Department of Forest Sciences and Conservation, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada; Biodiversity Research Center, University of British Columbia, 2212 Main Mall, Vancouver, BC, V6T 1Z4, Canada.
Mol Ecol. 2013 Jun;22(12):3195-7. doi: 10.1111/mec.12314.
How does one species become two? What is the relative importance of selection vs. drift? How many genes are involved, what are their effect sizes and where are they located in the genome? The answers to these questions will inevitably vary from one species to another, but by addressing these questions in a diverse array of taxa, we will gradually piece together a more complete picture of how evolution works. In this issue of Molecular Ecology, Parchman et al. () have approached these questions by studying the genomic basis of differentiation along a hybrid zone between two Central American bird species, the golden-collared (Manacus vitellinus) and white-collared (Manacus candei) manakins (see Fig. ). Their work presents an interesting window into the evolution of this hybrid zone using novel analysis tools and a nice example of how to approach the study of population genomics in nonmodel organisms. [Figure: see text].
一个物种如何变成两个？选择和漂变的相对重要性是什么？涉及多少个基因，它们的效应大小是多少，以及它们在基因组中的位置在哪里？这些问题的答案必然因物种而异，但通过在不同的分类群中解决这些问题，我们将逐渐拼凑出一幅更完整的进化是如何运作的图景。在本期《分子生态学》中，Parchman 等人通过研究中美洲两种鸟类——金颈（Manacus vitellinus）和白颈（Manacus candei）之间杂交带的基因组分化基础，回答了这些问题（）（见图）。他们的工作利用新颖的分析工具，为研究非模式生物的群体基因组学提供了一个很好的范例，为这一杂交带的进化提供了一个有趣的视角。[图：见正文]。
