一种致病寄生虫及其宿主中的共类地质结构
Elizabeth Faye Weatherup1,2, Ryan Carnegie1, Allan E Strand3
1Virgina Institute of Marine Science, William & Mary, Gloucester Point, VA, USA.
Parasitology
|May 21, 2024
概括
基因型测序揭示了墨西哥湾和大西洋中部之间的东部 (Crassostrea virginica) 和它们的寄生虫 (Perkinsus marinus) 的显著遗传差异. 这表明区域间的适应性有限,并警告不转移物种.
科学领域:
- 生态学和进化生物学.
- 水产养殖和水产保护
- 基因组学和人口遗传学
背景情况:
- 宿主-寄生虫相互作用在生态和保护方面至关重要.
- 东部 (Crassostrea virginica) 在经济上很重要,但受到Perkinsus marinus (皮肤病) 的威胁.
- 基因型测序提供了一种经济有效的方法来研究进化历史和共同进化.
研究的目的:
- 调查东部及其寄生虫Perkinsus marinus的空间种群遗传结构.
- 通过基因型测序来评估Crassostrea virginica和Perkinsus marinus之间的共同进化过程.
- 评估不同海洋盆地的基因差异化.
主要方法:
- 限制性位点相关DNA测序 (RADseq) 用于同时分析宿主和寄生虫基因组.
- 在Crassostrea virginica (52,100个SNP) 和Perkinsus marinus (393个SNP) 两种类型中都发现了单核酸多态 (SNP).
- 从墨西哥湾和大西洋中部海岸线的36只中收集了样本.
主要成果:
- 在墨西哥湾和大西洋中部种群之间发现了对宿主和寄生虫的统计学上显著的遗传差异.
- 在大西洋中部观察到宿主 (切萨皮克湾与外海岸) 的遗传分歧,但不是寄生虫.
- 同系遗传学分析证实了宿主和寄生虫之间在大型空间尺度上的显著结合进化变化.
结论:
- 海洋盆地之间的强烈遗传差异表明和寄生虫对不同区域基因型的适应性有限.
- 建议在大西洋和墨西哥湾地区之间转移和寄生虫时保持谨慎.
- RADseq是一个强大的工具,用于揭示空间遗传分歧模式,表明宿主-寄生虫系统的结合进化.
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