Investigating the role of hybridization in the evolution of the genus Corydoras

研究杂交在 Corydoras 属进化中的作用

• 批准号: NE/C001168/2
• 负责人: Martin Taylor
• 金额: $ 1.52万
• 依托单位: Bangor University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FC001168%2F2
• 关键词: Investigating; role; hybridization; evolution; genus

Hybridization, where two species mate and produce offspring is being increasingly recognised as having an important role in the evolution of new species and even groups of species. It has been implicated in the evolution of the Hawaiian crickets, the Lake Baikal sculpins and the African lacustrine cichlids (three radiations of several hundred species each) to name but three. In this study I will investigate the role hybridization has played in the evolution of a group of South American catfish, many of which have undergone a doubling of their DNA at some point in their evolutionary history. I will determine the sequences of mitochondrial DNA genes (which are inherited solely from the mother), and nuclear genes, for which a copy is inherited from the father and the mother. The relationships between species will then be determined using differences in these DNA sequences. In species in which hybridization has occurred, DNA sequences from both the parental species should be present at nuclear genes, and this may allow the evolutionary history of which species have hybridised to produce new species to be determined. Microsatellite markers will also be used to investigate the minimum ploidy level of each taxa in order to determine whether the genome of each species has been doubled in its evolutionary history.

杂交，两个物种交配并产生后代，越来越被认为在新物种甚至物种群的进化中起着重要作用。夏威夷蟋蟀、贝加尔湖杜父鱼和非洲湖泊慈鲷（三种辐射，每种几百个物种）的进化都与此有关。在这项研究中，我将研究杂交在一组南美鲶鱼的进化中所起的作用，其中许多鲶鱼在其进化历史的某个时刻经历了DNA的加倍。我将确定线粒体DNA基因（仅从母亲遗传）和核基因的序列，其中一个拷贝是从父亲和母亲遗传的。然后，将利用这些DNA序列的差异来确定物种之间的关系。在发生杂交的物种中，来自两个亲本物种的DNA序列应该存在于核基因中，这可能允许确定哪些物种杂交产生新物种的进化历史。微卫星标记也将用于调查每个分类群的最低倍性水平，以确定每个物种的基因组是否在其进化历史中被加倍。

项目成果

Whole genome duplication and transposable element proliferation drive genome expansion in Corydoradinae catfishes.

• DOI: 10.1098/rspb.2017.2732
• 发表时间: 2018-02-14
• 期刊: Proceedings. Biological sciences
• 作者: Marburger S;Alexandrou MA;Taggart JB;Creer S;Carvalho G;Oliveira C;Taylor MI
• 通讯作者: Taylor MI

Identifying Corydoradinae Catfish Supplement 1: supplement 1

识别 Corydoradinae 鲶鱼补充剂 1：补充剂 1

• 发表时间: 2011
• 作者: Fuller, Ian;Evers, Hans-Georg
• 通讯作者: Evers, Hans-Georg