Department of Biology, The University of Western Ontario, London, ON N6A 5B7, Canada.
Biology Department, Duke University, Durham, NC 27708, Canada.
Genes (Basel). 2021 Oct 26;12(11):1703. doi: 10.3390/genes12111703.
Behavioral isolation is considered to be the primary mode of species isolation, and the lack of identification of individual genes for behavioral isolation has hindered our ability to address fundamental questions about the process of speciation. One of the major questions that remains about behavioral isolation is whether the genetic basis of isolation between species also varies within a species. Indeed, the extent to which genes for isolation may vary across a population is rarely explored. Here, we bypass the problem of individual gene identification by addressing this question using a quantitative genetic comparison. Using strains from eight different populations of , we genetically mapped the genomic regions contributing to behavioral isolation from their closely related sibling species, . We found extensive variation in the size of contribution of different genomic regions to behavioral isolation among the different strains, in the location of regions contributing to isolation, and in the ability to redetect loci when retesting the same strain.
行为隔离被认为是物种隔离的主要模式，而个体基因在行为隔离方面缺乏鉴定，这阻碍了我们解决关于物种形成过程的基本问题的能力。关于行为隔离的一个主要问题是，物种之间隔离的遗传基础是否也在物种内部发生变化。事实上，很少有研究探索隔离基因在种群中可能发生变化的程度。在这里，我们通过使用定量遗传比较来解决这个问题，从而绕过个体基因鉴定的问题。使用来自 8 个不同种群的菌株，我们从其密切相关的姊妹物种 中遗传定位了导致行为隔离的基因组区域。我们发现，不同菌株之间，不同基因组区域对行为隔离的贡献大小、导致隔离的区域位置以及在同一菌株重新测试时重新检测到基因座的能力存在广泛的变化。
