Rieseberg LH, Sinervo B, Linder CR, Ungerer MC, Arias DM
L. H. Rieseberg, B. Sinervo, C. R. Linder, M. C. Ungerer, Department of Biology, Indiana University, Bloomington, IN 47405, USA. D. M. Arias, Centro de Investigacion Ambiental E Investigacion Sierra de Huautla, Universidad Autonoma del Estado de Morelos, Cuernavaca, Morelos, Mexico 62210.
Science. 1996 May 3;272(5262):741-5. doi: 10.1126/science.272.5262.741.
The origin of a new diploid species by means of hybridization requires the successful merger of differentiated parental species' genomes. To study this process, the genomic composition of three experimentally synthesized hybrid lineages was compared with that of an ancient hybrid species. The genomic composition of the synthesized and ancient hybrids was concordant (rs = 0.68, P < 0.0001), indicating that selection to a large extent governs hybrid species formation. Further, nonrandom rates of introgression and significant associations among unlinked markers in each of the three synthesized hybrid lineages imply that interactions between coadapted parental species' genes constrain the genomic composition of hybrid species.
通过杂交形成新的二倍体物种需要成功融合分化的亲本物种基因组。为了研究这一过程，将三个实验合成的杂交谱系的基因组组成与一个古老杂交物种的基因组组成进行了比较。合成杂交种和古老杂交种的基因组组成是一致的（rs = 0.68，P < 0.0001），这表明选择在很大程度上控制着杂交物种的形成。此外，三个合成杂交谱系中每个谱系的基因渗入非随机率以及非连锁标记之间的显著关联意味着共同适应的亲本物种基因之间的相互作用限制了杂交物种的基因组组成。
