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Effect of selected factors on the body condition of dairy cows managed in the free-stall and tie-stall housing systems

100%

Sablik P., Janus E., Szewczuk M., Vovk S., Padzik N.

Acta Scientiarum Polonorum. Zootechnica

|

2019

|

tom 18

|

nr 1

2

DNA sequence features underlying copy number variants

88%

Barski P., Mielczarek M., Fraszczak M., Szyda J.

Acta Scientiarum Polonorum. Zootechnica

|

2019

|

tom 18

|

nr 2

3

Factors affecting the freezing point of milk from Polish Holstein-Friesian cows

88%

Otwinowska-Mindur A., Ptak E., Grzesiak A.

Annals of Animal Science

|

2017

|

tom 17

|

nr 3

4

The influence of selected factors on the yield and quality of colostrum produced by Polish Holstein-Friesian cows

75%

Gulinski P., Gago V.

Acta Scientiarum Polonorum. Zootechnica

|

2019

|

tom 18

|

nr 1

5

Comparison of calving course of Limousine purebreds and their crossbreeds with Polish Holstein-Friesian cows

75%

Przysucha T., Slosarz J., Golebiewski M., Kunowska-Slosarz M.

Annals of Warsaw University of Life Sciences - SGGW. Animal Science

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2013

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tom 52

Calving course of 100 cows of Limousine breed covered by bulls of the same breed as well as 100 cows of Polish Holstein-Friesian breed inseminated with Limousine bull's semen was investigated. In purebred population the material was taken from the beef cattle recording scheme provided by the Polish Association of Beef Cattle Breeders and Producers. In case of commercial crossing the material was taken from the questionnaires collected by the technicians representing Mazovian Centre of Animal Breeding and Reproduction in Łowicz. The data base covered calving course degree and calf body weight at birth degree. It was proved, that the significantly higher ratio of deliveries when human help was needed was stated in the purebred Limousine population (14%), in comparison to crossbreeding where the above mentioned ratio was only 7%. The most difficult calvings were observed for the calves of the highest birth weight. The high ratio of assisted calvings in commercial crossing as well as in purebred population of Limousines suggest that all of the deliveries should be monitored by the breeders. It should be also stated that the ratio of difficult calvings in the commercial crossing is significantly lower than that observed in purebred PHF population. Because of so low ratio of assisted calvings in commercial crossing with Limousine bulls it should be recommended to use the semen of bulls which pedigree show high body weight at birth and muscularity.

6

Effect of calving season on the course of parturition and rearing results of Polish Holstein-Friesian calves

75%

Szewczuk M., Bogacka A., Czerniawska-Piatkowska E.

Acta Scientiarum Polonorum. Zootechnica

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2011

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tom 10

|

nr 2

The aim of the study was the analysis of the effect of calving season on the course of parturition and rearing results of Polish Holstein-Friesian calves of Black-and-White strain from birth to 3 months of age. Easy calvings (1;2) predominated on the farm. In spring, they accounted for 91.2% of all calvings occurring in this season. The respective values for summer, winter and autumn were 89.7%, 88.6% and 87.6%. The highest mean birth weight was characteristic of calves born in winter (40.8 kg and 44.2 kg for heifer calves and bull calves, respectively). The highest mean daily body weight gains in the whole rearing period were achieved by heifer calves born in winter (704 g) and bull calves born in spring (750 g). In the group of heifer calves and bull calves, statistically significant differences during the analysed rearing period were found (P≤0.01, P≤0.05). The highest percentage of ill calves was found in the autumn-winter season and the lowest one in spring and summer.

7

An association between the C>T single nucleotide polymorphism within intron IV of osteopontin encoding gene (SPP1) and body weight of growing Polish Holstein-Friesian cattle

75%

Pareek C. S., Czarnik U., Pierzchala M., Zwierzchowski L.

Animal Science Papers and Reports

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2008

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tom 26

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nr 4

A relation was studied between body weight measured at the age of 3, 6 and 12 months in Polish Holstein-Friesian (HF) heifers (n=111) and young bulls (n=87) and C/T polymorphism within intron IV of bovine osteopontin encoding gene (SPP1). Three half-sib (HS) families were considered, each sired by heterozygous C/T sire. Significant association was found of SPP1 C>T SNP with body Wright in all the analysed HS progeny groups of young heifers and bulls. Within young bulls the differences were identified (P≤0.05) in body weight between the SPP1 genotypes (8514C/C, 8514C/T, 8514T/T) in month 3, 6 and 12 of age. Within heifers, however, the differences (P≤0.05) were found in the progeny groups aged 6 and 12 months. Moreover, when data from bulls and heifers were pooled (n=198) the highly significant effect (P≤0.01) of SPP1 genotype on body weight was observed at the age of 6 and 12 months.

