Journal Article

A Triad of Highly Divergent Polymeric Immunoglobulin Receptor (PIGR) Haplotypes with Major Effect on IgA Concentration in Bovine Milk

Palmer, David, Obolonkin, Vladimir, Thomas, Natalie, Georges, Michel, Kelly, Van, Sanders, Kathryn, Berry, Sarah, Davis, Stephen, Coppieters, Wouter, Spelman, Richard, Burrett, Alayna, Lehnert, Klaus, Snell, Russell

2013

Overview

The aim of this study was to determine a genetic basis for IgA concentration in milk of Bos taurus. We used a Holstein-Friesian x Jersey F2 crossbred pedigree to undertake a genome-wide search for QTL influencing IgA concentration and yield in colostrum and milk. We identified a single genome-wide significant QTL on chromosome 16, maximising at 4.8 Mbp. The polymeric immunoglobulin receptor gene (PIGR) was within the confidence interval of the QTL. In addition, mRNA expression analysis revealed a liver PIGR expression QTL mapping to the same locus as the IgA quantitative trait locus. Sequencing and subsequent genotyping of the PIGR gene revealed three divergent haplotypes that explained the variance of both the IgA QTL and the PIGR expression QTL. Genetic selection based on these markers will facilitate the production of bovine herds producing milk with higher concentrations of IgA.

• Publisher: Public Library of Science,Public Library of Science (PLoS)
• Subject: Agriculture / Analysis / Animal lactation / Animals / Biology / Bos taurus / Cattle / Chromosome 16 / Chromosome Mapping / Chromosomes, Mammalian / Colostrum / Colostrum - chemistry / Confidence intervals / Cow's milk / Dairy industry / Ethics / Fc receptors / Female / Fourier transforms / Gene Expression / Gene mapping / Gene sequencing / Genes / Genetic aspects / Genetic Association Studies / Genetics & genetic processes / Genomes / Genomics / Genotype / Genotyping / Génétique & processus génétiques / Haplotypes / Immunoglobulin A / Immunoglobulin A - analysis / Immunoglobulin A - metabolism / Immunoglobulin A/analysis/metabolism / Immunoglobulins / Life sciences / Liver - metabolism / Liver - pathology / Liver/metabolism/pathology / Livestock / Milk / Milk - chemistry / Mutation / Parameter estimation / Pedigree / Phenotype / PigR gene / Product differentiation / Quantitative genetics / Quantitative Trait Loci / Receptors, Polymeric Immunoglobulin - genetics / Receptors, Polymeric Immunoglobulin - metabolism / Receptors, Polymeric Immunoglobulin/genetics/metabolism / RNA / Sciences du vivant / Secretory Component - genetics / Secretory Component - metabolism / Secretory Component/genetics/metabolism / Veterinary medicine