Ivan Pavlík

Joint genealogical analysis as a tool for diversity evaluation in Pinzgau cattle populations

Abstract. The presented paper gives an overview about genetic diversity in Pinzgau populations in Austria and Slovakia. In total, 12 442 animals were included in the study representing the reference population. All living herdbook cows, dual purpose and beef, from both countries with a maximum foreign gene proportion of 12.5 % were considered. Thus, four subpopulations were analysed. Parameters of diversity based on probability of identity-by-descent and probability of gene origin were computed by the methods of pedigree analysis. The average inbreeding coefficient (five generations taken into account) was 0.0186 (ΔF=0.0041), 0.0242 (ΔF=0.0047), 0.0151 (ΔF=0.0026), and 0.0126 (ΔF=0.0006) in the Austrian dairy (AD), the Austrian beef (AB), the Slovak dairy (SD) and the Slovak beef (SB) subpopulation, respectively. Effective population size ranged from 122.5 (AD) to 809.4 (SB). Effective number of founders was 67.3 and 106.6 in AD and SD and 73 and 212.3 in the AB and SB subpopulations. Effective number of ancestors was 29.59; 34.42; 42.36 and 73.81 in AD, AB, SD and SB, respectively. Effective number of founder genomes was 15.32; 18.15; 23.41 and 41 in AD, AB, SD and SB subpopulations, respectively. Similarities between subpopulations were calculated based on a cosine approach. The highest similarity was found between AD and AB (cosine value 0.9954). SD and AD subpopulations were very similar (cosine value 0.9181).

The influence of the genomic data on the showjumping horses performance evaluation.

The aim of this study was to find out the influence of the genomic data on the showjumping horses performance evaluation for the purpose of genetic evaluation and subsequent estimation of breeding values of sport horses in Slovakia. For the evaluation of showjumping performance data of Global Champions Tour (season 2012) was used. The 4,729 individual competitions were recorded. The fourteen SNPs (single nucleotide polymorphisms) linked with showjumping performance were used for the simulation analyse. To explain the variability of horses ranking we used some different models. In the first model without SNP effect we are able to describe 53 % of performance (coefficient of determination R2 was 0.53). In linear model with some effects in form of quadratic regression we obtained R2 0.60. Highest R2 0.61 we obtained in the third model where one SNP effect was taken into account. Coefficient of determination R2 = 0.63 we obtained in the model where we used fourteen simulated SNP effects. It is possible to use simulated SNP data for evaluation of performance of showjumping horses. We observed increase of R2 in dependence on number of involved SNPs in the model. In case of fourteen simulated SNP effects used in the linear model, increase of R2 was 0.03 compared to the model without SNP effect.

Important genealogical bloodlines of Pinzgau cattle in Slovakia

The aim of this paper was to analyze sire bloodlines within the Slovak Pinzgau cattle population. There were 13 genealogical bloodlines found together. The most widespread bloodline was Apollo. The average estimated breeding values according to sire bloodlines were predominately negative. The best milk production EBV were found in Benito line (-39.35 kg). The best growth ability according to EBV for weaning weight (210 days) was found in Karst bloodline (+3.39 kg). Significant influence of genealogical bloodline was found on EBV for weight in 365 days, protein production and weaning weight (210 days).

Inheritance of coat colour in Slovak Pinzgau cattle

The objective of the work was analysis of chestnut coat colour inheritance of Slovak Pinzgau cattle in accordance to age and farming system. In 304 cows of breeding groups P0,P1,P2 and R3 born between 2000 to 2010 from four breeding herds (4 agricultural cooperatives and JSC: PD Smrecany – farm Veterna Poruba, PD Spisske Bystre – farm Kvetnica, Agria Liptovský Ondrej JSC – farm Liptovska Porubka, PD LCV Cimhova) was measured intensity of coat colour. For objective measurement of coat colour the handheld Minolta Chromameter CM-2600d was applied using the CIE L*a*b* colour space. The instrument recorded the values L*, a* and b*. The L* value shows the lightness of the colour, a* value indicates the red/green, while the b* value indicates the yellow/blue chromaticity of the colour. The values C* (Chroma/saturation) and h (hue) were derived from the values a* and b*. Average lightness in observed animals was 22.60; average of the red chroma was 8.84 resp. 13.32 for the yellow chroma. Saturation of coat colour was 16.19 resp. 0.97 for hue.