伴侣依赖改变了共同进化选择在相互主义中的模式
Mayra C Vidal1, Cong Liu1,2, Shengpei Wang3
1Department of Biology, University of Massachusetts Boston, Boston, MA 02125.
概括
共同进化的动态在选择性和强制性相互之间有所不同. 虽然两者都表现出共同进化,但在选择性相互作用中它更弱,更慢,观察到的特征互补性较少.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 微生物生态学 微生物生态学
背景情况:
- 同进化推动了物种相互作用的多样化,特别是在合作伙伴进化了互补特征的相互主义中.
- 强制性互通主义得到了很好的研究,但比较常见的选择性互通主义,在它们的共同进化动态方面仍然不太了解.
- 对于理解生态多样化和物种持久性来说,理解在选择性相互主义中的共同进化至关重要.
研究的目的:
- 调查可选互通主义中的共同进化动态,并将其与义务互通主义进行比较.
- 评估相互性依赖对共同进化和特征进化的强度和速度的影响.
- 识别基因差异,如单核酸多态 (SNPs),与不同依赖水平的共同进化选择相关.
主要方法:
- 使用合成酵母互惠系统,交换必需的营养素.
- 通过控制环境中的资源可用性来操纵互惠主义依赖.
- 采用时间转移分析,追踪特征进化,并对进化和祖先菌株进行基因定型.
主要成果:
- 同进化在任性和义务互惠主义中都被观察到,但在任性互动中,它显著较弱和较慢.
- 特征互补性演变为义务互惠主义,但不是自愿的互惠主义.
- 强制性互惠公司在积极选择下表现出更多的SNP,而非自愿性互惠公司.
结论:
- 相互性依赖极大地影响了共同进化的强度和特征进化的速度.
- 相互关系中的依赖程度塑造了相互作用物种的进化轨迹.
- 研究结果强调了交互背景在推动进化结果和多样化的重要性.
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