The influence of melatonin receptor 1A gene on litter size was studied in 150 ewes from Zel (n=100) and Naeini (n=50) sheep breeds. Two restriction fragment length polymorphism (RFLP) analyses were done to determine all genotypes occurring by variations at MnlI and RsaI restriction sites. The M and C were the most frequent alleles in both of these breeds. The MM genotype was predominant in Zel ...

In this study, 44 Afshari ewes were investigated that 1–4 years old with a mean weight of 54–51 kg, physical score approximately three in four experimental groups. Ewes randomly assigned into groups including Group A Control (base diet recipient), B (Flushing), C (Flushing + Vitamin E Supplement Organic Selenium), and D Mineral Selenium). Blood sampling was carried out at different intervals na...

Two groups of purebred ewes (A and B), each consisting of 25 Dorsets and 25 Hampshires, were used to study effects of ewe breed and ram exposure on ovulation and estrus in May and June. Ewes lambed in January and February and were isolated from mature rams for at least 5 mo. From May 8 to June 11 (Period 1), Group A ewes were penned with vasectomized rams fitted with marking harnesses and Group...

BACKGROUND The gullet worm, Gongylonema pulchrum Molin, 1857, is a thread-like spirurid nematode found in a variety of mammals worldwide. Its incidences in Iranian cattle of different breed or age have not been reported. The aims of the present study are to disclose the infection status of G. pulchrum in cattle slaughtered in northern region of Iran. METHODS Full-length esophagi of cattle of ...

This work was carried out with the objective of studying effect anti-reflux device for ovine insemination (DARIO) on fertility rate in ewes native Portuguese breed Churra Galega Bragançana (CGB) artificially inseminated at fixed-time. Eighty-one aged between one and five years were used. At end April 2021, ewes’ reproductive control out, using a short progestagen treatment (five days) + equine ...

This study was conducted to determine the effect of progestin source on some reproductive performance, lamb birth weight and mortality rate in Akkaraman ewes. A total 40 sheep breed with similar body (51.3 ± 1.5 kg) at least two parturitions were used as experimental animals. In all ewes, intramuscular injection PGF2α (2.5 mg) administered 96 hours before estrus synchronization obtain corpus lu...

A cohort study was conducted in order to measure the effect of the chronic indurative lymphocytic mastitis caused by the South African strain of maedi visna virus (MVV) on the pre-weaning growth of lambs born either of naturally infected or uninfected ewes kept under similar conditions. Fifty naturally infected ewes as well as another 40 from a maedi-visna-free source to be used as control anim...

A group of crossbred Dorset or Finnish Landrace ewes maintained under a synthetic light regimen (Light Treatment, 4 mo long days - 16 h light, 4 mo short days - 8 h light) and exposed to rams every 8 mo (January 1, September 1, May 1) was compared for lamb production over a period of 4.5 yr with two other comparable groups under natural daylight conditions, one exposed to rams once a year in th...