Feminizing Wolbachia in an insect, Ostrinia furnacalis (Lepidoptera: Crambidae)
Feminizing Wolbachia in an insect, Ostrinia furnacalis (Lepidoptera: Crambidae)
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DOI：
10.1038/sj.hdy.6800077
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发表时间：
2002-06-01
期刊：
影响因子：
3.8
通讯作者：
Ishikawa, Y
中科院分区：
文献类型：
--
作者：
Kageyama, D;Nishimura, G;Ishikawa, Y
沃尔巴克氏菌在节肢动物中形成一组母系遗传细菌，经常引起寄主的生殖改变，如细胞质不亲和、孤雌生殖、雄性杀戮、杂交破裂和雌性化。到目前为止，沃尔巴克氏菌诱导的雌性化只在等足类动物中有报道。在这里，我们报告了一种沃尔巴克氏菌菌株使昆虫寄主Ostrinia finacalis雌性化。在79只野生雌性玉米象中检出沃尔巴克氏菌感染13只。在13名感染的雌性中，有12名产生了全雌性后代，这一特征是母系遗传的。用四环素处理母系可产生全雄性后代。本研究结果表明，沃尔巴克氏菌感染诱导了亚洲玉米象遗传雄性的雌性化。文中还讨论了沃尔巴克氏菌诱导的亚洲玉米象和等足目昆虫雌性化的差异，以及昆虫和等足目昆虫性别决定机制的差异。对沃尔巴克氏菌WSP基因序列的系统发育分析表明，沃尔巴克氏菌诱导的玉米象和等足目动物雌性化是独立的进化起源。我们五年多的研究结果表明，在亚洲玉米象种群中，这种感染一直保持在较低的流行率。
Wolbachia, which forms a group of maternally inherited bacteria in arthropods, often cause reproduction alterations in their hosts, such as cytoplasmic incompatibility, parthenogenesis, male-killing, hybrid breakdown and feminization. To date, Wolbachia-induced feminization has been reported only in isopods. Here we report that a Wolbachia strain feminizes an insect host, Ostrinia furnacalis. Among 79 wild females of O. furnacalis examined, Wolbachia infection was detected in 13 females. Twelve of the 13 infected females produced all-female progenies, and this trait was maternally inherited. Tetracycline treatment of thelygenic matrilines resulted in the production of all-male progenies. The present findings indicate that the Wolbachia infection induces feminization of genetic males in O. furnacalis. Differences in the Wolbachia-induced feminization in O. furnacalis and that in isopods are discussed along with the differences in sex determination mechanisms between insects and isopods. Phylogenetic analysis of the wsp gene sequence of Wolbachia suggests independent evolutionary origins for the Wolbachia-induced feminizations in O. furnacalis and in isopods. Our findings over 5 years suggest that the infection has been maintained at a low prevalence in the O. furnacalis population.