FPUTS seria Agricultura, Alimentaria, Piscaria et Zootechnica, 2022

Stały URI zbioru

https://oa.zut.edu.pl/handle/20.500.12539/762

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Przeglądaj FPUTS seria Agricultura, Alimentaria, Piscaria et Zootechnica, 2022 wg Temat "bydło mleczne"

Teraz wyświetlane 1 - 2 z 2
  • Miniatura
    PozycjaOpen Access
    Analysis of Polymorphism in the NUCB2 Gene and the Milk Production Traits of Polish Holstein-Friesian Cattle
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2022) Szalast, Daria K.; Kowalewska, Inga; Czerniawska-Piątkowska, Ewa; Department of Genetics, West Pomeranian University of Technology, Szczecin, Poland; Department of Genetics, West Pomeranian University of Technology, Szczecin, Poland; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin, Poland
    The aim of the study was to analyze the single nucleotide substitution polymorphism (SNP) located in exon 9 (1079 G>T, rs471862956) of the gene encoding nucleobindin-2 (NUCB2) in relation to milk production traits such as milk, protein and fat yield and protein and fat content in milk. The research was carried out in a herd of Polish Holstein-Friesian black and white cattle, and genotyping of individual animals was carried out using PCR-RFLP. The most common genotype is the heterozygous genotype (0.53), and the more frequent allele is the T allele (0.52). The analysis of the obtained results showed that there are statistically significant relationships at the level of P ≤ 0.05 and P ≤ 0.01 between individual genotypes of the polymorphism studied and the considered milk performance characteristics. It was observed that individuals with the TT homozygous genotype were characterized by the highest values of such traits as: milk yield as well as fat and protein yield. However, in the case of animals of the homozygous GG genotype, it was observed that the milk obtained from them was characterized by the highest fat and protein content.
  • Miniatura
    PozycjaOpen Access
    Initial Observations on Preventive Measures in Herds of Dairy Cows of Conserved and Highly Productive Breeds
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2022) Kępka, Katarzyna; Wójcik, Ewa; Institute of Animal Science and Fisheries, Faculty of Agrobioengineering and Animal Husbandry, Siedlce University of Natural Sciences and Humanities, Siedlce, Poland; Institute of Animal Science and Fisheries, Faculty of Agrobioengineering and Animal Husbandry, Siedlce University of Natural Sciences and Humanities, Siedlce, Poland
    Cattle of conserved breeds are more resistant, healthier, and more adaptable to unfavour- able environmental conditions, with less rigid feed requirements. In contrast, cattle of highly productive breeds are more sensitive to deviations in environmental conditions and therefore are assumed to require a wider range of preventive actions. The aim of the study was to present the differences and similarities in the use of preventive measures in herds of cattle of conserved and high-yielding breeds. The data for the study were collected by means of an Internet survey. A total of 150 responses from dairy cattle farmers were obtained, from four producer groups. Statistical analysis of the results was performed by the chi-squared test. It was concluded from the responses that farmers raising high-yielding breeds more often make use of prophylactic tools such as regular veterinary and zootechnical checks, microclimate measurements, TMR and PMR feeding systems, balancing of feed rations, feed quality testing (especially haylage and maize silage), and use value assessment. However, high-yielding cows had access to pasture much less often than cattle of breeds included in a genetic resources conservation programme. Breeding progress is important in the development of a breeding farm, and therefore farmers should be aware of the value of genetic and cytogenetic testing as additional tools broadening the range of preventive measures that could improve the genetic pool in the dairy cattle population in Poland.