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The genetic architecture of sexually selected traits in two natural populations of Drosophila montana

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Date
2015
Author
Veltsos, P.
Gregson, E.
Morrissey, B.
Slate, J.
Hoikkala, A.
Butlin, R.K.
Ritchie, M.G.
Funder
NERC
Grant ID
NE/E015255/1
Keywords
QH301 Biology
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Abstract
We investigated the genetic architecture of courtship song and cuticular hydrocarbon traits in two phygenetically distinct populations of Drosophila montana. To study natural variation in these two important traits, we analysed within-population crosses among individuals sampled from the wild. Hence, the genetic variation analysed should represent that available for natural and sexual selection to act upon. In contrast to previous between-population crosses in this species, no major quantitative trait loci (QTLs) were detected, perhaps because the between-population QTLs were due to fixed differences between the populations. Partitioning the trait variation to chromosomes suggested a broadly polygenic genetic architecture of within-population variation, although some chromosomes explained more variation in one population compared with the other. Studies of natural variation provide an important contrast to crosses between species or divergent lines, but our analysis highlights recent concerns that segregating variation within populations for important quantitative ecological traits may largely consist of small effect alleles, difficult to detect with studies of moderate power.
Citation
Veltsos , P , Gregson , E , Morrissey , B , Slate , J , Hoikkala , A , Butlin , R K & Ritchie , M G 2015 , ' The genetic architecture of sexually selected traits in two natural populations of Drosophila montana ' , Heredity , vol. In press . https://doi.org/10.1038/hdy.2015.63
Publication
Heredity
Status
Peer reviewed
DOI
https://doi.org/10.1038/hdy.2015.63
ISSN
0018-067X
Type
Journal article
Rights
© 2015. Macmillan Publishers Limited All rights reserved. This is an Accepted Manuscript of an article published in Heredity, July 2015, available online: http://www.nature.com/hdy/journal/vaop/ncurrent/full/hdy201563a.html
Description
The work was supported by the National Environment Research Council (grant NE/E015255/1 to MGR and RKB) and the Academy of Finland (project 132619 to AH).
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  • University of St Andrews Research
URL
http://www.nature.com/hdy/journal/vaop/ncurrent/suppinfo/hdy201563s1.html
URI
http://hdl.handle.net/10023/8057

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