author(s)
V Praveen, M Narayana Swamy, GP Kalmath, HS Shwetha, Veena MP, Hanamanta Nyamagonda and HS Maneesha

abstract
The study was undertaken to determine and compare the serum lipid and mineral profiles in different breeds of cattle such as Amrit Mahal, Holstein Friesian crossbred and Jersey crossbred animals. A total of eighteen cows belonging to three breeds with six cows in each breed in their third lactation were selected for the study and were divided into three groups as Group I (Amrit Mahal), Group II (Holstein Friesian crossbred) and Group III (Jersey crossbred). Blood and milk samples obtained at 4^th, 8^th and 12^th week were utilized for determination of lipid and mineral profiles with the help of commercial reagent kits using Microlab 300 semi-automated biochemical analyser. The serum cholesterol, triglycerides, calcium, phosphorus, sodium and potassium were significantly (P<0.05) higher in Amrit Mahal cows compared to Holstein Friesian crossbred and Jersey crossbred cows. However, non-significant (P>0.05) differences in phosphorus and magnesium levels were observed during different weeks of lactation in all the three breeds of cattle. The serum total cholesterol levels were significantly (P<0.05) higher during 12^th week compared to 4^th week of lactation in all breeds of cattle. However, the triglyceride levels were significantly (P<0.05) higher during 4^th week compared to 12^th week of lactation in Amrit Mahal and Jersey crossbred cows but not in Holstein Friesian crossbred cows. It is concluded that most of the serum lipid and mineral profile were significantly lower in crossbred cows compared to indigenous cows which could be related to their genetic potential compared to indigenous cattle or to the adaptability in the tropical climate.