城市化和距离在Fundulus heteroclitus中形成了人口结构
Jeffrey A Markert1, Matthew T Rock1,2, Bryan W Clark3
1Department of Biological Sciences, Providence College, 1 Cunningham Square, Providence, RI 02918, United States.
概括
新贝德福德港附近的鱼种群已经进化了耐受多二的遗传适应. 污染驱动基因差异化,特别是在调节酸受体系统的基因中.
科学领域:
- 环境毒理学环境毒理学
- 人口遗传学 人口遗传学
- 生态毒理学 生态毒理学
背景情况:
- 新贝德福德港是一个超级基金网站,因20世纪中叶的工业倾倒而受到大量的多二污染.
- 鱼 (Fundulus heteroclitus) 是易受多二的常见鱼类,但一些种群表现出耐受性.
- 亚利碳化合物受体系统与对污染物的适应性耐受性有关.
研究的目的:
- 为了研究木乃伊犬的种群遗传结构与新贝德福德港的污染水平有关.
- 确定与Fundulus heteroclitus中对多双的适应性耐受性相关的遗传位置.
主要方法:
- 对来自马萨诸塞州和罗德岛河口的444只木乃伊犬进行了种群遗传分析.
- 利用55个单核酸多态化 (SNP) 位点来评估遗传变异.
- 污染和清洁的河口地区之间的等位基频率比较.
主要成果:
- 新贝德福德港附近的木乃伊犬种群显示出大量的种群规模和受限制的基因流动.
- 在污染和清洁地点之间,在一个小的地理范围内观察到强烈的遗传差异化.
- 在基碳化合物受体系统内的基因位点的基因频率差异显著推动了这种遗传差异化.
- 在更清洁的息地中,耐污染的等位基因频率较低.
结论:
- Fundulus heteroclitus种群表现出局部适应性基因对多二污染的反应.
- 亚利碳化合物受体系统在木乃伊的污染耐受性演变中发挥着关键作用.
- 遗传差异化突出了环境污染物对当地鱼群的影响.
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