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在Scutellaris组中的Aedes蚊子的物种化模式:线粒体视角

Antsa Rakotonirina^1,2, Catherine Dauga³, Morgane Pol⁴

¹Medical and Veterinary Entomology Unit, Institut Pasteur du Cambodge, Phnom Penh, Cambodia. antsaharivolana@gmail.com.

Scientific reports

|May 13, 2024

概括

艾迪斯蚊子的Scutellaris组在数百万年前因环境变化和宿主多样性而有多样化,而不是人类迁徙. 这项研究阐明了这些重要昆虫载体的进化历史.

科学领域:

昆虫学昆虫学是一门学科.
进化生物学进化生物学
遗传学遗传学是一个

背景情况:

甲虫蚊子的Scutellaris组包括47个物种,甲虫 albopictus是最广泛的.
此前对这一群体的研究主要集中在白虫 (Aedes albopictus) 上,因为它对公共卫生的重要性,忽视了其他物种.
了解整个Scutellaris群的进化历史和遗传多样性对于全面的载体控制策略至关重要.

研究的目的:

为了评估Aedes蚊子Scutellaris组内的遗传多样性.
为了估计这个群体内的各种物种的物种化时间.
研究影响这些蚊子物种进化分歧的因素.

主要方法:

蚊子从亚太地区的不同地点收集.
分析了线粒体细胞染色体c氧化酶子单元1 (cox1) 和子单元3 (cox3) 的基因序列.
对来自21个物种的1849个cox1序列进行了家族遗传学分析,其中包括三个外群物种,以估计分歧时间.

主要成果:

斯库特拉利斯群中的大多数物种化事件都发生在古世和新世时期.
在Scutellaris亚组和Albopictus亚组之间发生了显著的分裂,大约发生在6.4-61亿年前 (MYA).
亚洲/密克罗尼西亚物种和美拉尼西亚/波利尼西亚物种之间存在明显的分歧,可追溯到大约36-35万年前.

结论:

在Scutellaris群中的Aedes物种的物种化似乎受到哺乳动物宿主多样性,气候变化,环境变化和地质事件等因素的影响.
这些发现表明,自然环境和地质动态,而不是仅仅是人类迁徙,已经塑造了这个蚊子群体的进化轨迹.
需要进一步研究未被充分研究的Aedes物种的遗传多样性和进化历史.

关键词:

在Cox1基因中,它属于 Albopictus 亚群.古世纪时期 (Paleogenic period) 是一个古世纪时期.在Scutellaris子组中,

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