This review describes sheep genetic resources in Bulgaria with coloured wool and evaluates the country’s potential for production. In 2018, counted 125,422 animals belonging to 18 native breeds, six of which are danger extinction. Native breeds can be divided into three groups depending on fleece colour animals: i) fully pigmented all animals; ii) or white fleece; iii) spotted fleece. Colouration ...

Total litter weight weaned at 120 d postpartum per ewe lambing is often believed to be a measure of range ewe productivity. Genetic correlations for litter weight weaned at 120 d with prolificacy, growth, and wool traits for Columbia, Polypay, Rambouillet, and Targhee sheep were estimated using REML with animal models. Observations per breed ranged from 5,140 to 7,083 for litter weight weaned, ...

The article presents the results of studying fertilizing ability sperm ramsproducers different breeds. It was found that highest fertility on average for all seasons take used were characterized by sheep inseminated with semen Stavropol breed, a minimum – seed North Caucasus mutton-wool breed.

The Distal-less 3 (homeobox protein DLX-3), a transcription factor, is critical for the development of hair follicle and hair formation and regeneration. We previously identified and found that four SNPs (c. *118T>C, c. *228T>C, c. *688A>G and c. *1,038_1,039 insC) in 3' untranslated region (UTR) of sheep DLX3 were in high linkage disequilibrium with each other and significantly associated with...

Wool growth depends on hormones activity. Owing to hormonal status is extensively affected by surgical excision of endocrine glands, disease or severe congenital abnormalities, wool growth will be altered. This study intends to assess the effect of prepubertal castration at different ages on wool traits and testosterone with draw in male lambs. One month of age Ghezel male lambs (n=20) were sel...

The objective of this thesis was to better understand the epidemiology of caseous lymphadenitis (CLA) and its economic effects on the Australian sheep industries. The work also sought to apply this knowledge to better understand how to control the disease in Australian sheep flocks. The occurrence of CLA in some other species, as a comparison to CLA in sheep, is described in the literature revi...

A quantitative trait loci (QTL) analysis of wool traits from experimental half-sib data of Merino sheep is presented. A total of 617 animals distributed in 10 families were genotyped for 36 microsatellite markers on four ovine chromosomes OAR1, OAR3, OAR4 and OAR11. The markers covering OAR3 and OAR11 were densely spaced, at an average distance of 2.8 and 1.2 cM, respectively. Body weight and w...

The studies on physical properties of wool of six breeds of sheep of Punjab, Jammu and Kashmir. Sixty wool samples, 10 from such of the six breeds were selected to study the physical properties of wool. The study revealed that Dorset (exotic) had maximum staple length followed by Rambuillet (exotic) had maximum staple length followed by Rambuillet (exotic), i.e. 6.03 cm and 5.74 cm respectively...

The level of production by sheep that graze a Mediterranean pasture as it matures and senesces depends on diet selection. By estimatin, 0 diet selection under these conditions using 2 methods, we predict that the intake of nitrogen (N) and amount of N apparently digested (ADN) decreases as the pasture matures and senesces, but that it decreases at a slower rate than the decline in pasture N con...

Chaffed wheat straw was treated with a seven per cent solution of urea and sealed for three weeks before feeding to sheep. Mature wethers received either this urea-treated straw or straw that had received an equivalent amount of urea mixed in with it at feeding. Both straws were fed either with or without lupins at 200 g/hd/d for seven weeks. DM intake was increased both by the urea treatment a...