鸟类迁徙行为的调节基础:通往相似结果的不同道路

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Violeta Caballero-López, Staffan Bensch
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引用次数: 0

摘要

动物迁徙是一种令人着迷的现象,自古希腊时代以来就一直困扰着人类。这一过程广泛存在于各种类群中,尤其是鸟类,由于其流动性,其迁徙路线和策略呈现出惊人的多样性。随着追踪设备的进步和测序技术的改进,最近的研究支持了不同物种的一些迁徙特征受到遗传因素的强烈影响。然而,几乎没有证据表明这种复杂行为背后存在任何基于序列的共同机制,也没有任何统一的原理可以解释这种行为。我们回顾了在了解迁徙性状的遗传基础时,应如何将重点转向研究基因表达的调控机制,而不是传统的候选基因方法。重要的是,将基因表达作为迁徙表型的基本驱动力,可以解决迁徙主要受遗传或环境影响的对立观点。我们强调,研究应该有新的方向,并进一步指出,鸟类迁徙的调控可能并不存在一个共同的遗传基础。在此,我们支持以下观点:1)只有当迁徙是一种常变性较大的数量性状时,其进化速度才会如此之快;2)迁徙进化的主要驱动因素似乎是多样化的表达调控机制,而不是基因水平的多态性;3)基因组的非编码序列、表观遗传学和结构变异在塑造复杂性状方面的作用可能比以前认为的更为重要。此外,我们还提出了几个假设,概述了这些调控机制如何在不同鸟类物种中发挥作用,从而定义某些迁徙性状。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The regulatory basis of migratory behaviour in birds: different paths to similar outcomes
Animal migration is a fascinating phenomenon that has puzzled mankind since the time of ancient Greece. It is a process widespread across a varied range of taxa and it shines especially in birds which, because of their mobility, display an amazing diversity of routes and strategies. With the advances in tracking devices and improvements of sequencing technologies, recent work provides support for a strong genetic influence of several migratory traits across different species. However, there is little to no evidence of any common sequence‐based mechanism behind this complex behaviour, nor any unifying principle explaining it. We review how the focus in understanding the genetic basis for migratory traits should be shifted towards studying regulatory mechanisms of gene expression instead of the traditional candidate gene approach. Importantly, a role for gene expression as the underlying driver of the migratory phenotype can resolve the opposing and often strong views that migration is mainly either under genetic or environmental influence. We emphasise that research should take new directions, reinforcing that there is probably not a common genetic basis for how migration is regulated in birds. Here, we support the notion that 1) migration can only evolve this fast if it is a quantitative trait with a large standing variation; 2) the main drivers for migration evolution seem to be diverse expression–regulation mechanisms rather than gene‐level polymorphisms; and 3) non‐coding sequences of the genome, epigenetics and structural variation might be more important in shaping complex traits than previously thought. Further, we present several hypotheses outlining how these regulatory mechanisms might work across different bird species defining certain migratory traits.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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