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Information × Registration Number 0221U102251, 0119U002089 , R & D reports Title To develop a methodology and methods for improving the meat productivity of the Ascanian Fine-Fleeced sheep breed popup.stage_title Head Zaruba Kostiantyn V., Кандидат сільськогосподарських наук Registration Date 29-01-2021 Organization MF Ivanov Askania-Nova Institute of Steppe Animal Husbandry - National Scientific Breeding and Genetics Center for Sheep Breeding popup.description2 The object of the research is the Ascanian Fine-Fleeced breed of sheep.Purpose of the work: Study of the using effectiveness the crossing the Ascanian Fine-Fleeced breed ewes with rams-sires of the Merino Landscape and Texel breeds.The effect of crossing the Ascanian Fine-Fleeced breed ewes with Merino Landscape and Texel breeds ram-sires on the reproductive qualities, growth, development and meat qualities of hybrid young sheep has been studied.It was found that the mating the meat genotypes ram sires with the Ascanian Fine-Fleeced breed ewes provides an increase in their reproductive capacity, fattening and meat qualities of offspring.An increase in multiple births was noted to 130.3-131.4% in ewes with crossbred lambs versus 119.5% with purebred lambs. Also, in ewes with crossbred lambs, there is an increase in daily milk production by 6.7-9.5%. Crossbred lambs surpass purebred lambs in live weight at birth by 8.9-15.6%.Indicators of live weight, absolute and relative gains in hybrid animals were higher in all periods of observation. At 4 months of age, crossbred sheep in live weight prevailed over purebred ones by 24.7 and 10.8%. The advantage of the lamb ewes’ ones was 18.3 and 2.1%. At 14 months in age, hybrid rams surpassed purebred animals in live weight by 13.0-14.3% (P> 0.999). The positive influence of crossing on the slaughter yield was established. In purebred young animals at 4.5 months age, this figure was 39.5%; for hybrids AFF×T - 44.9%, and for AF ×M - 42.4%. At 6.5 months of age, these indicators increase to 42.6 ... 47.3%, with a predominance of crossbred rams. By slaughter weight, crossbreds prevailed over purebreds at 4.5 months age by 15.4-20.2% (P> 0.95), and at 6.5 months by 18.2-26.3% (P> 0.95). Among crossbred animals, AFF×T rams had the best slaughter qualities. In terms of morphological and varietal composition, the carcasses of hybrid AFF×T rams also exceeded AFF×M and purebred Merino at 4.5- and 6.5-mon. age. Product Description popup.authors Vasylenko Tatjana V Drozd Svitlana L Zaruba Kostyantyn V Urbanevych Inna V Yakubovych Zinaida M popup.nrat_date 2021-01-29 Close