Department of Animal Husbandry and Dairying, Marathwada Agricultural University, Parbhani - 431402, India.
The data on Holstein Friesian × Deoni (HF × D) straight breds from Cattle Cross Breeding Project and Agriculture College Dairy over a period of 15 years were considered for present investigation. In all the performance of 135 cows for first lactation were included in the study. The evaluation of age at first calving (AFC), first lactation milk yield (FLMY), first lactation peak yield (FLPY) and first lactation days required to reach peak yield (FLDRPY) was done. The least squares means (LSM) for AFC, FLMY, FLPY and FLDRPY were 1308.75 ± 176.44 days, 1589.35 ± 212.64 kg, 9.14 ± 2.20 kg and 21.59 ± 6.78 days, respectively. The farm effect was significant except for FLMY. The season had non-significant e{fects on all traits and period had significant effect except for FLDRPY in HF × D straight breds in first lactation.
