Didier Boichard

TL;DR: The 1000 bull genomes project supports the goal of accelerating the rates of genetic gain in domestic cattle while at the same time considering animal health and welfare by providing the annotated sequence variants and genotypes of key ancestor bulls.

TL;DR: Genetic parameters were estimated by restricted maximum likelihood with an animal model on first lactation data of 29,284 French Holstein cows for clinical mastitis, lactation somatic cell score, milking ease, production, and nine udder type traits to indicate that both traits were genetically favorably associated.

TL;DR: Improvement of selection accuracy for mastitis resistance is ongoing and includes: advances in modelling, optimal combination of mastitis related traits and associated predictors, such as udder morphology, definition of global breeding objective including production and functional traits, and inclusion of molecular information that is now available from QTL experiments.

TL;DR: This project of QTL detection was carried out in the French Holstein, Normande, and Montbéliarde dairy cattle breeds and confirmed several already published QTL but most of them were original, particularly for non-production traits.

TL;DR: Quantitative trait loci affecting milk production and health of dairy cattle were mapped in a very large Holstein granddaughter design, and some chromosomes showed some evidence for 2 linked QTL affecting the same trait.