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种植一个大陆:植物基因组学揭示了澳大利亚青多样化的时间

Ian G Brennan^1,2, Alan R Lemmon³, Emily Moriarty Lemmon⁴

¹Division of Ecology & Evolution, The Australian National University, Canberra, ACT 2601, Australia.

Systematic biology

|August 1, 2023

概括

澳大利亚青表现出了显著的多样性,其中一些古老的血统可以追溯到冈德瓦纳,而另一些则是最近的亚洲移民. 它们的适应性辐射揭示了对生命的洞察力.

科学领域:

进化生物学进化生物学
动物学动物学
基因组学就是基因组学.

背景情况:

澳大利亚独特的生物多样性是由于其大小,孤立和与冈德瓦纳的分离而产生的.
澳大利亚青在与远距离相关的群体中表现出显著的生态和形态多样性.
了解青的进化历史对于理解澳大利亚脊椎动物辐射至关重要.

研究的目的:

为澳大利亚的myobatrachoid,pelodryadid hyloid和microhylid青建立一个家族学假设.
为了确定主要澳大利亚青血统的进化时间尺度和起源.
调查澳大利亚大陆的深远殖民化和多样化过程.

主要方法:

使用外体捕获数据构建了一个时间校准的基因组树.
遗传学分析涵盖了关键的澳大利亚青类,包括Myobatrachidae,Pelodryadidae和Microhylidae.
对血统年龄进行了比较分析,以了解多元化模式.

主要成果:

这项研究确定了澳大利亚青群体之间广泛的分歧时间,从古代冈多瓦纳遗迹到最近的亚洲抵达.
这些发现揭示了澳大利亚最古老的脊椎动物辐射在其青动物群中.
青血统的年龄分层为我们提供了通过地质时间对殖民和多样化的洞察.

结论:

澳大利亚青的多样性是由古贡多瓦的起源和最近的移民形成的.
的适应性辐射,特别是它们对热量和干旱的反应,在当代澳大利亚青动物群中很明显.
这项研究为澳大利亚的脊椎动物殖民和适应性进化提供了深入的时间视角.

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