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Indian Journal of Animal Research

The Efficacy of Three Different Estrus Synchronization Protocols on Reproductive Performance in Chinese Hu Sheep

DOI: 10.18805/IJAR.B-1328    | Article Id: B-1328 | Page : 407-411
Citation :- The Efficacy of Three Different Estrus Synchronization Protocols on Reproductive Performance in Chinese Hu Sheep.Indian Journal of Animal Research.2022.(56):407-411
Jingwen Qu, Xiuyuan Yin, Yongjun Li, Qiang Wang, Jian Wang, Xiaomei Sun yzliyongjun@163.com
Address : Key Laboratory for Animal Genetics and Molecular Breeding of Jiangsu Province, Department of Animal Science and Technology, Yangzhou University, Yangzhou-25009, China.
Submitted Date : 8-10-2020
Accepted Date : 13-01-2022
First Online:

Abstract

Background: The estrous synchronization has become a worldwide available solution for modern management and large-scale cultivation of sheep. The objective of the present study was to compare the efficacy of three estrus synchronization protocols, CIDR9+PGF2α+eCG; CIDR14+eCG and GnRH+PGF2α, in Hu sheep.
Methods: This study was conducted on 80 multiparous ewes, which were assigned into four groups: CIDR9+PGF2α+eCG; CIDR14+eCG; GnRH+PGF2α and control. Behavioral estrus was checked with teaser rams. Percentage of ewes behaving estrus at different time (0-24 h, 24-48 h, 48-72 h, respectively) was recorded. Pregnancy diagnosis was implemented on day 28 and confirmed on day 60 after insemination. 
Result: The results suggested that the estrus rate, pregnancy rate, conception rate, lambing rate and prolificacy in three treatment groups have no significant difference compared with control group. Most notably, CIDR9+PGF2α+eCG and CIDR14+eCG have significantly shorter duration of pregnancy than control. While CIDR14+eCG and GnRH+PGF2α did not dramatically change the fecundity of ewes, still CIDR9+PGF2α+eCG significantly decreased the fecundity of that compared with the control. Estrus responses in CIDR9+PGF2α+eCG, CIDR14+eCG and GnRH+PGF2α groups rose gradually to attain their significantly higher percentages (56.3%, 52.9% and 66.7%, respectively) during 24-48 h post-estrous detection, afterwards, they fell down.

Keywords

CIDR GnRH Reproductive performance Synchronous estrus

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