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Maternal effects on egg quality in hatchery, wild, and farmed Chinook salmon (Oncorhynchus tshawytscha)

机译：产妇对孵化场，野生和人工养殖的​​奇努克鲑鱼卵质量的影响（Oncorhynchus tshawytscha）

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摘要

Maternal effects have received considerable attention within the literature, however our knowledge on environmental and genetic maternal effects on egg quality in fish still remains limited. I examined both environmental and genetic maternal effects on egg quality traits in hatchery, wild and farmed Chinook salmon (Oncorhynchus tshawytscha). I found that environmental differences during early life altered certain aspects of the reproductive biology in hatchery- and wild- salmon, namely gonad and egg development, while other important components of egg quality, fatty acid profile, were not affected. By using quantitative genetic models and breeding designs, I determined that egg size was strongly influenced by maternal genetic effects and was heritable across families. Together, these results suggest that differences in early- rearing environment and associated selection pressures during early life can alter critical life history traits in adults, as a result of both environmental and genetic maternal effects.
机译：在文献中，产妇效应受到了相当大的关注，但是我们对环境和遗传产妇对鱼类卵品质的影响的知识仍然有限。我检查了环境和遗传母体对孵化场，野生和养殖的奇努克鲑鱼（Oncorhynchus tshawytscha）卵品质性状的影响。我发现，早期生活中的环境差异改变了孵化场和野生鲑鱼生殖生物学的某些方面，即性腺和卵的发育，而卵质量的其他重要组成部分，脂肪酸谱却没有受到影响。通过使用定量遗传模型和育种设计，我确定卵的大小受母体遗传效应的强烈影响，并且可以在整个家庭中遗传。总之，这些结果表明，由于环境和遗传对母体的影响，成年早期的饲养环境差异和相关的选择压力会改变成年人的关键生命史特征。

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    Haring Michaela Whitney;

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  • 年度 2015
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