Vol. 11, Special Issue 12 (2022)

Author(s):
K Senthilkumar, M Selvaraju and R Ezakial Napolean

Abstract:
A study was conducted on synchronization of ovulation protocols during winter and summer seasons in Tellicherry goats. Total of 60 Tellicherry does were selected. Out of this 30 does during winter season and the remaining 30 does during summer season. The selected does of each season were divided into three experimental groups viz., Groups I(Control group), II and III (Treatment groups). In Group II, all the does were treated with Ovsynch protocol. In group III, does were treated with Cosynch protocol. AI was done 16-18 hrs in Group I and at the time of second GnRH in group II. The does of group I was observed for oestrus from the time of selection during each season and was bred by AI during the observed oestrus. During winter season, the overall percentage of kidding rates were 50.00 in group I; 70.00 in group II; 60.00 in group III. The corresponding values in groups I, II and III during summer season were 50.00; 60.00; 50.00 per cent, respectively. The overall kidding rates recorded following synchronization of does were 60.00 and 53.33 per cent during winter and summer seasons, respectively. From this study, it was concluded that the entire synchronization programme employed in this experiment improved the kidding rates in Tellicherry does.