On the nature of species: insights from Paramecium and other ciliates.
On the nature of species: insights from Paramecium and other ciliates.
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DOI：
10.1007/s10709-011-9571-3
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发表时间：
2011-05
期刊：
影响因子：
1.5
通讯作者：
Katz, Laura A.
中科院分区：
文献类型：
--
作者：
Hall, Meaghan S.;Katz, Laura A.
目前科学界使用的多物种概念（如形态学、生物学、系统发育学）是统一的，因为它们都旨在捕捉种群之间分化的过程。例如，生物物种概念（Biological Species Concept， BSC）将物种定义为在繁殖方面与其他生物群体隔离的自然生物群体。在这里，我们综合了近一个世纪对纤毛虫属草履虫的研究，突出了我们对物种本质的普遍观念的缺点。在这个谱系中，形态、交配行为和遗传学之间存在不一致，这些特征被认为是相关的，至少在足够的时间过去之后，在所有物种概念下。有趣的是，表观遗传现象在纤毛虫中有很好的记录，它们影响生殖系/体细胞分化和交配类型决定等特征。因此，我们假设纤毛虫种群内的差异是由于遗传因素和表观遗传因素之间的动态相互作用。越来越多的可能影响物种形成的表观遗传现象的例子（即通过影响性染色体的动力学、杂交的命运、合子驱动和基因组冲突）表明，遗传学和表观遗传之间的相互作用也可能推动其他真核生物谱系的分化。
The multiple species concepts currently in use by the scientific community (e.g. Morphological, Biological, Phylogenetic) are united in that they all aim to capture the process of divergence between populations. For example, the Biological Species Concept (BSC) defines a species as a natural group of organisms that is reproductively isolated from other such groups. Here we synthesize nearly a century of research on the ciliate genus Paramecium that highlights the shortcomings of our prevailing notions on the nature of species. In this lineage, there is discordance between morphology, mating behavior, and genetics, features assumed to be correlated, at least after sufficient time has passed, under all species concepts. Intriguingly, epigenetic phenomena are well documented in ciliates where they influence features such as germline/soma differentiation and mating type determination. Consequently, we hypothesize that divergence within ciliate populations is due to a dynamic interaction between genetic and epigenetic factors. The growing list of examples of epigenetic phenomena that potentially impact speciation (i.e. by influencing the dynamics of sex chromosomes, fate of hybrids, zygotic drive and genomic conflicts) suggests that interactions between genetics and epigenetics may also drive divergence in other eukaryotic lineages.
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影响因子：
6.5
作者：
De Queiroz, Kevin
通讯作者：
De Queiroz, Kevin
影响因子：
2.9
作者：
Dobzhansky, T
通讯作者：
Dobzhansky, T
DOI：
10.1111/j.1550-7408.1983.tb01048.x
发表时间：
1983-01-01
期刊：
JOURNAL OF PROTOZOOLOGY
影响因子：
--
作者：
ALLEN, SL;ADAMS, J;RUSHFORD, CL
通讯作者：
RUSHFORD, CL
影响因子：
5.6
作者：
BARNETT, A
通讯作者：
BARNETT, A
影响因子：
1.7
作者：
Mayr, E
通讯作者：
Mayr, E