Investigating the role of hybridization in the evolution of the genus Corydoras
Lead Research Organisation:
Bangor University
Department Name: Sch of Biological Sciences
Abstract
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.
Publications
Alexandrou MA
(2011)
Competition and phylogeny determine community structure in Müllerian co-mimics.
in Nature
Fuller, Ian; Evers, Hans-Georg
(2011)
Identifying Corydoradinae Catfish Supplement 1: supplement 1
Marburger S
(2018)
Whole genome duplication and transposable element proliferation drive genome expansion in Corydoradinae catfishes.
in Proceedings. Biological sciences
Description | Corydoras catfish that shared colour patterns were not closely related genetically. They were in fact Mullerian mimics. We identified no evidence of hybridisation using a single nuclear gene (RAG1). |
Exploitation Route | Evolution of mimicry. |
Sectors | Environment |
URL | https://www.uea.ac.uk/~b141/Research2.html |
Description | The findings have been discussed in the aquarium literature. This demonstrates societal impact. |
First Year Of Impact | 2011 |
Impact Types | Societal |
Description | Brazil Science without borders |
Amount | R$ 100,000 (BRL) |
Organisation | National Council for Scientific and Technological Development (CNPq) |
Sector | Public |
Country | Brazil |
Start | 10/2012 |
End | 10/2015 |
Description | NERC phd studentship |
Amount | £90,000 (GBP) |
Funding ID | NE/F007205/1 |
Organisation | Natural Environment Research Council |
Sector | Public |
Country | United Kingdom |
Start | 10/2008 |
End | 10/2011 |
Description | SUERC stable isotope access grant |
Amount | £10,000 (GBP) |
Funding ID | NE/F007205/1 |
Organisation | Natural Environment Research Council |
Sector | Public |
Country | United Kingdom |
Start | 10/2009 |
End | 10/2011 |
Description | Claudio Oliveira |
Organisation | Sao Paulo State University |
Country | Brazil |
Sector | Academic/University |
PI Contribution | Contribution to field work, teaching workshops in Brazil, Research seminars, |
Collaborator Contribution | Assistance with fieldwork, sample provision, sampling permits |
Impact | Alexandrou, M. A., C. Oliveira, M. Maillard, R. A. R. McGill, J. Newton, S. Creer and M. I. Taylor. Competition and phylogeny determine community structure in Müllerian co-mimics. Nature, 469, 84-88, 2011. DOI:10.1038/nature09660 |
Description | Catfish study group |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Public/other audiences |
Results and Impact | Talk sparked questions and discussion Publication in aquarist book with Chairman of Catfish study Group |
Year(s) Of Engagement Activity | 2009 |