Research Topics
Genomes and Genes | D J ObbardSummaryAffiliation: University of Edinburgh Country: UK Publications
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Publications
Estimating divergence dates and substitution rates in the Drosophila phylogenyDarren J Obbard
Institute of Evolutionary Biology, and Centre for Infection Immunity and Evolution, University of Edinburgh, Edinburgh, United Kingdom
Mol Biol Evol 29:3459-73. 2012..As either source of error will bias estimates of divergence time, we suggest mutation rate estimates be used until better models are available...
Alternative splicing of the Anopheles gambiae Dscam gene in diverse Plasmodium falciparum infectionsPaul H Smith
Institute of Evolutionary Biology and Centre for Immunity, Infection and Evolution, School of Biological Sciences, University of Edinburgh, EH93JT Edinburgh, UK
Malar J 10:156. 2011..g. between bacteria and Plasmodium or between Plasmodium berghei and Plasmodium falciparum). Here, data are presented from the first study of Dscam expression in response to genetic diversity within a parasite species...
Recent and recurrent selective sweeps of the antiviral RNAi gene Argonaute-2 in three species of DrosophilaDarren J Obbard
Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, UK
Mol Biol Evol 28:1043-56. 2011..In summary, our results show that selection by parasites can consistently target the same genes in multiple species, resulting in areas of the genome that have markedly reduced genetic diversity...
Quantifying adaptive evolution in the Drosophila immune systemDarren J Obbard
Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, UK
PLoS Genet 5:e1000698. 2009....
Inferring selection in the Anopheles gambiae species complex: an example from immune-related serine protease inhibitorsDarren J Obbard
Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, UK
Malar J 8:117. 2009..However, there is little conclusive evidence that any of these mosquito genes evolve rapidly, or show other signatures of adaptive evolution...
The evolution of RNAi as a defence against viruses and transposable elementsDarren J Obbard
Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, Ashworth Laboratories, King s Buildings, Edinburgh EH9 3JT, UK
Philos Trans R Soc Lond B Biol Sci 364:99-115. 2009..Over longer time scales, key RNAi genes are repeatedly duplicated or lost across the metazoan phylogeny, with important implications for RNAi as an immune defence...
The evolution of TEP1, an exceptionally polymorphic immunity gene in Anopheles gambiaeDarren J Obbard
Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, West Mains Rd, Edinburgh EH9 3JT, UK
BMC Evol Biol 8:274. 2008..We studied whether TEP1 is a case of an ancient balanced polymorphism in an animal immune system...
Population genetics of Plasmodium resistance genes in Anopheles gambiae: no evidence for strong selectionD J Obbard
Institute of Evolutionary Biology, University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh, UK
Mol Ecol 16:3497-510. 2007....
Hybridization, polyploidy, and the evolution of sexual systems in Mercurialis (Euphorbiaceae)Darren J Obbard
Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, United Kingdom
Evolution 60:1801-15. 2006..huetii and monoecious tetraploid M. annua, an event that brought together the genes for specialist males with those for hermaphrodites...
Simple allelic-phenotype diversity and differentiation statistics for allopolyploidsD J Obbard
Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK
Heredity (Edinb) 97:296-303. 2006....
Sexual systems and population genetic structure in an annual plant: testing the metapopulation modelDarren J Obbard
Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, United Kingdom
Am Nat 167:354-66. 2006..In contrast, regional diversity in M. annua appears to be primarily a product of postglacial range expansion from two refugia in the eastern and western Mediterranean Basin...
Natural selection drives extremely rapid evolution in antiviral RNAi genesDarren J Obbard
Institute of Evolutionary Biology, University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh EH9 3JT, United Kingdom
Curr Biol 16:580-5. 2006..This is a signature of host-pathogen arms races and implies that the ancient battle between RNA viruses and host antiviral RNAi genes is active and significant in shaping RNAi function...
RNA interference: endogenous siRNAs derived from transposable elementsDarren J Obbard
Institute of Evolutionary Biology, University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh EH9 3JT, UK
Curr Biol 18:R561-3. 2008..Now, deep sequencing of short RNAs from somatic tissue and cell culture has identified a novel class of endogenous siRNAs that may have a similar role in the soma...
The recent spread of a vertically transmitted virus through populations of Drosophila melanogasterJennifer A Carpenter
Institute of Evolutionary Biology, University of Edinburgh, Edinburgh EH9 3JT, Scotland, UK
Mol Ecol 16:3947-54. 2007..This is surprising for a vertically transmitted pathogen that has a similar migration rate to its host. We suggest that the low structure in the viral populations can be explained by the smaller effective population size of the virus...
The age and evolution of an antiviral resistance mutation in Drosophila melanogasterJenny Bangham
School of Biological Sciences, Institute of Evolutionary Biology, The University of Edinburgh, Ashworth Laboratories, The King s Buildings, West Mains Road, Edinburgh EH9 3JT, UK
Proc Biol Sci 274:2027-34. 2007..We find that the ref(2)P resistance mutation is considerably older than the recent spread of this viral strain and suggest that--possibly because it is recessive--the initial spread of the resistance mutation was very slow...
Sigma viruses from three species of Drosophila form a major new clade in the rhabdovirus phylogenyBen Longdon
Institute of Evolutionary Biology, University of Edinburgh, Ashworth Laboratories, Kings Buildings, West Mains Road, Edinburgh EH9 3JT, UK
Proc Biol Sci 277:35-44. 2010..Our data suggest that the bias towards research into plants and vertebrates means that much of the diversity of rhabdoviruses has been missed, and rhabdoviruses may be common pathogens of insects...
