Genetic admixture and performance diversity of high yielding dairy cows surrounding the Baghabari Milk Vita areas of Bangladesh
Keywords:milk production, genetic dilution, repeat breeding, artificial insemination, dairy breed
This study was planned to clarify the recent milk and reproductive performances of high yielding dairy crossbreds based on various genotype, parity and location beside the Baghabari Milk Vita areas of Bangladesh. Performance records were collected from total 81 crossbred cows from both 15 households in Sirajgonj and Pabna districts, and six bathan areas at Sirajgonj. Genetic admixture of various breeds identified in the studied areas showed diverse performance. Milk production not varied statistically (16.27 to 19.33 liters per day as peak) either for genotype, parity or region but differed in number of AI services for last pregnancy in L×HF×SL (1) and L×HF×JE (2.18) genotypes at household level. Average 70 days observed between the day of calving and next fertile AI service in dairy farming. The study on bathan revealed about 23 months for age at first fertile AI in high yielding dairy cows with average 1.92 AI services per cow for last conceive. Peak milk production identified in HF crossed with local than HF×SL and JE genotypes. Screening, record keeping and controlled AI or mating with specific targeted breed could increase breed uniformity and productivity of high yielding crossbreds not only in Milk Vita region but also other milk pocket areas of this country. In addition, breed composition study is required for ensuring specific breed effects on production performance to design a planned breeding for sustainable dairy breed development in Bangladesh.
Asian J. Med. Biol. Res. March 2017, 3(1): 127-133