The bovine CXCR1 gene is highly polymorphic
Gina M Pighetti1, Cheryl J Kojima, Leszek Wojakiewicz
1The University of Tennessee, Department of Animal Science, 104 McCord Hall, 2640 Morgan Circle, Knoxville, TN 37996, USA. pighetti@utk.edu
Veterinary Immunology and Immunopathology
|November 8, 2011
Summary
Researchers identified 36 single nucleotide polymorphisms (SNP) in the bovine CXCR1 gene of Holstein cows. These genetic variations, including those altering protein function, offer potential for improving mastitis resistance through genetic selection.
Area of Science:
- Animal Genetics
- Immunology
- Molecular Biology
Background:
- Single nucleotide polymorphisms (SNP) in the bovine CXCR1 gene are linked to mastitis resistance and milk somatic cell counts in Holstein dairy cows.
- A deeper understanding of these genetic variations is crucial for improving herd health and productivity.
Purpose of the Study:
- To identify and characterize single nucleotide polymorphisms (SNP) within the coding and flanking regions of the bovine CXCR1 gene.
- To analyze the functional impact of identified SNP on protein structure and signaling pathways.
- To develop haplotype-based genetic markers for potential use in marker-assisted selection.
Main Methods:
- Sequencing of the bovine CXCR1 gene in 88 Holstein dairy cows.
- Identification and analysis of single nucleotide polymorphisms (SNP).
- Haplotype analysis using representative 'tag' SNP.
Main Results:
- Thirty-six SNP were identified in the bovine CXCR1 gene.
- Four SNP resulted in amino acid substitutions, with two impacting key signaling domains.
- One SNP introduced an early stop codon.
- Four major haplotypes, representing 99% of the population, were identified.
- Haplotypes derived from tag SNP correlated with those from functional SNP.
Conclusions:
- The bovine CXCR1 gene exhibits high polymorphism, offering significant potential for genetic selection strategies.
- Understanding CXCR1 gene variations can aid in identifying host factors influencing infection susceptibility.
- These findings contribute to genetic approaches for enhancing mastitis resistance in dairy cattle.
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