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GENETIC ARCHITECTURE OF BIRTH AND WEANING TRAITS IN CHAROLAIS BEEF CATTLE
Detection of quantitative trait loci (QTL) was carried out in the French Charolais beef breed for direct and maternal deregressed estimates breeding values (DEBV) for birth and weaning traits using Bayesian Spare Linear Mixed Model methodology. Data were analyzed for a total of 2,682 (direct DEBV) and 881 (maternal DEBV) animals genotyped or imputed for the BovineHD BeadChip. A QTL was assumed to have a strong evidence for a given location when a SNP had a Bayes Factor computed at a value above 150. Regarding direct DEBV, SNPs identified with a very strong evidence for a QTL were spanned over all chromosomes with common regions between traits. For maternal DEBV, fewer QTL were detected. To our knowledge, although a lot of QTL regions had already been reported, some new regions emerged from our study with candidate genes available.
Keywords:
QTL
Calving ease
Birth weight
Weaning weight
