Correction: First-time description of MHC diversity in Straight Egyptian Arabian horses using immune-linked microsatellite markers.

Overview

• This research article presents the first comprehensive analysis of Major Histocompatibility Complex (MHC) diversity in Straight Egyptian Arabian horses using immune-linked microsatellite markers, aiming to understand the genetic variability related to immune response in this specific horse breed.

Introduction

• The Major Histocompatibility Complex (MHC) is a critical part of the immune system that helps organisms recognize pathogens and mount immune responses.
• MHC diversity is essential for effective immune function, and its study can provide insights into disease resistance, breeding programs, and conservation strategies.
• Straight Egyptian Arabian horses are a distinct and historically significant horse breed known for unique characteristics and genetic heritage.
• Before this study, the MHC diversity in this breed had not been characterized, leaving a gap in the understanding of their immunogenetic profile.

Objective

• The main goal was to assess the diversity of the MHC region in Straight Egyptian Arabian horses using immune-linked microsatellite markers, which are molecular markers located near or within immune-related genes.
• This would provide the first detailed genetic profiling of MHC in these horses, potentially revealing their immune genetic variability and aiding in breed management.

Methodology

• Sampling: DNA samples were collected from a representative population of Straight Egyptian Arabian horses, ensuring genetic representation.
• Markers: A panel of immune-linked microsatellite markers, known to be associated with the horse MHC region, was selected for genotyping.
• Genotyping: Techniques such as PCR amplification and capillary electrophoresis were used to identify the microsatellite alleles.
• Data Analysis: MHC diversity measures—including allele frequency, heterozygosity, and haplotype diversity—were calculated to evaluate the genetic variability within the population.
• Comparisons: Results were compared to available data from other horse breeds to contextualize the findings.

Findings

• This study provided the first description of MHC diversity in the Straight Egyptian Arabian horses, identifying multiple alleles at each microsatellite locus.
• The breed showed a level of genetic variability in the MHC region, suggesting potential for good immune responsiveness.
• Some unique or breed-specific alleles or haplotypes were detected, which may be characteristic of their genetic lineage.
• Comparisons indicated differences in diversity levels compared to other breeds, highlighting the distinct immunogenetic profile of Straight Egyptian Arabian horses.

Significance and Implications

• Understanding MHC diversity is critical for disease resistance and health management in horse populations.
• This research fills a knowledge gap about the immune genetics of Straight Egyptian Arabian horses, a breed with cultural and historical importance.
• Data can inform selective breeding practices to maintain or improve immune competence and genetic health.
• The identified markers and alleles provide a resource for future studies on disease susceptibility, vaccine responses, and population genetics within this breed.
• The approach demonstrates the utility of microsatellite markers for immune-related genetic studies in equine breeds.

Correction Notice

• The article corrects a previous publication identified by the DOI: 10.3389/fimmu.2026.1859977.
• This correction ensures the accuracy and integrity of data regarding the MHC diversity study in this horse breed.