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Information × Registration Number 0221U102250, 0119U002098 , R & D reports Title To investigate the heterosis effect of crossing the ewes of Ascanian Karakul breed with the rams-sires of the foreign breeding meat breeds popup.stage_title Head Kudryk Neonila A., 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 productivity level and the heterosis effect of crossing the Ascanian Karakul breed ewes with the foreign selection meat breeds ram-sires was investigated and it in order to increase the production of lamb meat and young mutton. Purebred and crossbred genotypes obtained by crossing the Ascanian Karakul breed ewes with Dorper and Texel rams for creation the specialized meat breeds, were assessed by the smushki qualities, reproduction rates, intensity of growth, development and meat productivity. When crossing the Ascanian Karakul breed ewes with ram-sires of the Dorper breed, the largest share both among purebred and among crossbred lambs were of the ribbed smushkiі type - 61.0 and 61.6%. Average daily gain in live weight from birth to 4 months of age in purebred animals - 185.9-196.6 g; crossbred - 208.3-228.0 g; pre-slaughter live weight of sheep at 6 months of age, respectively, 33.7 and 33.5 kg, slaughter yield - 40.9 and 43.2%. The effect of heterosis between purebred and crossbred lambs was established at the level of 1.3-57.4 in terms of live weight and meat productivity. When crossing the Ascanian Karakul breed ewes with ram-sires of the Texel breed, the yield of the ribbed smushki type was 62.0% versus 53.1% in purebreds. Average daily gain in live weight during the suckling period in purebred animals - 194.9 g; crossbreds - 234.5 g; the pre-slaughter live weight of rams at 5 months of age, respectively, was 33.8 and 34.2 kg; slaughter yield - 49.9 and 47.0%. A low effect of heterosis between purebred and crossbred lambs was established - 2.0-20.5. Crossbred genotypes have been created. Recommendations for the use of crossing in Karakul sheep breeding have been developed. Product Description popup.authors Kudryk Neonila А Mohylnytska Svitlana V popup.nrat_date 2021-01-29 Close