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关于神秘物种的基因组视角揭示了在物种连续性的灰色区域中复杂的进化动态

Kin Onn Chan^1,2, Dario N Neokleous³, Shahrul Anuar⁴

¹Department of Integrative Biology; Ecology, Evolution, and Behavior Program; MSU Museum; Michigan State University, East Lansing, MI 48824, USA.

Systematic biology

|January 14, 2026

概括

基因流动显著影响了神秘物种的进化,挑战了传统的检测方法. 这项研究揭示了许多所谓的神秘物种实际上是持续多样化的一部分,而不是不同的进化血统.

科学领域:

进化生物学进化生物学
基因组学就是基因组学.
规格规格规格规格

背景情况:

神秘的物种,在遗传上是不同的,但在形态上是相似的,在进化研究中提出了挑战.
目前用于检测神秘物种的方法通常假定缺少基因流,可能误解进化动态.
婆罗洲牙青是神秘多样性的典范,其中一种物种以前被分为18个遗传上不同的群体.

研究的目的:

研究基因流动对婆罗洲的进化轨迹和物种界限的影响.
评估谱系的独立性,并识别与独立进化的物种相比,凝聚在一起的超级种群谱系.
在正在进行的多样化和基因流动的背景下,重新评估神秘物种的概念.

主要方法:

利用了来自马来西亚婆罗洲14种名义物种的13,000多个位置的目标捕获数据.
采用网络多种凝聚 (NMSC) 和多种凝聚与迁移 (MSC +迁移) 模型.
评估了遗传分歧和凝聚力指标,以根据统一物种概念定义物种界限.

主要成果:

在14种名义物种中,只有6种明显形成了独立进化的血统;其他的则是嵌套的元人口血统.
全基因组的差异 (0.5-2%) 将所有"神秘物种"置于物种化的"灰色区域",表明正在进行的多样化.
基因流产生了诸如"人工分支效应"和"物种定义异常区"之类的工件,混了物种界限.

结论:

隐秘的物种不是缺乏形态演变的独特单元,而是在物种化灰色区域的多样化的动态表现.
基因流在塑造进化轨迹和物种界限方面发挥着至关重要的作用,需要生物多样性解释的动态框架.
不同的基因组标记物产生不同的遗传学不一致性和基因流信号,影响它们对遗传学重建和迁移推断的有用性.

关键词:

两动物两动物人工分支效应的人工分支效应多样化的多样化.基因流动基因流动网状细胞的进化过程种类定义异常区区域种类划分种类划分

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