Invasion of one insect species, Adalia bipunctata, by two different male-killing bacteria
Invasion of one insect species, Adalia bipunctata, by two different male-killing bacteria
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DOI：
10.1046/j.1365-2583.1999.810133.x
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发表时间：
1999-02-01
影响因子：
2.6
通讯作者：
Majerus, MEN
中科院分区：
文献类型：
--
作者：
Hurst, GDD;von der Schulenburg, JHG;Majerus, MEN
杀死雄性的细菌是通过雌性遗传的，只杀死雄性后代，已知存在于五个不同目的昆虫中。我们对这些元素的发生率的了解源于它们在不同物种中的表型的发现，因此，我们对昆虫被这些元素入侵的频率的估计取决于对一个物种中与单一微生物相关的雄性杀死表型的每次观察。我们在这里记录一个例子，一个单一的昆虫物种被两种不同的分类杀死雄性细菌感染。西欧的双斑瓢虫种群，Adalia bipunctata，以前被证明携带一种杀死雄性的立克次体，然而，我们在这里表明，大多数来自中欧和东欧的雄性杀死系不携带这种细菌。相反，16S rDNA序列分析表明，雄性杀戮与螺原体属的许多成员有关。我们讨论了这一结论的关系，雄性杀灭细菌的进化遗传学，并在真细菌雄性杀灭行为的进化。
Male-killing bacteria, which are inherited through the female line and kill male progeny only, are known from five different orders of insect. Our knowledge of the incidence of these elements has stemmed from discovery of their phenotype in different species, Our estimate of the frequency with which insects have been invaded by these elements therefore depends on each observation of the male-killing phenotype within a species being associated with a single microorganism. We here record an example of a single insect species being infected with two taxonomically distinct male-killing bacteria. Western European populations of the two-spot ladybird, Adalia bipunctata, have previously been shown to bear a male-killing Rickettsia, However, we here show that the majority of the male-killing lines tested from Central and Eastern Europe do not bear this bacterium. Rather, 16S rDNA sequence analysis suggests male-killing is associated with st member of the genus Spiroplasma. We discuss this conclusion in relation to the evolutionary genetics of male-killing bacteria, and the evolution of male-killing behaviour in the eubacteria.