Linkage mapping reveals sex-dimorphic map distances in a passerine bird
Author
Summary, in English
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: 110.2 cM) compared to females (237.2 cM; 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.
Department/s
Publishing year
2005
Language
English
Pages
2289-2298
Publication/Series
Royal Society of London. Proceedings B. Biological Sciences
Volume
272
Issue
1578
Full text
- Available as PDF - 219 kB
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Document type
Journal article
Publisher
Royal Society Publishing
Topic
- Biological Sciences
Status
Published
Research group
- Molecular Ecology and Evolution Lab
ISBN/ISSN/Other
- ISSN: 1471-2954