Linkage mapping reveals sex-dimorphic map distances in a passerine bird

Hansson, B., Åkesson, M., Slate, J. and Pemberton, J.M. (2005) Linkage mapping reveals sex-dimorphic map distances in a passerine bird. Proceedings of the Royal Society B: Biological Sciences, 272 (1578). pp. 2289-2298. ISSN 1471-2954

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Abstract

Linkage maps are lacking for many highly influential model organisms in evolutionary research, including all passerine birds. Consequently, their full potential as research models is severely hampered. Here, we provide a partial linkage map and give novel estimates of sex-specific recombination rates in a passerine bird, the great reed warbler (Acrocephalus arundinaceus). Linkage analysis of genotypic data at 51 autosomal microsatellites and seven markers on the Z-chromosome (one of the sex chromosomes) from an extended pedigree resulted in 12 linkage groups with 2–8 loci. A striking feature of the map was the pronounced sex-dimorphism: males had a substantially lower recombination rate than females, which resulted in a suppressed autosomal map in males (sum of linkage groups: 110.2cM) compared to females (237.2cM; female/male map ratio: 2.15). The sex-specific recombination rates will facilitate the building of a denser linkage map and cast light on hypotheses about sex-specific recombination rates.

Item Type:	Article
Copyright, Publisher and Additional Information:	© 2005 The Royal Society
Keywords:	genetic map, linkage, recombination, heterochiasmy, bird, microsatellite
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > School of Biological Sciences (Sheffield) > Department of Animal and Plant Sciences (Sheffield)
Depositing User:	Repository Officer
Date Deposited:	19 Jun 2006
Last Modified:	08 Feb 2013 16:49
Published Version:	http://www.journals.royalsoc.ac.uk/openurl.asp?gen...
Status:	Published
Publisher:	The Royal Society
Refereed:	Yes
Identification Number:	10.1098/rspb.2005.3228
URI:	http://eprints.whiterose.ac.uk/id/eprint/1316

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