Rapid Identification of Major Histocompatibility Complex Class I Haplotypes Using Deep Sequencing in an Endangered...

Area of Science:

• Primate immunogenetics
• Conservation genomics
• Molecular anthropology

Background:

• Obtaining immunogenetic data from wild primates is challenging due to logistical and methodological hurdles.
• The Major Histocompatibility Complex (MHC) plays a crucial role in immune response and is highly variable.
• Understanding MHC diversity is vital for the conservation of endangered species.

Purpose of the Study:

• To assess the feasibility of using a deep sequencing method for MHC I typing in wild red colobus.
• To identify MHC I-A/B haplotypes in a wild red colobus population.
• To evaluate the potential of this method for application in other endangered wild primates.

Main Methods:

• Application of a deep sequencing method, previously established for macaques, to wild red colobus samples (blood and tissue).
• Analysis of sequence data to identify and classify red colobus MHC I alleles across six loci.
• Haplotype assignment for ten individuals based on sufficient sequencing data.

Main Results:

• Successful identification of 82 red colobus MHC I alleles across six loci.
• High sequencing depth per individual, averaging approximately 13,000 reads across the six MHC I loci.
• MHC I-A and MHC I-B loci accounted for 83% of all identified alleles, indicating their dominance.

Conclusions:

• The deep sequencing approach is feasible for MHC I typing and haplotype identification in wild red colobus.
• This study advances MHC genotyping capabilities for the endangered red colobus.
• The methodology holds significant potential for application in MHC studies of other threatened wild primate populations.