在引入的佛罗里达甘青中,复杂的范围扩张和选择性制度
Cinnamon S Mittan-Moreau1,2, Daryl Trumbo3, Kelly R Zamudio4,5
1Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA. cinnamon.mittan@gmail.com.
Heredity
|February 6, 2026
概括
侵袭性甘青,Rhinella horribilis,可能在佛罗里达州有一个单一的引入事件. 范围广泛的基因流动有助于其适应较冷的气候,保持遗传多样性和适应能力.
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 遗传学 是一个
背景情况:
- 引入的物种为范围扩张过程提供了洞察力.
- 甘 (Rhinella marina) 是入侵研究的模型,但它的亲属,佛罗里达州的Rhinella horribilis不太了解.
- 佛罗里达州的气候比Rhinella horribilis的本土范围更冷.
研究的目的:
- 调查佛罗里达州里尼拉可怕菌的引入历史.
- 描述人口结构,遗传多样性和适应性.
- 确定与气候相关的遗传变异,并探索分散的潜在演变.
主要方法:
- 使用双消化限制相关的DNAseq (ddRAD) 对280个人的测序.
- 测试引入假设 (单个与多个事件).
- 通过冗余分析分析人口结构,遗传多样性,基因流动和气候相关的遗传变异.
- 评估分布进化的形态特征 (四肢长度).
主要成果:
- 证据支持佛罗里达州的一个单一引入事件,用于Rhinella horribilis.
- 观察到复杂的范围扩张与范围广泛的基因流动以及因距离或环境而缺乏隔离.
- 没有证据表明在范围边缘的分散表型.
- 确定了与降水,温度和城市化梯度相关的选择.
- 与气候相关的遗传变异表明适应温带环境.
结论:
- 广泛的基因流动对于在入侵性种群中保持遗传多样性和适应能力至关重要.
- 由于遗传多样性和基因流动,Rhinella horribilis成功地适应并建立在佛罗里达州温带环境中.
- 这项研究强调了引入历史和持续基因流动在入侵物种成功中的重要性.
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