Relevance. The article provides a justification for the use of sheep selection taking into account intra-breed type Prekos ewes in purebred breeding and crossing with producers semi-fine wool breeds Romney-Marsh Kuibyshevskaya to improve biological usefulness meat offspring. Methods : scientific economic experiment different options, productive Precos breed. Results. presents results study on i...

Two / 2 East Friesian (EF), one / 4 EF, one / 8 EF, and several Dorset rams were mated to crossbred ewes from 1993 through 1996. Growth, reproduction, and lactation performance of their progeny were compared. EF-cross lambs had greater birth, weaning, and postweaning weights than Dorset-cross lambs. When lambing at one and two years of age, EF-cross ewes gave birth to and reared more lambs per ...

Ovulation rate (OR) and litter size (LS) were recorded in local hair sheep of Martinique and in local x Lacaune-viande crossbreeds, in order to assess prenatal losses. Local hair sheep LS and OR were 1.91 and 2.41, respectively. Prenatal losses increased with OR, from 0.22 (OR = 2) up to 1.50 (OR > 3). The ewes (69.7%) with LS = 1 had actually lost at least one ovum, against 25.9% of the ewes w...

This study aimed to evaluate the rumen protective effectiveness of L-carnitine through in vitro tests, degradation tests and vivo tests. Twelve rumen-fistulated crossbred rams with similar body weights 55±3.6 kg ages 3±0.2 years old were divided into three treatment groups a 3×3 Latin square design, G1 (basal diet no additives), G2 (unprotected L-carnitine) or G3 (rumen-protected L-carnitine). ...

this study was carried out on 10 crossbred male sheep aged 1-1.5 year. an innervated crosskopf abomasal fundic pouch was made in each animal and effect o f starvation an d feeding on abomasal volume and composition were assesed . the results indicated that during starvation, volume of secretion , total acidity and k concentration decreased to a low level, while ph and na concentration reached h...

OBJECTIVE The objective of this study was to compare the DNA methylation profile in the longissimus dorsi muscle between Small Tailed Han and Dorper×Small Tailed Han crossbred sheep which were known to exhibit significant difference in meat-production. METHODS Six samples (three in each group) were subjected to the methylated DNA immunoprecipitation sequencing (MeDIP-seq) and subsequent bioin...

The growth, development and meat qualities characteristics of different genotypes lambs he growth features three ram-lambs, from their birth to six months age, were studied, in particular: purebred youngling the Ascanian Fine-Fleeced breed (AFF), a cross this gene pool with Texel (AFFxT) Merinolandschaf (AFFxM) breeds. Control over these experimental animals was carried out by weighing age peri...