FROZEN SEMEN PRODUCTION PERFORMANCE OF KARAN FRIES BULLS

Abstract

A study was conducted to assess semen output characteristics of 4648 ejaculates of 52 Karan Fries bulls (Holstein Friesian crossbreds with 50 to 75% exotic inheritance) maintained at Artificial Breeding Research Centre, NDRI, Karnal, India. The objective of this study was to estimate expected frozen semen dose production. Semen production data were analysed using standard statistical tools. Age of the Karan Fries bulls (KF) at the time of collection ranged from 1.90 to 8.13 years, with a mean of 3.32±0.18 years. The average ejaculate volume (VOL, ml), mass activity (MA), initial motility (IM, %), sperm concentration per ml (SPC, millions) and total sperm output per ejaculate (SPCE, millions) from 52 KF bulls were 4.68±0.14 (2.74 - 6.98); 2.84±0.02 (2.57 - 3.08); 65.55±0.01 (61.40 - 69.65); 965.71±7.61 (865 - 1067.72) and 4516.90±128.34 (2600 - 6603.41, respectively). The average dilution rate for preservation was found to be 1: 12.07±0.10 with a range of 1:10.81 to 13.35. The expected number of ejaculates that could be frozen per year per bull was 44.46 (21 - 90) and correspondingly expected frozen dose produced per year per bull could be 10048.39 (3500 - 24669) in Karan Fries bulls.