团头鲂耐低氧F3的建立及其在低氧环境下的生长差异
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上海海洋大学农业部淡水水产种质资源重点实验室,上海海洋大学农业部淡水水产种质资源重点实验室,上海海洋大学农业部淡水水产种质资源重点实验室,上海海洋大学农业部淡水水产种质资源重点实验室,上海海洋大学农业部淡水水产种质资源重点实验室,上海海洋大学农业部淡水水产种质资源重点实验室

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“十二五”国家科技支撑计划(2012BAD26B00);国家自然科学基金(31572220);上海高校知识服务平台(ZF1206)


Establishment of hypoxia-tolerant F3 generation of Megalobrama amblycephala and their growth performance under long-term hypoxia
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Shanghai Ocean University,,,,,Shanghai Ocean University

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    摘要:

    为了构建团头鲂耐低氧新品种,实验从鄱阳湖引进和挑选野生优良亲本为奠基群体F0,2009年–2011年通过群体选育获得F1,2011年再通过群体选育实现了F1到F2的传代。2012年,以鄱阳湖选育F2亲本和团头鲂“浦江1号” F9亲本为基础,经夏、秋季2次低氧胁迫,筛选出536尾耐低氧能力强的F2亲本,构成团头鲂耐低氧F2。2013年,挑选个体大、体形好的F2亲本(雌鱼50尾、雄鱼48尾)建立了24个F3家系群体(2♀×2♂群体22个、3♀×2♂群体2个),共100个F3家系。对上述F3家系群体进行1龄阶段的低氧胁迫养殖,通过测定相应生长指标和耐低氧性状,共筛选出5个快速生长家系群体(A2、A3、A18、A19和A20)和6个生长较快的家系群体(A4、A6、A17、A25、A27、A28),微卫星分析其分别归属于20个和28个家系。结果显示,团头鲂的生长性能指标与耐低氧性状呈正相关。在1龄阶段长时间低氧胁迫养殖条件下,团头鲂耐低氧F3中耐低氧能力强的家系的体质量显著大于耐低氧能力弱的家系,选育出的团头鲂耐低氧F3家系在2龄阶段同样保持了快速生长特征。本研究旨在建立团头鲂耐低氧F3新品系,以供后续团头鲂耐低氧新品种的选育。

    Abstract:

    On the basis of wild good broodstocks introduced from Poyang Lake (F0 generation), the F1 generation was obtained through population breeding from 2009 to 2011, and the passage from F1 to F2 was realized in 2011 through population breeding. In order to construct hypoxia tolerance strains of M. amblycephala, the Poyang Lake F2 and “Pujiang No.1” F9 broodstocks endured twice hypoxia stress in the summer and autumn in 2012, and 536 survival individuals were constructed as hypoxia-tolerant F2 generation. In 2013, the F2 parents (female 50, male 48) with great body weight and good body-shape were used to establish 24 F3 family groups (22 groups of 2♀×2♂ and 2 groups of 3♀×2♂), a total of 100 F3 families. The 100 F3 families were cultured under hypoxia for one year from the 20th day post-hatching. By measuring the corresponding traits between growth and hypoxia tolerance, five fastest growing family groups (A2, A3, A18, A19 and A20) were selected; microsatellite analysis identified these rapidly growing individuals belonging to 20 families. Additionally, six faster growing groups (A4, A6, A17, A25, A27 and A28) belonging to 28 family were identified. Our results show that the growth performance of M. amblycephala was positively correlated with hypoxia-tolerance. Under long-time hypoxia stress culture at the first-year stage of F3 families, the body weight of the families with strong hypoxia tolerance was significantly higher than that of the families with low hypoxia tolerance. The selected F3 families with hypoxia resistant characteristics still maintained rapid growth rates at 2-year-old stage. The purpose of this study is to establish the hypoxia-tolerant F3 generation for subsequent selection of new good breed of M. amblycephala.

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李福贵,郑国栋,吴成宾,陈杰,蒋霞云,邹曙明.团头鲂耐低氧F3的建立及其在低氧环境下的生长差异[J].水产学报,2018,42(2):236~245

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  • 收稿日期:2017-01-06
  • 最后修改日期:2017-04-11
  • 录用日期:2017-07-17
  • 在线发布日期: 2018-01-22
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