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The aim of this study was to examine whether and how different odorants placed on the bodies of female mice, but having no reward value for the males, affect courtship and mating behaviour of male mice towards females in oestrus and thus emitting female pheromones. In this manner, certain consequences of concurrent activation of the main olfactory system and the vomeronasal system were investigated...
Commercially available OptiXcell® extender was compared with conventional extenders for freezability and in vivo fertility of bull semen. Semen was collected from three Friesian bulls for five weeks (replicate) and qualifying ejaculates (motility >60%, concentration >0.5 billion/mL, volume >lmL) were diluted (37°C; 50 x 10⁶ spermatozoa/ml) with OptiXcell®, tris-citric egg yolk and egg yolk-citrate...
The effects of genetically modified (GM) soybean meal (SBM) and maize on the diversity and activity of microbiota inhabiting terminal gut segments in broiler chickens Were studied. Eight diets were prepared, based on conventional or GM SBM combined with maize cvs Clarica or PR39 F58, or their isogenic MON 810 counterparts cvs Bacilla or PR39 F56. Diets were fed from age 1 to 28 days to 144 Ross broilers,...
The objective of this study was to estimate genetic correlations of lactose percentage and urea concentration in milk with conformation traits related to udder and legs of Polish Holstein-Friesian cows. Data consisted of 5,813 test-day records and type scores of 791 primiparous cows. The analysis involved two descriptive traits (udder, feet and legs, scored from 50 to 100) and 11 linearly scored traits...
Next-generation sequencing (NGS), also known as high-throughput sequencing, is a novel method widely used in animal science and veterinary research. Introduction of NGS was a great breakthrough that has revolutionized the world of molecular biology techniques and animal genetics. An unquestionable advantage of NGS is connected with the almost unlimited insight into genetic information it provides...
The study aimed at determining fatty acid (FA) profiles of meat of seasonally fed slow-growing rabbits in relation to lipid composition of feeds and their intake. In each season, 21 weaned male rabbits (Popielno White breed) were assigned into two homogenous groups: the control (C, n=7) and seasonally fed - summer (S, n=14) or winter (W, n=14). Meat lipid, MUFA and PUFA contents were significantly...
Mammalian development is a process, whereby cells from a totipotent zygote gradually lose their potency, i.e. their ability to differentiate, in the environment of the developing embryo. An ideal model for testing the real potential of cells is the experimental production of chimaeras. The first experimentally produced mammalian (murine) chimaeras were created by Tarkowski [1961] and since then many...
As a goal of this paper, the assessment of genetic variability of Złotnicka White (ZW) and Zlotnicka Spotted (ZS), was chosen in order to verify the appropriateness of 11 tetrameric Short Tandem Repeats (STRs) panel for use in genetic resources of pigs. Analyses were carried out in sets of 91 ZW and 250 ZS pigs. Seventy-one alleles in ZW and 85 alleles in ZS were detected at all 11 STRs loci. An average...
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