Imperial College London

DrChrisWilson

Faculty of Natural SciencesDepartment of Life Sciences (Silwood Park)

Honorary Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 2370chris.wilson Website

 
 
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Location

 

N3.11MunroSilwood Park

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Summary

 

Publications

Citation

BibTex format

@article{Barraclough:2018:10.1371/journal.pbio.2004830,
author = {Barraclough, TG and Nowell, R and Wilson, C and Smith, T},
doi = {10.1371/journal.pbio.2004830},
journal = {PLoS Biology},
title = {Comparative genomics of bdelloid rotifers: insights from desiccating and nondesiccating species},
url = {http://dx.doi.org/10.1371/journal.pbio.2004830},
volume = {16},
year = {2018}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Bdelloid rotifers are a Class of microscopic invertebrates that have existed for millions of years apparently without sex or meiosis. They inhabit a variety of temporary and permanent freshwater habitats globally, and many species are remarkably tolerant of desiccation. Bdelloids offer an opportunity to better understand the evolution of sex and recombination, but previous work has emphasized desiccation as the cause of several unusual genomic features in this group. Here, we present high-quality whole genome sequences of three bdelloid species: Rotaria macrura and Rotaria magnacalcarata, which are both desiccation intolerant, and Adineta ricciae, which is desiccationtolerant. In combination with the published assembly of Adineta vaga, which is also desiccation tolerant, we apply a comparative genomics approach to evaluate the potential effects of desiccation tolerance and asexuality on genome evolution in bdelloids. We find that ancestral tetraploidy is conserved among all four bdelloid species, but homologous divergence in obligately aquatic Rotaria genomes is unexpectedly low. This finding is contrary to current models regarding the role of desiccation in shaping bdelloid genomes. In addition, we find that homologous regions in A. ricciaeare largely collinear and do not form palindromic repeats as observed in the published A. vaga assembly. Consequently, several features interpreted as genomic evidence for long-term ameiotic evolution are not general to all bdelloid species, even within the same genus. Finally, we substantiate previous 50 findings of high levels of horizontally transferred non-metazoan genes in both desiccating and non-desiccating bdelloid species, and show that this unusual feature is not shared by other animal phyla, even those with desiccation-tolerant representatives. These comparisons call
AU - Barraclough,TG
AU - Nowell,R
AU - Wilson,C
AU - Smith,T
DO - 10.1371/journal.pbio.2004830
PY - 2018///
SN - 1544-9173
TI - Comparative genomics of bdelloid rotifers: insights from desiccating and nondesiccating species
T2 - PLoS Biology
UR - http://dx.doi.org/10.1371/journal.pbio.2004830
UR - http://hdl.handle.net/10044/1/58323
VL - 16
ER -