Do Species Exist in Asexuals? Theory and Evidence from Bdelloid Rotifers.

Do Species Exist in Asexuals? Theory and Evidence from Bdelloid Rotifers.
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无性动物中是否存在物种?

DOI:
10.1093/icb/icv024
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发表时间:
2015
影响因子:
2.6
通讯作者:
Fontaneto D
Fontaneto D
中科院分区:
生物学2区
文献类型:
--
作者:
Fontaneto D

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在真核生物中,在没有有性重组的情况下,独立进化的实体形成并持续存在的可能性受到了质疑;然而,有些生物被认为是无性的,并且显然已经分化成多个物种,正如分类学家所承认的那样。因此,这些有机体被确认为进化悖论。我们探索了三种不同的假说,试图解决这一明显的悖论,重点是蛭形轮虫,这是一组研究最多的有机体,其中所有物种都被认为是无性的:(1)它们可能有某种隐藏的性别形式;(2)物种不代表生物实体,而只是方便的名字;以及(3)性别可能不是物种形成的必要要求。我们为前两种假说提供了充分的证据,报道了几项研究,支持(1)从不同的途径进行的蜈蚣无性繁殖,以及(2)从遗传学、颌骨形态、生态学和生理学角度支持物种的存在。因此,我们(3)通过比较蜈蚣类和单角类轮虫来探讨性别在物种形成中的作用,并总结了一些仍然可能改变我们对蜈蚣类物种理解的警告。
The possibility for independently evolving entities to form and persist in the absence of sexual recombination in eukaryotes has been questioned; nevertheless, there are organisms that are known to be asexual and that have apparently diversified into multiple species as recognized by taxonomists. These organisms have therefore been identified as an evolutionary paradox. We explore three alternative hypotheses attempting to solve the apparent paradox, focusing on bdelloid rotifers, the most studied group of organisms in which all species are considered asexual: (1) they may have some hidden form of sex; (2) species do not represent biological entities but simply convenient names; and (3) sex may not be a necessary requirement for speciation. We provide ample evidence against the first two hypotheses, reporting several studies supporting (1) bdelloids asexuality from different approaches, and (2) the existence of species from genetics, jaw morphology, ecology, and physiology. Thus, we (3) explore the role of sex in speciation comparing bdelloid and monogonont rotifers, and conclude with some caveats that could still change our understanding of bdelloid species.
澳大利亚记录的蛭形轮虫及 Philodinavus aussiensis n.sp. 的描述。
DOI: --
发表时间: 2003
期刊:
影响因子: --
作者:
C. Ricci;R. Shiel;D. Fontaneto;G. Melone
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DOI: --
发表时间: 1987
期刊: Hydrobiologia
影响因子: 2.6
作者:
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DOI: 10.1007/s10750-010-0481-7
发表时间: 2011-03-01
期刊: HYDROBIOLOGIA
影响因子: 2.6
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Fontaneto, Diego;Iakovenko, Nataliia;Barraclough, Timothy G.
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进化论:思考没有性的生活
DOI: --
发表时间: 1986
期刊: Nature
影响因子: 64.8
作者:
John Maynard Smith
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DOI: --
发表时间: 1995
期刊: Hydrobiologia
影响因子: 2.6
作者:
C. Ricci;U. Fascio
通讯作者: U. Fascio