Relationships between Milk Yield, Post-Partum Body Weight and Reproductive Performance in Friesian x Bunaji Cattle

Genetic and Non Genetic Sources of Variation for Linear Body Conformation Traits in Bunaji and Friesian X Bunaji cows

“…The study was conducted on the dairy herd of the National Animal Production Research 00 Institute (NAPRI) Shika, Nigeria, located between latitude 11 and 12 N at an altitude of 640m above sea level, and lies within the northern guinea savannah zone (Oni et al, 2001). The mean annual rainfall in this zone is 1,100m which commence from May and last till October, of which 90% falls during the wet rainy season (June September).…”

Impact of Blood Metabolite Profile and Milk Yield on Fertility of Dairy Cows

“…Milk yield being a multifactorial trait, is dependent upon genetics, breed, age, parity, stage of lactation, season, health status and nutritional as well as managemental factors. High milk yield has been linked with reduced fertility (Berger et al, 1981) and prolonged calving interval in cows (Oni et al, 2001). Conception failure in cows with high milk yield could be attributed to the antagonistic action of relatively enhanced level of prolactin on GnRH.…”