重新回顾四个Hexapoda类:Protura作为所有其他六足动物的姐妹群
Shiyu Du1,2, Erik Tihelka2,3, Daoyuan Yu4
1Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
概括
遗传学分析显示,头 (Protura) 是最早的六足动物血统,挑战了以前的假设. 这一发现澄清了昆虫的进化及其地球化,并得到了多种证据的支持.
科学领域:
- * 进化生物学 进化生物学
- * 动物学 动物学
- * 人类遗传学
背景情况:
- * 昆虫是最多样化的动物群,但它们在Hexapoda类中的早期进化关系仍然存在争议.
- * 一个多世纪以来,Protura,Collembola和Diplura的遗传学位置一直是有争议的,这影响了我们对昆虫身体计划进化和地球化的理解.
研究的目的:
- * 用全面的分子数据和先进的家族遗传模型来解决早期六足动物血统的进化关系.
- * 调查不同分析模型对古代分歧的遗传学推断的影响.
主要方法:
- *对所有六足动物种群的广泛采样进行了基因组学分析.
- * 实验各种跨站点组成异质模型,包括CAT-GTR模型,以解决古老的分歧.
- * 对植物遗传模型进行交叉验证,以评估它们与数据相匹配.
主要成果:
- *这项研究支持Protura作为最早分离的六足动物血统 (Protura姐妹假说).
- *Collembola被认为是Diplura的姐妹群,形成了Entognatha类.
- * Protura-姐妹假设,通过异地模型恢复,显示出明显更好的模型匹配比同质模型.
结论:
- * 拟议的六足动物系,以Protura为姐妹系,是强大的,并得到多种证据的支持,包括线粒体和比较形态学.
- * 这种已解决的系系形成为理解昆虫陆地化演变及其非凡的巨大多样性提供了至关重要的框架.
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