8

Claw diseases and lameness in Polish Holstein-Friesian dairy cows

75%

Olechnowicz J., Jaskowski J. M., Antosik P., Bukowska D., Urbaniak K.

Bulletin of the Veterinary Institute in Puławy

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2010

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tom 54

|

nr 1

93-99

The objective of this study was to estimate the influence of age (parity) and housing system on the incidence of claw lesions and lameness in Polish Holstein-Friesian dairy cows. The incidence of hoof lesions and lameness in 1,330 cows was determined at claw trimming at 11 dairy farms in 2003-2004. In the front limbs, the mean of healthy claws was 86.6%, while in the hind limbs, it was 38.7%. The percentage of main diseases in the total number of observed claw lesions was 32.1% for sole ulcers, 18.4% for sole haemorrhage, 17.8% for digital dermatitis, 9.4% for white line disease, 8.1% for thick hock, and 4.5% for interdigital dermatitis. Primarily, the sole ulcers were associated with sole haemorrhage, white line disease, interdigital growth, interdigital dermatitis, and thick hock. The incidence of lameness was noted in 31.4% (locomotion score 2) and 11.7% (locomotion score 3). Parity and housing systems (tethered and free stalls) had no effect on the total percentage of healthy claws and the distribution of the locomotion score. The incidence of sole ulcers was 47.6% and 55.4% of the total numbers of claw lesions in cows with locomotion scores 2 and 3 respectively.

9

Report on the incidence of hereditary disorders (BLAD, DUMPS) in the Polish population of Holstein-Friesian cattle

75%

Gozdek M., Kolenda M., Kamola D., Sitkowska B.

Acta Scientiarum Polonorum. Zootechnica

|

2020

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tom 19

|

nr 3

10

Analysis of fattening results of Polish Holstein-Friesian bulls and PHF x Belgian Blue crossbreds bulls

75%

Przysucha T., Stefaniuk M., Golebiewski M., Slosarz J., Wnek K., Kunowska-Slosarz M.

Annals of Warsaw University of Life Sciences - SGGW. Animal Science

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2014

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tom 53

The aim of study was the comparison of fattening results of Polish Holstein- Friesian (PHF) and PHF × Belgian Blue crossbreds (PHF × BB) bulls fattened in intensive system up to age of 18 months. Fattening results of 50 bulls in each genotype group were analyzed. Bulls were kept in freestall system at seven private farms located in Central Poland and up to about 60 days of life fed with milk replacement, hay and concentrates and since that maize-silage, hay-silage and concentrates were introduced to their diet. Animals were weighted on digital scale every 3 months. After slaughter the dressing percentage and the carcasses evaluation by EUROP method were collected from processing plant. Standardized averages of bulls body weight at 120th, 210th and 540th day of life were calculated as well as the average daily body gains in particular fattening periods. Results reviled that crossbreds PHF × BB were heavier by 94.2 kg (11.61%) then purebreds PHF at age of 18 months. The average daily body gains were high and accounted 1081 g for PHF and 1183 g for PHF × BB bulls, respectively. Daily body gains of crossbreds were higher by 10.94%. Observed dressing percentage was high for the both genotype groups but by 3.4 percentage points higher for crossbreds which also obtained the better notes in EUROP carcasses evaluation.

11

Assessment of ANXA9 SNP effects on milk performance traits in Polish Holstein-Friesian cows

75%

Kulig H., Wojdak-Maksymiec K., Szewczuk M.

Acta Scientiarum Polonorum. Zootechnica

|

2019

|

tom 18

|

nr 4

12

Effect of polymorphism in IGF-1 gene on production traits in Polish Holstein-Friesian cattle

75%

Siadkowska E., Zwierzchowski L., Oprzadek J., Strzalkowska N., Bagnicka E., Krzyzewski J.

Animal Science Papers and Reports

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2006

|

tom 24

|

nr 3

13

Differences in the assessment of beef carcasses in EUROP system

63%

Wnek K., Golebiewski M., Przysucha T., Wozniak A., Wierzbicki J.

Annals of Warsaw University of Life Sciences - SGGW. Animal Science

|

2015

|

tom 54[1]

Classification of slaughter animals in EUROP system is obligatory for all EU countries. Visual assessment of beef carcasses determines the level of muscle and fat in scales from E to P and from 1 to 5. At the same time beef carcass is classified into one of five categories of cattle for slaughter from A to E. Visual assessment is not fully objective and is fraught with classifier error, which has an impact on the final assessment of the carcass. 2689 beef carcasses were classified in different categories for slaughter. Assessments were performed by three classifiers independently and in the same conditions in the slaughter line. Based on the results of evaluations of beef carcasses were performed statistical analysis. The average value for the conformation was class O, which accounted for 52.66% of all beef carcasses and at a comparable level fat class 2 and 3 – 39.54%, 32.54% respectively, which is characterized by a low content of meat and average fat content in carcase. CV (coefficient of variation) for the SE (standard deviation) in the conformation class was around 3% for the three categories slaughter A, B and E, and D was 2.16%. For the fat class regardless of the category slaughter CV for the SE was 3 times larger. The results suggest that visual assessment of beef carcasses is not objective and is fraught with error evaluator.

