Vol. 11, Special Issue 7 (2022)

Author(s):
Anil Kumar Reddy Kanduri, KCS Reddy, Venkata Ramana K, Venkateshwarlu M, Swathi B and Uday Kannegundla

Abstract:
The present study was conducted to estimate the efficacy of various estrus synchronization protocols on estrus response and progesterone profile in Mahabubnagar local goats. A total of 100 does aged between 2-5 years located at Livestock Research Station, Mahabubnagar were selected and randomly divided into 5 groups each with 20 does. First group were not treated with any protocol and considered as control. Second group (GPG) were treated with GnRH on day 0, PGF₂α on day 7 and GnRH on day 9. Third group (PPG) were treated with PGF2α on day 0, 7 and GnRH on day 9. Fourth group (SPG) were inserted with vaginal sponges and kept in situ for a period of 9 days, PGF₂α was given on day 8, on 9^th day sponges were withdrawn and GnRH was administered. Fifth group (SP) does were inserted with vaginal sponges for 9 days, on 9^th day sponges were removed and PMSG was administered. Estrus response was observed from day 9 to 14 and allowed for natural service. Synchronization protocols resulted significantly (p<0.05) higher estrus response rate than the control group. The onset of estrus was significantly (p<0.05) lower in the treatment groups and duration of estrus was significantly (p<0.05) higher in treated groups. The progesterone profile estimated at different time intervals on day 0, 3, 6 and 9 were shown significant (p<0.05) difference between the groups while, there was no significant (p<0.05) difference on day of estrus. In conclusion, the results of the present investigation revealed that SP group treatment regimen was the best in terms of estrus traits and reproductive performance in does followed by GPG, PPG and SPG groups.