test (1) gène (1) ADN (1) distribution (1) bovins (1) méthode (1) bétail (bovins) (1) Swiss (1) Population (1) Performance (1) Milk yield (1) Lactation (1) Equilibrium (1) DNA (1) Days (1) Cattle (1) Buildings (1) Brown Swiss cattle (1) Brown (1) Population (1) Performance (1)