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A microsatellite-based linkage map for song sparrows (Melospiza melodia)
Pirmin Nietlisbach1, Glauco Camenisch1, Thomas Bucher1
1Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland.
Molecular Ecology Resources
|April 14, 2015
Summary
Researchers developed 191 new microsatellite markers for song sparrows, creating a linkage map crucial for evolutionary studies. This map aids understanding of song sparrow genetics and comparative genomics across species.
Area of Science:
- Evolutionary Biology
- Genomics
- Population Genetics
Background:
- Linkage maps are vital for evolutionary biology but scarce for wild populations.
- Song sparrows on Mandarte Island are a well-studied wild population with extensive pedigree data.
- Limited availability of genetic markers has hindered in-depth evolutionary and ecological studies in this population.
Purpose of the Study:
- To develop new genetic markers for song sparrows.
- To construct a high-density linkage map for song sparrows.
- To facilitate evolutionary and comparative genomic research in song sparrows.
Main Methods:
- Developed 191 new microsatellite loci (160 autosomal, 7 Z-linked, 1 W-linked).
- Constructed a song sparrow linkage map covering 35 linkage groups.
- Bioinformatically mapped loci to the zebra finch genome for comparative analysis.
Main Results:
- A song sparrow linkage map of 1731 cM was created, covering most chromosomes.
- Linkage groups showed conservation with the zebra finch genome, with rearrangements in larger groups.
- Recombination frequency explained most gametic phase disequilibrium, with overlap between linked and unlinked loci.
Conclusions:
- The new microsatellite markers are valuable resources for song sparrow research.
- The linkage map provides a foundation for future evolutionary and ecological studies.
- Conserved linkage groups facilitate comparative genomics between song sparrows and other avian species.