14

Genetic relationship of conformation traits with lactose percentage and urea concentration in milk of Polish Holstein‑Friesian cows

63%

Satola A., Ptak E., Jagusiak W., Otwinowska-Mindur A.

Animal Science Papers and Reports

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2017

|

tom 35

|

nr 3

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 (describing udder: fore udder height, rear udder height, central ligament, udder depth, udder width, fore teat placement, teat length, rear teat placement; describing legs: rear legs - side view, foot angle, rear legs - rear view; on a scale of 1 to 9). Genetic correlations were calculated based on (co)variances estimated using the Bayesian method via Gibbs sampling and the multitrait animal model. Genetic correlations between lactose content and conformation traits ranged from -0.18 to 0.23, while those between milk urea concentration and conformation traits ranged between -0.02 and 0.43, respectively. Absolute values of average genetic correlations with daily lactose percentage exceeded 0.15 only for udder (descriptive trait) and several linearly scored traits, i.e. central ligament, udder depth, rear teat placement, and rear legs - rear view. Milk urea content was weakly or moderately genetically correlated with six type traits: udder, and five linearly scored traits: fore udder height, central ligament, udder width, teat length, and rear legs - side view. Absolute values of genetic correlations between these traits exceeded 0.15. Our results showed that type traits connected with udder were more highly genetically correlated with both lactose and milk urea contents than type traits describing legs. It meant that an increase in both lactose percentage and urea concentration in milk might be expected as an indirect response to selection for better udder, whereas selection for improvement of legs would not affect lactose percentage and milk urea content.

15

Impact of LEP and LEPR gene polymorphisms on functional traits in Polish Holstein-Friesian cattle

63%

Komisarek J.

Animal Science Papers and Reports

|

2010

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tom 28

|

nr 2

Five single nucleotide polymorphisms in leptin and leptin receptor genes were analysed for their possible impact on estimating breeding values for somatic cell count score (SCS) in milk, longevity and reproductive traits. Used were 309 active Polish Holstein-Friesian bulls. The LEP-C(-963)T,LEP-Y7F, LEP-R25C, LEP-A80V, and LEPR-T945M genotypes were identified using the PCRRFLP method. For linked leptin mutations, the additional haplotype analysis was performed. The results obtained suggest that three polymorphisms of bovine LEP gene may be associated with nonreturn rate in cows. The most significant effect was found for LEP-A80V. Moreover, the LEPRT945M mutation seemed to be related to the age at first insemination.

16

A comparison of somatic cell counts and urea levels in milk of Jersey and Polish Holstein-Friesian Black-and-White cows kept under identical environmental conditions

63%

Antkowiak I., Pytlewski J.

Animal Science. Scientific Papers of Agricultural University of Poznan

|

2006

|

tom 08

17

Prevalence of selected metabolic diseases in dairy herds in Eastern Poland

63%

Gulinski P.

Acta Scientiarum Polonorum. Zootechnica

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2019

|

tom 18

|

nr 2

18

SLC27A1 SNPs in relation to breeding value of milk production traits in Polish Holstein-Friesian cows

63%

Kulig H., Kowalewska-Luczak I., Zukowski K., Kunicka M., Kruszynski W.

Animal Science Papers and Reports

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2013

|

tom 31

|

nr 4

The aim of the study was to investigate associations between SLC27A1 genotypes and estimated breeding value of milk production traits (milk, fat and protein yield, kg; fat and protein content, %) in the Polish Holstein-Friesian cows’ herd. Three single nucleotide polymorphisms were genotyped,the g.14996C>G. in the exon 3, g.14791C>T in exon 4 and g.14589A>G in exon 5 of SLC27A1 gene.The genotype and allele frequencies for each polymorphism and the SLC27A1 haplotype frequencies were estimated in the examined herd. Significant relations between the SLC27A1 g.14791C>T SNP and breeding value for protein content were found. The results indicate that selection for the SLC27A1-CC individuals might contribute to increased protein content of milk in Polish Holstein-Friesian cows. Further studies are needed to confirm these results.

