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Double-strand DNA conformation polymorphisms as a source of highly polymorphic genetic markers
B W Kirkpatrick1, B M Huff, E Casas-Carrillo
1Department of Meat and Animal Science, University of Wisconsin, Madison 53706.
Animal Genetics
|June 1, 1993
Summary
Researchers identified DNA changes causing variations in the porcine growth hormone gene. These findings enable the development of advanced genetic markers for swine breeds.
Area of Science:
- Genetics
- Molecular Biology
- Animal Science
Background:
- Restriction fragment length polymorphisms (RFLPs) are commonly used genetic markers.
- Understanding the molecular basis of these polymorphisms is crucial for marker development.
- The porcine growth hormone (pGH) gene is a target for genetic studies in swine.
Purpose of the Study:
- To investigate the molecular basis of RFLPs in the porcine growth hormone gene.
- To identify novel genetic variations and develop a robust marker system for swine genetics.
Main Methods:
- DNA sequence analysis of the porcine growth hormone gene.
- Electrophoretic analysis to assess DNA conformation and mobility.
- Development of a marker system combining DNA conformation polymorphisms with RFLPs (HaeII and DdeI).
Main Results:
- Apparent RFLPs are attributed to 1-3 base substitutions altering DNA conformation and electrophoretic mobility.
- Two allelic forms in the pGH 5' flank and four in the second exon/intron region were identified.
- A novel marker system revealed nine haplotypes across three US swine breeds.
Conclusions:
- DNA double-strand conformation is a valuable characteristic for detecting base substitutions.
- The developed marker system offers high polymorphism and utility for swine genetic studies.
- This approach enhances the development of sophisticated genetic marker systems in livestock.