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Development and mapping of polymorphic microsatellite markers derived from a chicken brain cDNA library
C P Ruyter-Spira1, R P Crooijmans, R J Dijkhof
1Department of Animal Breeding, Wageningen Institute of Animal Sciences (WIAS), Wageningen Agricultural University, The Netherlands.
Animal Genetics
|August 1, 1996
Summary
This study introduces expressed sequence tags (ESTs) to chicken genetic mapping, enhancing comparative studies and candidate gene detection for quantitative trait loci (QTLs). Fifteen new microsatellite markers were successfully mapped, improving the chicken genetic linkage map.
Area of Science:
- Genomics
- Molecular Biology
- Animal Genetics
Background:
- Chicken genetic maps traditionally rely on random genomic markers.
- Expressed sequence tags (ESTs) are crucial for comparative mapping and identifying genes linked to traits (quantitative trait loci, QTLs).
Purpose of the Study:
- To develop and map expressed sequence tag-derived microsatellite markers in the chicken.
- To enhance the chicken genetic linkage map for future comparative genomics and QTL analysis.
Main Methods:
- Utilized a (TG)13 repeat probe to identify microsatellites in a chicken brain cDNA library.
- Sequenced cDNA clones, developed PCR primers, and tested for polymorphism.
- Mapped 15 microsatellite markers to international reference families.
Main Results:
- Identified microsatellites in 0.15% of cDNA clones; 21 were polymorphic.
- Successfully mapped 15 microsatellite markers to the chicken genetic linkage map.
- Seven ESTs showed significant homology to sequences in other species, with three being mapped.
Conclusions:
- The integration of ESTs significantly advances chicken genetic mapping capabilities.
- This improved map facilitates comparative genomics and the identification of candidate genes for important agricultural traits.
- The study highlights the value of ESTs for future genetic research in chickens.