Abstract
Repeat breeding reduces calf and milk production in crossbred cows. Serum lipid profiles in repeat breeding (RB) and normal cyclic (NC) cows were examined. Blood samples from 10 of each type cows were collected and TC, TG, HDL and LDL were estimated by spectrophotometer using enzymatic commercial kit. The serum TC in NC and RB were found within normal range (167.43 vs. 174.95mg/dl) (P>0.05). The TG in RB cows (121.92mg/dl) were significantly (P<0.05) higher than NC cows (115.03mg/dl). The HDL and LDL in NC (49.74 and 98.82mg/dl) and RB cows (46.40 and 103.09mg/dl) were found within normal range (P>0.05). Serum lipids have no effect on repeat breeding problem for crossbred cows.
 Asian J. Med. Biol. Res. June 2019, 5(2): 158-161
Highlights
Baghabari is one of the potential milk pocket areas in Bangladesh, as many small and large-scale crossbred dairy farms have been established there
The results obtained in this study reveal that the concentrations of TC in serum for repeat breeding cows were not significantly different from those of normal cycling cows
Hesti et al (2016) studied lipid profile of lactating Holstein fed two different diets and obtained serum concentration of high density lipoproteins (HDL) to be 70.52 and 67.48mg/dl which are somewhat higher than this study, but still within the normal range between 40-90mg/dl (Tighe and Brown, 2008) for dairy cows
Summary
Baghabari is one of the potential milk pocket areas in Bangladesh, as many small and large-scale crossbred dairy farms have been established there. According to Kumar and Sharma (1993), high incidence of repeat-breeding and anoestrous are associated with the deficiencies of cholesterol. Certain serum biochemical parameters of the RB have been examined and compared them with that of the NC crossbred cows in Baghabari, Shahzadpur, Sirajganj in where severe RB problem is in existence. To the best of our knowledge, this study is the first one that has examined the crossbred RB cow from a blood serum biochemical point of view. It is probably helpful in treatment of the RB syndrome by correcting the blood serum levels of cholesterol (TC), triglycerides (TG), high density lipoproteins (HDL) and low density lipoproteins (LDL)
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