Body Condition Score and Dairy Form as Indicators of Dairy Cattle Disease and Reproductive Performance.

摘要: The objectives of this research were to estimate heritabilities and correlations between body condition score (BCS) from various sources, determine the genetic relationship among BCS, dairy form, cow health reproductive performance investigate models analyze BCS form. was obtained herds using PCDART management software linear type appraisals by Holstein classifiers. Cow data several recording disease treatments. Genetic evaluations for in Denmark also obtained. Reproductive yield provided DRMS AIPL-USDA. Heritabilities traits estimated with REML animal sire models. Random regression repeatability compared. Fixed effects all included contemporary group effects, age, days milk (DIM) when available. or error. heritability appraisal 0.22. correlation records 0.87, form –0.72 strength 0.69. estimates random DIM 0 lactation 1 305 3 be 0.77 0.60 Higher lower significantly correlated yield, less metabolic fewer open. remained significant after adjustment yield. tended non-significant Supplementing direct open increased reliability an average 0.06 19 recently proven bulls. Selection higher will slow deterioration that accompanies selection