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首页> 外文期刊>Zoological Science >Appearance of Males in a Thelytokous Strain of Milnesium cf. tardigradum (Tardigrada)
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Appearance of Males in a Thelytokous Strain of Milnesium cf. tardigradum (Tardigrada)

机译：雄性拟青霉菌株中雄性的外观cf. tardigradum（Tardigrada）

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摘要

Tardigrades are generally gonochoristic. Many moss-dwelling species propagate by parthenogenesis, but heterogony has not yet been found. Milnesium tardigradum, a carnivorous tardigrade, also has both sexes, but males are usually rare and many populations appear to have only parthenogenetic reproduction. Since 2000, I have maintained a thelytokous strain of Milnesium cf. tardigradum that originated from one female. Individuals of this strain were thought to be all females, but here I report that males have emerged in this strain at a very low frequency. This is the first report of the appearance of males in parthenogenetic tardigrades. On the first pair of legs of some individuals, I observed the modified claws characteristic of males of this species. It is unknown whether these males can actually function in sexual reproduction; however, they might allow some possibility of genetic exchange among clonal populations. No environmental factors that generate males were determined.
机译：缓坡一般是变态的。许多居住在苔藓中的物种通过孤雌生殖繁殖，但尚未发现异源性。食肉性的缓步草（Milnesium tardigradum）也有性别，但雄性通常很少见，许多种群似乎只有孤雌生殖繁殖。自2000年以来，我一直在维持Milnesium cf的thelytokous菌株。源自一名女性的tardigradum。该菌株的个体被认为全部是雌性，但在这里我报告说，该菌株中的男性出现频率很低。这是雄性单性生殖缓坡中雄性出现的第一个报道。在某些人的第一对腿上，我观察到了该物种雄性的改良爪特征。这些男性是否真的可以在性生殖中发挥作用还不得而知。但是，它们可能允许克隆种群之间进行某种遗传交换。尚未确定产生雄性的环境因素。

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