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Ahmad Ahmadi

Ahmad Ahmadi

Academic rank: Assistant Professor
ORCID:
Education: PhD.
ScopusId: 56640730100
HIndex:
Faculty: Faculty of Agriculture
Address:
Phone: 081 34424195

Research

Title
The effect of pre-breeding vitamin E and selenium injection on reproductive performance, antioxidant status, and progesterone concentration in estrus-synchronized Mehraban ewes
Type
JournalPaper
Keywords
Antioxidants . Dry pastures . Fertility . Selenium . Vitamin E
Year
2020
Journal TROPICAL ANIMAL HEALTH AND PRODUCTION
DOI
Researchers Abbas farahavar ، ، Daryoush Alipour ، Ahmad Ahmadi

Abstract

The present study was conducted to assess the effects of pre-breeding Vit E and selenium (ESe) injections on the reproductive performance, antioxidant status and serum progesterone (P4) concentration in estrus-synchronized Mehraban ewes. During the breeding season, 38 ewes (3-4 yrs.) were divided into two groups (n = 18) and the synchronization of oestrus was achieved by intravaginal insertion of 0.3g progesterone CIDR device for 13 days followed by 350 IU eCG at CIDR withdrawal. Ewes were kept under pasture conditions and exposed to Mehranan rams 48 hours following CIDR withdrawal. The experimental treatments were control and ESe injection. The ESe group was received three intramuscular (5 mL) injections of Ese (0.5 mg / mL of selenium as sodium selenite and 50 IU vitamin E as DL-α- tocopheryl) once every two weeks. Specifically, Ese was administered at two weeks before CIDR insertion, at the times of CIDR insertion and CIDR withdrawal. Fertility, prolificacy, lambing rate and birth weight were recorded after parturition. Blood samples were collected at CIDR insertion, CIDR withdrawal, 5, 10 and 15 days after ram exposure. Fertility, prolificacy, lambing rate and birth weight did not improve by Ese treatment, but lambs viability was higher in ESe than control (P < 0.05). Serum total antioxidant capacity at days 5 and P4 at days 10 after ram exposure were higher in ESe than control (P < 0.05). In conclusion, sheep breeders can use ESe at CIDR insertion and withdrawal times to potentiate antioxidant status and progesterone profile of oestrus synchronized Mehraban ewes.