Fifteen species in one: deciphering the Brachionus plicatilis species complex (Rotifera, Monogononta) through DNA taxonomy
Fifteen species in one: deciphering the Brachionus plicatilis species complex (Rotifera, Monogononta) through DNA taxonomy
复制标题
DOI：
10.1007/s10750-016-2725-7
复制
发表时间：
2017-07-01
期刊：
影响因子：
2.6
通讯作者：
Walsh, Elizabeth J.
中科院分区：
文献类型：
--
作者：
Mills, Scott;Arturo Alcantara-Rodriguez, J.;Walsh, Elizabeth J.
鉴于当前环境的迅速变化，了解生物多样性的模式和进程是一项关键任务。当所考虑的分类群是重要的生态和进化模型时，这种知识就更加重要。其中一个案例是单殖体轮虫隐种复合体褶皱臂尾轮虫（Brachionus plicatilis），这是迄今为止研究最广泛的一组轮虫，被广泛用于水产养殖，并被称为宿主大量未解决的多样性。在这里，我们整理了一个数据集，以前可用的和新生成的序列的COI和ITS1的1273分离的B。plicatilis复合体的DNA序列，并应用ABGD、PTP和GMYC三种DNA分类学方法对该复合体中15个种的存在进行了鉴定和支持。我们利用这些结果来探索形态和生态性状的系统发育信号，并利用系统发育比较模型来了解性状之间的相关性。我们的结果支持某些性状（例如体长）的生态位保守性和其他性状（例如基因组大小）的系统发育可塑性。
Understanding patterns and processes in biological diversity is a critical task given current and rapid environmental change. Such knowledge is even more essential when the taxa under consideration are important ecological and evolutionary models. One of these cases is the monogonont rotifer cryptic species complex Brachionus plicatilis, which is by far the most extensively studied group of rotifers, is widely used in aquaculture, and is known to host a large amount of unresolved diversity. Here we collate a dataset of previously available and newly generated sequences of COI and ITS1 for 1273 isolates of the B. plicatilis complex and apply three approaches in DNA taxonomy (i.e. ABGD, PTP, and GMYC) to identify and provide support for the existence of 15 species within the complex. We used these results to explore phylogenetic signal in morphometric and ecological traits, and to understand correlation among the traits using phylogenetic comparative models. Our results support niche conservatism for some traits (e.g. body length) and phylogenetic plasticity for others (e.g. genome size).