Significant interbreed differences (between Simmentals and Black-and-White cattle) for 16 phenotypes of molar surface structure were detected in milk-cows. In Black-and-White cattle, 15 phenotypic variants of the head colour marks correlating with the body colour were found.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Investigation of corticosteroid levels in the hairs of female Holstein calves.
Anim Sci J
December 2024
Department of Life and Food Sciences, School of Agriculture and Animal Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan.
Article Synopsis
- - This study aimed to analyze the long-term effects of cortisol and aldosterone in the hair of six female Holstein calves using ELISA, across 18 calves over three seasons.
- - Results showed that cortisol levels were higher in the back region (white hair) compared to other regions and colors, and spring values were significantly higher than those in summer.
- - Additionally, aldosterone levels were found for the first time, with higher concentrations in the back region and white hair, showing seasonal variations with spring being higher than summer and winter.
Ultrastructure of the Bovine Testis in Cattle (): New View.
Animals (Basel)
June 2024
Electron Microscopy Centre, Faculty of Biology and Geology, Babeș-Bolyai University, 44 Republicii St., 400015 Cluj-Napoca, Romania.
The purpose of this study was to analyze the ultrastructure of the testes of sexually immature calves and reproductive bulls of the Polish Holstein-Friesian Black-and-White breed. Utilizing TEM, this study identified three distinct stages of seminiferous tubule development in calves, characterized by varying shapes, distributions, and arrangements of individual cells. In immature animals, early developing spermatocytes, prespermatogonia, and pre-Sertoli cells were observed within the seminiferous tubules.
View Article and Find Full Text PDFPelvic dimensions and occurrence of dystocia in Black-and-White and Holstein-Friesian heifers.
Pol J Vet Sci
December 2023
Department of Animal Reproduction with Clinic, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 2, 10-719 Olsztyn, Poland.
The Black-and-White (BW) breed, which until recently had dominated in Europe, was replaced by the Holstein-Friesian (HF) breed. As a result, the incidence of dystocia has increased. Dystocia occurs most frequently in heifers, and it is associated with high calf weight and/or too narrow pelvic openings in heifers.
View Article and Find Full Text PDFCryptosporidium infections in asymptomatic calves up to 4 months in Poland: a cross-sectional population study.
Sci Rep
November 2023
Department of Food and Environmental Virology, National Veterinary Research Institute, Al. Partyzantów 57, 24-100, Puławy, Poland.
Cattle cryptosporidiosis is noted worldwide with varied frequency of infection prevalence depending on geographical, environmental and husbandry factors. In this study, the prevalence of Cryptosporidium infections in cattle was determined on the basis of molecular results obtained by testing 1601 faecal samples collected from calves up to 4 months of age housed in all Polish provinces from 2014 to 2018. Detection and identification of Cryptosporidium species was performed at the 18 small subunit ribosomal RNA (18S rRNA) locus by conducting PCR-RFLP analysis of the amplified DNA fragments.
View Article and Find Full Text PDFGenetic Variability and Conservation Challenges in Lithuanian Dairy Cattle Populations.
Animals (Basel)
November 2023
Animal Science Institute, Lithuanian University of Health Sciences, R. Žebenkos 12, LT 82317 Baisogala, Lithuania.
The purpose of the study was to investigate the genetic variability of open Lithuanian Red and Red-and-White (LRWP) and Lithuanian Black-and-White (LBWP) dairy cattle populations and indicate the differences from the old genotypes of Lithuanian Black-and-White (LBW) and Lithuanian Red cattle (LR), which are currently under a conservation program. In order to gain a better understanding of the populations under conservation and to minimize the potential influence of other breeds, a distinct subgroup was formed that comprised animals whose father and mother belonged to the same breed (LR_pure and LBW_pure). The genetic variability was estimated using the number of founders, pedigree completeness, number of males and females in reproduction and age distribution, generation interval (GI), inbreeding coefficient (F) and effective population size (Ne).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!