和16 d,测定其体质量、全长、体高等生长指标。同时在大口黑鲈转录组测序分析获得的SNP位点中,选择其所在序列的基因功能与能量代谢有相关性的7个SNP位点进行SNaPshot分型,用SPSS 19.0进行卡方分析标记与生长性状的相关性。结果发现,序列Unigene031044中的C1332G位点、Unigene085384中的A741G位点和Unigene022319中的A284G位点在体质量、全长及体高性状上存在显著差异。这3个SNP位点所在的基因经预测分别与雌二醇17β脱氢酶12B (hsd17b12b)基因、长链酰基辅酶A合成酶家族成员1(acsl1)基因和琥珀酸脱氢酶组装因子2(sdhaf2)基因具有很高的同源性,推测上述3个SNP位点的变异可能影响了基因表达产物对脂肪酸代谢或三羧酸循环的调节功能,与大口黑鲈对人工配合饲料的利用能力存在密切的相关性。本研究筛选得到的与驯食相关的SNP位点为大口黑鲈功能基因多态性的进一步研究,及加快大口黑鲈食性改良与驯化育种的遗传研究提供了科学的参考依据。

    Abstract:

    Micropterus salmoides is a species of carnivorous teleost. Annually, a large amount of forage fish were used as food for M. salmoides. The residual forage fish not only increase the culture costs, but also pollute environment seriously. In order to protect the environment and cut down culture costs, it is necessary to breed the strain which can digest and absorb formulated feed efficiently to reduce the utilization of forage fish. In this study, for promoting selective breeding of the M. salmoides strain suitable for formulated feeds, bait domestication was carried out in juvenile M. salmoides of breeding group and non-breeding guoup. On the 14th day and the 16th day after bait domestication, the growth traits including body weight, total length and body height were measured. At the same time, seven candidate Unigenes related to energy metabolism with SNPs were selected from the transcriptome of M. salmoides. The SNP sites were genotyped by using of SNaPshot in a bulked segregate analysis (BSA) population with 129 minimax individuals, and the association analysis between genotypes and growth traits were detected. After analysis by using of SPSS 19.0 software, the results showed that, among the seven SNP sites, C1332G in Unigene031044, A741G in Unigene085384, A284G in Unigene022319, were significantly associated with body weight, full length and body height. By BLAST analysis, Unigene031044, Unigene085384 and Unigene022319 were predicted as hydroxysteroid 17-beta dehydrogenase 12-B (hsd17b12b), Acyl-CoA synthetase long-chain family member 1 (acsl1) and Succinate dehydrogenase complex assembly factor 2 (sdhaf2). The results indicated that the SNP sites in above three genes probably play the roles of regulating lipid metabolism and three carboxylic acid cycle, and help M. salmoides to improve the capacity to digest, absorb and utilize formulated feed. The current three SNPs can be used as candidate markers for breeding M. salmoides suitable for formulated feeds.

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马冬梅,全迎春,樊佳佳,胡婕,白俊杰,刘浩.基于转录组测序的大口黑鲈驯食相关SNP开发及其与生长性状的关联分析[J].水产学报,2018,42(11):1684~1692

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  • 收稿日期:2017-10-01
  • 最后修改日期:2017-12-05
  • 录用日期:2018-03-04
  • 在线发布日期: 2018-11-08
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