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Asian Journal of Applied Sciences
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Comparative Changes in Levels of Circulating Metabolic Biomarkers and Leptin Hormone in High and Low Yielding Breeds of Indian Dairy Cows During Pregnancy and Lactation

Vijay Pandey , Rambachan , Rajesh Nigam, Deepak Sharma, Satyendra Pal Singh and Madhu Tiwari

Background and Objectives: Changes in body condition and fat depots crucially affects the postpartum negative energy balance and succeeding milk production in dairy cows. Thus, this study was planned to elucidate the comparative changes in circulating levels of biochemical profile and leptin hormone during different physiological stages in high and low yielding breeds of Indian dairy cattle. Materials and Methods: Total 6 pregnant Sahiwal and Hariana cows of same age group (approximately 3-5 years) with similar body condition and in their first parity were selected. Blood samples were collected 1 month antepartum (dry) and 1st (early lactation), 2nd (early mid lactation) and 3rd month (late mid lactation) postpartum twice in a month (fortnightly). Plasma was harvested and analyzed for levels of leptin, glucose, urea, triglyceride (TG), cholesterol, High Density Lipoprotein (HDL), Low Density Lipoprotein (LDL) and non-esterified Fatty Acid (NEFA). Results: The significant lower levels of leptin, TG, cholesterol, HDL, LDL and NEFA were observed in high yielding Sahiwal cows compared to low yielding Hariana cows while period of lactation showed significant effect on all the parameters except leptin and NEFA in both the breeds. Interaction of breed and period revealed substantial effect on levels of TG, cholesterol, HDL and LDL. Conclusion: The study suggests their possible role in differential production potential of these high and low yielding animals. Moreover, further studies are warranted to explore the real cause of differential production potential of animals.
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