School of Biological Sciences, The University of Queensland, Brisbane, Qld, Australia.
J Evol Biol. 2010 Jan;23(1):231-5. doi: 10.1111/j.1420-9101.2009.01891.x. Epub 2009 Nov 13.
Reproductive parasites such as Wolbachia can spread through uninfected host populations by increasing the relative fitness of the infected maternal lineage. However, empirical estimates of how fast this process occurs are limited. Here we use nucleotide sequences of male-killing Wolbachia bacteria and co-inherited mitochondria to address this issue in the island butterfly Hypolimnas bolina. We show that infected specimens scattered throughout the species range harbour the same Wolbachia and mitochondrial DNA as inferred from 6337 bp of the bacterial genome and 2985 bp of the mitochondrial genome, suggesting this strain of Wolbachia has spread across the South Pacific Islands at most 3000 years ago, and probably much more recently.
生殖寄生虫，如沃尔巴克氏体，可以通过增加感染母系的相对适应性在未感染的宿主群体中传播。然而，关于这个过程发生的速度的经验估计是有限的。在这里，我们使用杀雄沃尔巴克氏体细菌的核苷酸序列和共同遗传的线粒体来解决这个问题在岛屿蝴蝶 Hypolimnas bolina 中。我们表明，感染的标本分散在该物种的整个范围内，携带与从细菌基因组的 6337bp 和线粒体基因组的 2985bp 推断出的相同的沃尔巴克氏体和线粒体 DNA，这表明这种沃尔巴克氏体菌株在南太平洋岛屿上的传播时间不超过 3000 年前，而且很可能是更近的时候。
