Coexistence of sexual individuals and genetically isolated asexual counterparts in a thrips.

Coexistence of sexual individuals and genetically isolated asexual counterparts in a thrips.
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DOI:
10.1038/srep03286
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发表时间:
2013-11-21
期刊:
影响因子:
4.6
通讯作者:
Hasegawa, Eisuke
Hasegawa, Eisuke
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kobayashi, Kazuya;Yoshimura, Jin;Hasegawa, Eisuke

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性是一种矛盾的现象,因为它比无性繁殖效率低。为了解决这个矛盾,我们需要在有性和无性形式之间进行直接比较。然而,在许多生物体中,有性和无性形式并不发生在同一栖息地或同一时间。在少数情况下,有性和无性形式在一个单一的人口中发现,一些(虽然罕见)遗传交换通常是检测到两种形式之间。当基因交换发生时,直接比较是不可能的。在这里,我们调查的蓟马表现出有性和无性的形式(血统)是形态上难以区分的。我们检查这两种形式是否在遗传上是孤立的。基于核基因的系统发育证实了有性和无性谱系在遗传上是有区别的。因此,我们表明,目前的系统具有一定的优势,现有的和以前使用的模型系统在有性生殖的进化。
Sex is a paradoxical phenomenon because it is less efficient compared with asexual reproduction. To resolve this paradox we need a direct comparison between sexual and asexual forms. In many organisms, however, sexual and asexual forms do not occur in the same habitat, or at the same time. In a few cases where sexual and asexual forms are found in a single population, some (though rare) genetic exchange is usually detected between the two forms. When genetic exchange occurs a direct comparison is impossible. Here we investigate a thrips exhibiting both sexual and asexual forms (lineages) that are morphologically indistinguishable. We examine if the two forms are genetically isolated. Phylogeny based on nuclear genes confirms that the sexual and asexual lineages are genetically differentiated. Thus we demonstrate that the current system has certain advantages over existing and previously used model systems in the evolution of sexual reproduction.
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发表时间: 1990-04-01
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