Vol. 11, Special Issue 6 (2022)

Author(s):
Kartik Tomar, Raj Kumar, Kuldeep Kumar Tyagi, Atul Gupta, SP Yadav, DS Sahu, Deepak Singh, Karunesh Kumar Dubey and Komal Singh

Abstract:
The data of 655 Hariana cattle on first lactation and lifetime production and reproduction reared during 1965-2020 at State Livestock and Agriculture Farm, Babugarh, Hapur, India was used for least square analysis. The overall least square means for first lactation traits viz. Age at First Calving, Total Lactation Milk Yield in Pail, First Standard Milk Yield in Pail, First Calving Interval, First Dry Period, First Lactation Length and First Service Period were found to be 1580.16 ± 12.20 days, 954.66 ± 19.79 kg, 857.92 ± 14.73 kg, 523.42 ± 6.86 days, 181.09 ± 5.16 days, 343.18 ± 4.81 days and 240.79 ± 7.22 days respectively. Least square estimates for lifetime traits viz. Breeding Efficiency by Tomar method, Breeding Efficiency by Wilcox method, Herd Life, Productive Days, Productive Life, Unproductive Days, Total Lactation Milk Yield in Pail, Total Standard Lactation Milk Yield in Pail, Total Lactation Milk Yield in Pail / Herd Life, Total Lactation Milk Yield in Pail / Productive Days and Total Lactation Milk Yield / Productive Life in Pail were 79.54 ± 0.47%, 76.98 ± 0.73%, 4241.91 ± 33.19 days, 1633.53 ± 23.95 days, 2392.06 ± 30.34 days, 758.53 ± 17.87 days, 5365.85 ± 113.60 kg, 5179.09 ± 97.08 kg, 1.17 ± 0.02 kg/day, 3.10 ± 0.04 kg/day, 2.16 ± 0.03 kg/day respectively. Various fixed factors used in the model were found to be significantly affecting first lactation and lifetime traits except for few. The estimated least square means for first lactation and lifetime traits will act as a baseline for animal breeders. The identified fixed factors significantly affecting first lactation and lifetime traits in Hariana cattle will be useful for standardization of data beforehand genetic analysis.