Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
Evolution. 2012 Jun;66(6):1907-16. doi: 10.1111/j.1558-5646.2011.01561.x. Epub 2012 Feb 2.
Mitochondria and Wolbachia are maternally inherited genomes that exhibit strong linkage disequilibrium in many organisms. We surveyed Wolbachia infections in 187 specimens of the fig wasp species, Ceratosolen solmsi, and found an infection prevalence of 89.3%. DNA sequencing of 20 individuals each from Wolbachia-infected and -uninfected subpopulations revealed extreme mtDNA divergence (up to 9.2% and 15.3% in CO1 and cytochrome b, respectively) between infected and uninfected wasps. Further, mtDNA diversity was significantly reduced within the infected group. Our sequencing of a large part of the mitochondrial genome from both Wolbachia-infected and -uninfected individuals revealed that high sequence divergence is common throughout the mitochondrial genome. These patterns suggest a partial selective sweep of mitochondria subsequent to the introduction of Wolbachia into C. solsmi, by hybrid introgression from a related species.
线粒体和沃尔巴克氏体是母系遗传的基因组，在许多生物中表现出强烈的连锁不平衡。我们调查了 187 个榕小蜂属 Ceratosolen solmsi 种的沃尔巴克氏体感染情况，发现感染率为 89.3%。对来自感染和未感染亚群的 20 个人的 DNA 测序表明，感染和未感染榕小蜂之间的 mtDNA 差异极大（CO1 和细胞色素 b 分别高达 9.2%和 15.3%）。此外，感染组的 mtDNA 多样性显著降低。我们对来自感染和未感染个体的线粒体基因组的大部分进行测序，结果表明，线粒体基因组的高序列差异很常见。这些模式表明，沃尔巴克氏体引入 C. solsmi 后，通过与相关物种的杂交渗透，线粒体发生了部分选择清除。
