Wydanie 341(46)2 2018

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https://oa.zut.edu.pl/handle/20.500.12539/698

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Przeglądaj Wydanie 341(46)2 2018 wg Autor "Czerniawska-Piątkowska, Ewa"

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  • Miniatura
    PozycjaOpen Access
    Association of Polymorphism of Choosen Genes with Production Traits in Dairy Cattle
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2018) Czerniawska-Piątkowska, Ewa; Jadwiżak, Weronika; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin, Poland; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin, Poland
    Polymorphisms of DGAT1, ABCG2, SCD1 and PPARGC1A genes significantly affect the milk, fat and protein yield and chemical composition of milk. Depending on the type of polymorphism, they increase or decrease the milk, fat and protein yield as well as fat and protein content in milk. Based on the research carried out by numerous authors, it can be concluded that genotyping animals for polymorphism of selected genes and using this information in breeding programs for selection supported by markers, which will allow the development of populations with the most desirable production characteristics is right.
  • Miniatura
    PozycjaOpen Access
    Causes for Culling and Reproductive System Disorders in Jersey Cows in the Reproductive Period
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2018) Pytlewski, Jarosław; Antkowiak, Ireneusz R.; Stanisławski, Daniel; Czerniawska-Piątkowska, Ewa; Rolińska, Karolina; Department of Animal Breeding and Product Quality Assessment, Poznań University of Life Sciences, Poland; Department of Animal Breeding and Product Quality Assessment, Poznań University of Life Sciences, Poland; Computer Lab, Poznań University of Life Sciences, Poznań, Poland; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin, Poland; Department of Animal Breeding and Product Quality Assessment, Poznań University of Life Sciences, Poland
    The aim of this study was to analyse culling causes and determine reproductive health disorders in Jersey cows in the reproduction period in a herd from the Wielkopolska region. Analyses were conducted on 331 Jersey cows. The material for analyses was collected for the years 2010–2015 from the performance records of dairy cows, the AfiFarm herd management programme and veterinary inspection records. Source data concerned causes of cow culling and reproductive system disorders found in the reproduction period (i.e. from calving to successful fertilisation). Culling causes were divided based on the criterion applied by the Polish Federation of Cattle Breeders and Dairy Farmers. In this study the shares of culling causes were determined and the frequency of individual reproductive system disorders in the reproduction period were calculated in terms of the division into primiparous and multiparous cows. Sterility and reproductive system disorders were the most frequent culling causes in Jersey cows. In turn, endometritis was the most frequent reproductive disorder in cows of this breed in the reproduction period. No statistically significant relationship was found between the age group of cows (primiparous vs. multiparous) and the frequency of specific reproductive system disorders. The incidence rate of reproductive system disorders in Jersey cows in the reproduction period may most probably be reduced at a continuous improvement of environmental factors affecting these animals.