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Information × Registration Number 0221U101770, 0120U101094 , R & D reports Title To investigate the effect of crossbreeding the rams of the meat direction productivity Dorper breed with the ewes of domestic selection breeds on reproductive signs the hybrid ewes popup.stage_title Head Masliuk Andrii Mykolaiovych, Кандидат сільськогосподарських наук Registration Date 25-01-2021 Organization M.F.Ivanov Institute for Animal Breeding in Steppe Regions "Ascania-Nova" popup.description2  The aim of the work is to investigate the reproductive characteristics of crossbred ewes obtained from the crossing of the meat productivity direction Dorper rams with the domestic breeds ewes. The object of the research is the crossbred ewes' formation reproductive qualities. Research methods - zootechnical, genetic-population, laboratory, biometric statistics using computer and software. In 2020, all mated experimental crossbred ewes and lamb ewes had lambing. The average fertility of ewes was 130%. The yield of lambs per 100 ewes obtained from the crossing with the Dorper and Ascanian Meat-and-Wool breeds rams was 133%, and 110% of the Dorper x Ascanian Fine-Fleeced genotype. The abundance of fertility was 110%, of ewes with the second lambing and over 140%. Singles at birth weighed an average of 5.9 kg, twins 4.4 kg. Lambs with a live weight of 5.6 kg were 0.9 kg more than lamb. The live weight of lambs obtained from crossing rams of the Dorper breed and the Ascanian Meat-and-Wool was 5.2 kg (singles 6 kg, twins - 4.4 kg), and of the genotype Dorper x Ascanian Fine-Fleeced - 5.4 kg (singles 6 kg, twins - 3.9 kg). Due to the high maternal qualities of crossbred ewes, the survival rate of the offspring was 92%. In different age periods of lambs' growth on suckling, this indicator was uneven. The highest body weight gain was observed in the first month of lambs' life. So in 30 days age their average live weight was 15.7 and the average daily gain at the level of 350 g. In 70 days, age the live weight of lambs was 23.6 kg. The average daily gain was at the level of 260 g. When weaned from mothers at 130 days age, the live weight of lambs was 34.1 kg, the average daily gain for the entire period of suckling was 218 g. The effectiveness of using crossbred ewes obtained from Dorper rams was established. Product Description popup.authors Atanovska-Masliuk Oleksandra Yo Zinevych Vitalii M popup.nrat_date 2021-01-25 Close