在海洋贝Mytilus中,有广泛的父性线粒体DNA遗传的直接证据
E Zouros1, K R Freeman, A O Ball
1Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada.
Nature
|October 1, 1992
概括
在动物中,线粒体DNA (mtDNA) 的遗传通常是母系的. 然而,这项研究揭示了贝的广泛的父亲mtDNA贡献,明显高于以前在老鼠等其他动物中观察到的.
科学领域:
- 进化生物学 进化生物学
- 遗传学 遗传学 是一个
- 海洋生物学 海洋生物学
背景情况:
- 在动物中,线粒体DNA (mtDNA) 的遗传传统上被认为是严格的母性遗传.
- 最近的研究表明,在Drosophila和小鼠中,偶尔发生的父亲mtDNA泄漏,频率非常低 (大约约3倍). 10^-4) 的情况.
- 海Mytilus中异质体个体的高频率一直被认为是双亲mtDNA遗传的证据.
研究的目的:
- 调查海 (Mytilus edulis和Mytilus trossulus) 中父亲mtDNA贡献的程度.
- 为了比较贝类的父性mtDNA遗传频率与其他动物模型中报告的频率.
主要方法:
- 进行了两种物种的配对:Mytilus edulis和Mytilus trossulus.
- 分析后代对母体和父体mtDNA贡献的存在和频率.
主要成果:
- 在Mytilus的内部和跨物种交叉中观察到父亲mtDNA的广泛贡献.
- 中的父系mtDNA贡献数量比以前推断的Drosophila和小鼠高出几个数量级.
结论:
- 这些发现提供了强有力的证据,证明Mytilus.有显著的双亲mtDNA遗传.
- 与其他研究的动物群体相比,贝表现出独特且更高的父性mtDNA传播频率.
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