19

Dissecting an interplay between genomic and pedigree sources of information to estimate breeding values for milk yield in Polish Holstein-Friesian dairy cattle in a one-step approach based on a random regression test day model

63%

Suchocki T., Liu Z., Zarnecki A., Szyda J.

Animal Science Papers and Reports

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2017

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tom 35

|

nr 2

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 implementation of a one-step approach in a random regression test day model context for the Polish Holstein Friesian population, considering various ways of adjusting the relationship matrix. Data consisted of 890 animals (10 genotyped bulls, 100 cows with phenotypic data and 780 ancestors without genotypes or phenotypes). Random regression test day models with a polygenic effect on milk yield modeled by second order Legendre polynomials for the estimation of variance-covariance parameters and were used for prediction of genomically enhanced breeding values (GEBV). In this model, a matrix combining pedigree and marker-based information was used instead of a traditional numerator relationship matrix. In this matrix the proportions of information coming from pedigree and markers were defined by weighting parameters w and 1-w for pedigree and marker-based information matrices, respectively. Various weights of the two sources of information were considered. The accuracy of GEBV both for genotyped bulls and for cows with phenotypes was highest for weighting parameter w=0 and lowest for w=l. Incorporating genomic information into a conventional genetic evaluation improves reliabilities of breeding value prediction, however, pedigree information is important to maintain the stability of evaluation for non-genotyped animals. Implementation of the single-step approach in a random regression test day model framework is very attractive for genomic prediction in dairy cattle, since it allows to incorporate genomic information directly into a conventional genetic evaluation. However, for accurate predictions it is essential to achieve the right balance between the numerator relationship and markers-based relationship information.

20

Lactation extension with regard to milk, fat and protein yield in Polish Holstein-Friesian cows of Black-and-White variety

63%

Janus E., Borkowska D.

Acta Scientiarum Polonorum. Zootechnica

|

2011

|

tom 10

|

nr 1

In the paper the influence of daily milk yield in peak lactation, milk yield during 305 days after calving and number of cows’ calving on frequency of lactations longer than 305-day standard were analyzed. It was also estimated the influence of extended lactation on milk yield and milk composition. The research were carried out in a herd including 220 Polish Holstein-Friesian cows of Black-And-White variety. The animals were housed in a loose barn and were fed a balanced TMR. The research included 384 lactations, which were longer at least 1 day than 305-day standard, and were selected out from 488 complete lactations. It was found that frequency of extended lactations was 78.7%, and moreover the most frequently (25.0%) the period of extension lasted up to 30 days. During extension period milk production was higher by 2.5–43.0% in compare to milk yield in standard lactation. Lactation extending was slightly connected with milk yield per 1 day of complete lactation. Values of this trait were highest in the case of lactation extended maximally by 60 days.

Ograniczanie wyników

Effect of selected factors on the body condition of dairy cows managed in the free-stall and tie-stall housing systems

DNA sequence features underlying copy number variants

Factors affecting the freezing point of milk from Polish Holstein-Friesian cows

The influence of selected factors on the yield and quality of colostrum produced by Polish Holstein-Friesian cows

Comparison of calving course of Limousine purebreds and their crossbreeds with Polish Holstein-Friesian cows

Effect of calving season on the course of parturition and rearing results of Polish Holstein-Friesian calves

An association between the C>T single nucleotide polymorphism within intron IV of osteopontin encoding gene (SPP1) and body weight of growing Polish Holstein-Friesian cattle

Claw diseases and lameness in Polish Holstein-Friesian dairy cows

Report on the incidence of hereditary disorders (BLAD, DUMPS) in the Polish population of Holstein-Friesian cattle

Analysis of fattening results of Polish Holstein-Friesian bulls and PHF x Belgian Blue crossbreds bulls

Assessment of ANXA9 SNP effects on milk performance traits in Polish Holstein-Friesian cows

Effect of polymorphism in IGF-1 gene on production traits in Polish Holstein-Friesian cattle

Differences in the assessment of beef carcasses in EUROP system

Genetic relationship of conformation traits with lactose percentage and urea concentration in milk of Polish Holstein‑Friesian cows

Impact of LEP and LEPR gene polymorphisms on functional traits in Polish Holstein-Friesian cattle

A comparison of somatic cell counts and urea levels in milk of Jersey and Polish Holstein-Friesian Black-and-White cows kept under identical environmental conditions

Prevalence of selected metabolic diseases in dairy herds in Eastern Poland

SLC27A1 SNPs in relation to breeding value of milk production traits in Polish Holstein-Friesian cows

Dissecting an interplay between genomic and pedigree sources of information to estimate breeding values for milk yield in Polish Holstein-Friesian dairy cattle in a one-step approach based on a random regression test day model

Lactation extension with regard to milk, fat and protein yield in Polish Holstein-Friesian cows of Black-and-White variety