RT Journal T1 Efficacy of Short-Term Estrus Synchronization Protocols and Timed Artificial Insemination in Subtropical Goats A1 S. M. H. Andrabi A1 M. Anwar A1 A. Mehmood JF Journal of Animal and Plant Sciences JO JAPS SN 1018-7081 VO 25 IS 1 SP 293 OP 300 YR 2015 FD 2015/02/01 DO DOI NA AB

The present study was performed to assess the efficacy of two short-term estrus synchronization protocols at farm vs. field conditions in subtropical goats (n=39) during peak breeding season. Group one was treated with double IM injection of 75 µg cloprostenol (prostaglandin F2 alpha analogue) at 9 days interval. In group two, estrus was synchronized with injection of 25 mg progesterone (IM), and an injection of cloprostenol at 9 days interval. Timed artificial insemination (TAI) was conducted after 48 h of last cloprostenol injection, followed by 2nd TAI after 12 h with chilled semen. Pregnancy test was performed with ultrasonography at 45 days post-insemination. Estrus was induced in all the animals (100%), irrespective of treatment (double cloprostenol vs. progesterone + cloprostenol) or location (farm vs. field). Treatment and location did not affect estrus onset, estrus duration, pregnancy rate, kidding rate and litter size (p>0.05). However, a trend was evident from the overall values that there was a narrower range in double cloprostenol than progesterone + cloprostenol treated groups in estrus onset (24-37 h vs.18-48 h) and estrus duration (36-60 h vs. 24-96 h). Similarly overall pregnancy rate (78.9% vs. 55%) and kidding rate (68.4% vs. 45%) were higher in double cloprostenol treated does as compared to the progesterone + cloprostenol treated group. In conclusion, the two short-term estrus synchronization protocols evaluated in the present study can be used in subtropical goats during the peak breeding season.

K1 Estrus synchronization, TAI, goats, subtropical PB Pakistan Agricultural Scientists Forum LK https://thejaps.org.pk/AbstractView.aspx?mid=2015-JAPS-41