Raskina O, Barber J C, Nevo E, Belyayev A
Institute of Evolution, University of Haifa, Israel.
Cytogenet Genome Res. 2008;120(3-4):351-7. doi: 10.1159/000121084. Epub 2008 May 23.
Chromosomal change is one of the more hotly debated potential mechanisms of speciation. It has long been argued over whether--and to what degree--changes in chromosome structure contribute to reproductive isolation and, ultimately, speciation. In this review we do not aim to completely analyze accumulated data about chromosomal speciation but wish to draw attention to several critical points of speciation-related chromosomal change, namely: (a) interrelations between chromosomal rearrangements and repetitive DNA fraction; (b) mobility of ribosomal DNA clusters; and (c) rDNA and transposable elements as perpetual generators of genome instability.
染色体变化是物种形成中备受争议的潜在机制之一。长期以来，人们一直在争论染色体结构的变化是否以及在何种程度上导致生殖隔离，并最终导致物种形成。在本综述中，我们并非旨在全面分析有关染色体物种形成的累积数据，而是希望提请注意与物种形成相关的染色体变化的几个关键点，即：（a）染色体重排与重复DNA片段之间的相互关系；（b）核糖体DNA簇的移动性；以及（c）rDNA和转座元件作为基因组不稳定性的永久产生者。
