尽管有共同的交配场所,生态差异:基因型和共生型揭示了黑豆虫物种复杂中的神秘多样性
Elena Gimmi1,2, Jesper Wallisch3, Christoph Vorburger3,4
1Department of Aquatic Ecology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland. gimmielena@gmail.com.
Heredity
|May 14, 2024
概括
黑豆 (Aphis fabae) 的遗传集群尽管共享交配,但显示出差异化,表明生殖隔离机制是活跃的. 这些虫种群保持与宿主植物相关的独特遗传特征.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 遗传学 是一个遗传学.
背景情况:
- 以不同的宿主植物为食的植物食昆虫面临着不同的选择,可能导致专门的宿主种族.
- 黑豆 (Aphis fabae) 综合体包括具有独特宿主偏好的神秘类型,但在共享的冬季宿主中发生交配,从而允许基因流动.
- 在A. fabae中,宿主和伴侣选择脱引发了有关宿主相关群体中生殖隔离的问题.
研究的目的:
- 研究与不同宿主植物相关的Aphis fabae种群的遗传结构和繁殖隔离.
- 为了确定A. fabae种群之间的基因流和差异化程度,利用各种夏季和冬季宿主.
主要方法:
- 从不同宿主植物和地点收集的A. fabae种群中分析微卫星基因型.
- 基因定型包括来自冬季宿主 (Euonymus europaeus和其他人) 和14个夏季宿主的样本.
- 评估遗传集群差异化和与宿主植物使用和内生生物频率的关联.
主要成果:
- 确定了A. fabae的多个,高度差异化的遗传集群.
- 这些群体与特定的夏季和冬季宿主有着明显的关联.
- 在集群之间观察到遗传性内生体频率的差异和偶尔杂交的证据.
结论:
- 尽管有共同的交配息地,但A. fabae类别之间的遗传差异化是通过生殖前和生殖后障碍物保持的,包括对杂交物的选择.
- 不同宿主植物上的生态选择有助于A. fabae种群的分歧.
- 这些发现支持了植物食昆虫宿主种族进化的概念,即使有基因流动的机会.
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