Related Experiment Video
Updated: May 17, 2026
11:17
Stability and Structure of Bat Major Histocompatibility Complex Class I with Heterologous β2-Microglobulin
Published on: March 10, 2021
Microsatellite variation in the equine MHC.
C L Brinkmeyer-Langford1, J J Cai, C A Gill
1Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843-4458, USA. cbrinkmeyer@cvm.tamu.edu
Animal Genetics
|October 12, 2012
Summary
New genetic markers in the equine lymphocyte antigen (ELA) region, including microsatellites, reveal significant genetic variation. This variation is crucial for understanding horse immune responses to pathogens and disease resistance.
Area of Science:
- Genetics
- Immunology
- Equine Science
Background:
- The Major Histocompatibility Complex (MHC) is critical for immune responses.
- Genetic variation within MHC influences individual animal immunity to pathogens.
- Comprehensive documentation of MHC genetic variation is lacking for most domestic animals, including horses.
Purpose of the Study:
- To develop novel genetic markers for the equine MHC (Equine Lymphocyte Antigen - ELA).
- To investigate linkage disequilibrium (LD) and haplotype structure within the ELA region.
- To enhance the study of immune variation and disease resistance in horses.
Main Methods:
- Identification of 37 polymorphic microsatellite repeats within the ELA region.
- Genotyping of microsatellites and published single nucleotide polymorphisms (SNPs).
- Analysis of linkage disequilibrium (LD) and haplotype structure in Thoroughbred horses.
Main Results:
- Microsatellite markers, alone or combined with SNPs, revealed substantial linkage disequilibrium (LD) in ELA.
- ELA SNPs alone showed limited LD.
- A subset of ELA markers demonstrated very high LD, potentially predicting structural polymorphisms or epistatic interactions.
Conclusions:
- Novel microsatellite markers significantly improve the detection of LD within the equine MHC (ELA).
- High LD in specific ELA marker subsets may drive haplotype structure and influence immune responses in Thoroughbreds.
- These findings provide valuable genetic tools for equine immunology and breeding research.
More Related Videos
Related Concept Videos
01:05Single Nucleotide Polymorphisms-SNPs
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
02:30Histone Variants at the Centromere
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3 variants are also...