Occurrence of the αS1-casein D allele (formerly "welsh" variant) in sheep breeds Tsigai, Improved Valachian and Slovak Merino was investigated by means of isoelectric focusing in ultra thin polyacrylamide gel. This variant in herds of the above mentioned breeds was observed as follows: Improved Valachian 3.64%; Tsigai 5.57%; Slovak Merino 12.45%. In the last mentioned breed in a single animal α...

knowledge on animal requirement, available forage and its quality is fundamental for successful livestock and range management. since sheep is dominant grazing animal of rangelands in iran and there are over 27 sheep breeds and each breed has special body size, physiological condition and consequently different daily nutrition requirement, animal unit should be determinated for dominant breed o...

The melanocortin 1 receptor (MC1R) gene has been described as responsible for the black color in some breeds of sheep, but little is known about its function in many colored breeds, particularly those with a wide range of pigmentation phenotypes. The Brazilian Creole is a local breed of sheep from southern Brazil that has a wide variety of wool colors. We examined the MC1R gene (Extension locus...

Abstract The whole blood potassium concentration has shown the bimodal distribution in sheep, which has been classified into LK and HK types; HK allele is recessive to LK with a single gene inheritance. This polymorphism showed different behavior in different environment, which could be due to adaptation process. This research was conducted on the Zel and kermani breed research station, which...

Thirty-two groups of six sheep, classified into three breed categories according to their weight class (L: light, one breed (n=7); M: medium light, two breeds (n=10); H: heavy, three breeds (n=15)) were tested for antipredatory behaviour towards seven stimulus regimes. Tests were performed on 2-5-years-old ewes with lambs inside standardised and fenced home pastures. Stimulus regimes were: man ...

This study evaluated The association of breed, sex, age and location herd/flock (Village. peri-urban sales point) with prevalence distribution ticks in sheep goats Abeokuta its environs, A total 300 were randomly selected from the three locations. estimated age, breeds each animal determined. Thereafter, they examined for presence ticks, Ticks collected into universal bottles containing 1% form...

b) Numbers. The total sheep population in the Chokla distribution area was 0.53 m according to the 1972 census and 0.511 m according to the 1977 census, thus showing a slight decline. Of these, adult males and adult females were 0.049 and 0.352 m respectively. Chokla is perhaps the finest carpet-wool breed, although most Chokla wool is now being diverted to the worsted sector because of the dea...

This short history of the Dorper sheep traces its background and the steps taken to develop that breed in South Africa. The most important traits considered for the developing of the Dorper are listed and the breeding system outlined. The development of the White Dorper is also detailed and the breed improvement programs are indicated.

BACKGROUND The variability in the clinical or pathological presentation of transmissible spongiform encephalopathies (TSEs) in sheep, such as scrapie and bovine spongiform encephalopathy (BSE), has been attributed to prion protein genotype, strain, breed, clinical duration, dose, route and type of inoculum and the age at infection. The study aimed to describe the clinical signs in sheep infecte...

involved in choosing appropriate criteria and procedures for problem~ ses of breed and mating system evaluation experiments in sheep are. nom lC ana iiterature is rev1ewed of expenments 1n Wh1Ch blOlog1cal or econom1C scn bed . has been investigated. The .range in relative economic merit from the lCl ency the best group in an expenment tYP1cally 1S from 100 to 120, w1th rest to 140 not uncommon...