Abstract

The study was conducted at Central Cattle Breeding and Dairy Farm in Savar, Dhaka to evaluate the reproductive performance of different crossbred cows in terms of gestation length, service per conception, postpartum heat period and calving interval. The genotypes Australian Friesian Sahiwal (AFS), Sahiwal × Friesian (SL×F), Local × Friesian (L×F), Local × Friesian × Friesian (LF₁×F) and Local × Friesian × Friesian × Friesian (LF₂×F) were considered. The highest performance for the trait service per conception was found in AFS (1.40±0.69) and the lowest performance was found in SL´F (1.80±0.63). The longest gestation length and calving interval were observed in SLxF, 281.0±3.26 and 542.0±9.87 days, respectively. The longest postpartum heat period (201.7±17.40 days) was found in LF₁´F cows. On the other hand, the shortest gestation length (277.0±5.21 days), postpartum heat period (135.5±10.58 days) and calving interval (436.07±9.87 days) were observed in L´F crossbred cows. From the above perspective it is concluded that L´F crossbred cows are more suitable for Bangladesh.

Key words: Reproductive, performance, crossbred, cows.