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Discrimination between selected lines of pigs using AFLP markers.
N D Cameron1, M J T van Eijk, B Brugmans
1Roslin Institute, Roslin EH25 9PS, UK. n.cameron@ed.ac.uk
Heredity
|October 25, 2003
Summary
Amplified fragment length polymorphic (AFLP) markers effectively distinguished pig lines selected for lean growth. This genetic marker technology accurately grouped animals, confirming distinct selection outcomes.
Area of Science:
- Animal Genetics
- Molecular Biology
- Quantitative Genetics
Background:
- Divergent selection in livestock aims to improve specific traits.
- Genetic markers are crucial for understanding population structure and selection responses.
Purpose of the Study:
- To assess the efficacy of Amplified Fragment Length Polymorphism (AFLP) markers in discriminating pig lines selected for lean growth.
- To evaluate the genetic differentiation among pig lines subjected to seven generations of divergent selection.
Main Methods:
- Genotyping of 270 pigs (30 per line) using 239 polymorphic AFLP markers.
- Application of Canonical Variate Analysis and Cluster Analysis on AFLP marker data.
- Utilizing EcoRI and TaqI restriction enzymes for AFLP analysis.
Main Results:
- AFLP markers successfully grouped animals according to their selection line with no overlap.
- Cluster analysis revealed 10 distinct groups, with 226 animals accurately assigned to their respective selection lines.
- High discriminatory power of AFLP markers was demonstrated for differentiating selection lines.
Conclusions:
- AFLP genotyping is a powerful tool for distinguishing pig populations with different selection histories.
- The study confirms the genetic divergence achieved through selective breeding for lean growth components.
- AFLP markers provide a reliable method for population genetics studies in pigs.