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Information × Registration Number 0225U004929, (0123U105300) , R & D reports Title To investigate the influence of genotypic and paratypic factors on the formation of productive longevity of Simmental cows in the foothills of the Carpathian region popup.stage_title Дослідити вплив генотипових і паратипових факторів на формування продуктивного довголіття корів симентальської породи в умовах передгірної зони Карпатського регіону Head Dankiv Victoriia Ya., Кандидат сільськогосподарських наук Registration Date 23-12-2025 Organization Institute of Agriculture of the Carpathian Region of the National Academy of Agrarian Sciences of Ukraine popup.description1 To investigate the nature of the relationship between the productive longevity of Simmental cows and their origin, exterior and constitutional features, the influence of seasonal and age factors and, on this basis, to develop methodological recommendations for the creation of highly productive herds of the combined direction of productivity in the conditions of the Carpathian region popup.description2 Object of research: Productive traits of Simmental cows under different breeding methods, and the duration of economic use of cows of various genotypes. Purpose of research: To investigate the nature of the relationship between the productive longevity of Simmental cows and their origin, exterior-constitutional characteristics, the influence of seasonal and age-related factors, and to develop methodological recommendations for creating highly productive herds of dual-purpose cattle in the Carpathian region. Research methods: Generally accepted zootechnical, statistical (including the processing of research results and determination of their reliability), and economic methods. It was established that under the conditions of the foothill zone of the Carpathian region, crossbred cows (Holstein × Simmental) were characterised by higher precocity (age at first mating 18.9 months compared to 24.2 and 27.5 months in purebred Simmentals), higher milk yields during the first and second lactations by 11–38%, but significantly shorter duration of economic use (2.7 lactations compared to 4.6 and 5.4 lactations in purebred Simmentals) and 20–41% lower lifetime milk yield. It was found that the age of first successful insemination has a negative correlation with milk yield during the first lactation. At the same time, a specific positive relationship exists between milk yield in the first lactation and the length of the service period after the first calving (correlation coefficients ranging from 0.299 to 0.491). Between milk yield in the first lactation and lifetime milk yield, a low negative correlation was observed (r = –0.132 to –0.305), indicating that more productive first-calf cows were likely characterised by shorter duration of economic use. Product Description popup.authors Bratyuk Vacyl' M Myron A. Petryshyn Natalia N. Fedak popup.nrat_date 2025-12-23 Close