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The increasing attention paid by both the legislature and consumers concerning animal welfare has raised criticism regarding the tie stall housing system of dairy cattle, since it restricts voluntary movement and limits the social behaviour of cows. The aim of this study was to compare the welfare of dairy cows kept in a tie-stall (TS) and an open-stall (OS) system by assessing metabolic, immunological...
In the future an approach incorporating cows’ measured phenotypes and marker genotypes of cows and bulls within a single model can be applied. The most important advantage of such a model is the simultaneous use of pedigree and marker-based genomic relationship data. Such a solution allows the use of both genotyped and non-genotyped animals in the prediction procedure. This pilot study is aimed towards...
The objective of the study was to identify an association between the genotypes of BoLA-DRB3.2 loci (*16/- and *23/-) and occurrence of sub-clinical mastitis or latent mammary gland infections caused by different bacterial species in dairy cows. Blood was withdrawn from of 275 cows from two Polish dairy herds, and animals were genotyped for BoLA-DRB3.2*16 and BoLA-DRB3.2*23 using MPTPCR technique...
The aim of the study was to analyse the relationship between three leptin gene polymorphisms, and indices of reproductive performance – age at first calving, days open, calving interval, number of inseminations per conception, and gestation length in Jersey cattle. A total of 219 cows were tested for the R4C, A59V and C(-963)T mutations using the PCR-RFLP technique. The following allele frequencies...
Czech Pied dairy cows were observed one day each month for the period of 12 months (12 test days). All the cows were in the first phase of lactation, i.e. up to 100 days after calving. The mean number of lactation was 2.8, the cows were on average 54.8 days after calving and the mean concentration of cholesterol in blood plasma was 3.93 mmolˇdm-3 (149.4 mgˇ10-1dm-3). During the first 100 days of lactation...
In the experiment involved 186 milk samples obtained from cow udder quarters at different state of mastitis. Milk derived from infected udder quarters was characterised by a statistically significant higher total protein percentage share and a higher pH value (p£ 0.05) by a lower lactose (p£ 0.01) and casein content (p£ 0.05) than milk of healthy quarters. The content of solids not fat indicated the...
Udders and teats conformation changes that undergo in subsequent lactations were analysed with regard to mastitis. The studies included 97 Black-and-White and Red-and-White cows managed in a herd of an average annual yield of 10,000 kg of milk, in one of the leading specialist farms located in south-west Poland. First lactation cows are characterised by relatively low somatic cell counts in milk,...
Because of the antimicrobial role that defensins play in humans and animals, genes encoding these peptides may be considered as molecular markers of a genetically determined susceptibility (or resistance) of the mammary gland to mastitis. Records were gathered of daily milk yield, fat, protein, and lactose content of milk, and milk somatic cell count (SCC) of 217 lactating Black-and-White cows. To...
Data on insemination and reinsemination were collected from 1 643 Black and White (BW) cows with varied share of HolsteinFriesian (HF) genes, which belonged to the active population managed in five largescale production farms in the KujawskoPomorskie Province, Poland. A total number of 351 repeated inseminations were recorded, which amounted to 7.71% of all inseminations. The rates of nonreturn...
The analysis was carried out on 67 primiparous cows of different colour sired by blackwhite redfactor (RF) bulls, kept in a modern dairy farm in southwest Poland. The aim of this study was to confirm or reject the hypothesis that the daughters with different colours obtained from redwhite mothers and blackwhite RF bulls may also differ in their milk yield during the first 305day lactation corrected...
The paper presents the basic outside and inside pelvic diameters of 136 Holstein-Friesian cows, and the coefficients of phenotypic correlation between these measurements and the course of parturition.
The fatty acid composition of milk from Lowland Black-and-White and Polish Red cows was determined for the period of pasture feeding. The total fatty acid profile was determined by gas chromatography with a 50 m long polar capillary CP Sil 88 column. The content of trans C18:1 acid was determined with the same column after separating first the fraction of trans monoenoic methyl esters by silver-ion...
The aim of this study was to evaluate milk hygienic quality and to determine a relationship between season of year and raw milk quality indices. The experiment was carried out on 38 samples of milk collected from 80 highproduction cows managed in a leading cattle breeding centre in southwest Poland. The analysis comprised total bacteria count, somatic cell count in 1 cm3 of milk, chemical composition...
The studies were carried out on the population of 14215 cows. The first lactation yield, in kg of FCM, significantly differentiated both the yields of subsequent lactations and the indices of life performance of the cows. In highproduction herds (with more than 5000 kg FCM), it is justifiable that the requirement should be met for heifer cows to reach the yield that would balance the costs of their...
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