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Czech University of Life Science Prague, Kamycka 129, Prague
This study focused on the genomic differences between the Czechoslovakian wolfdog (CWD) and its ancestors, the Grey wolf (GW) and German Shepherd dog. The Saarloos wolfdog and Belgian Shepherd dog were also included to study the level of GW genetics retained in the genome of domesticated breeds. The dataset consisted of 131 animals and 143,593 single nucleotide polymorphisms (SNPs). The effects of demographic history on the overall genome structure were determined by screening the distribution of the homozygous segments. The genetic variance distributed within and between groups was quantified by genetic distances, the FST index, and discriminant analysis of principal components. Fine-scale population stratification due to specific morphological and behavioural traits was assessed by principal component and factorial analyses. In the CWD, a demographic history effect was manifested mainly in a high genome-wide proportion of short homozygous segments corresponding to a historical load of inbreeding derived from founders. The observed proportion of long homozygous segments indicated that the inbreeding events shaped the CWD genome relatively recently compared to other groups. Even if there was a significant increase in genetic similarity among wolf-like breeds, they were genetically separated from each other. Moreover, this study showed that the CWD genome carries private alleles that are not found in either wolves or other dog breeds analysed in this study.
Nina Moravčíková; Radovan Kasarda; Radoslav Židek; Luboš Vostrý; Hana Vostrá-Vydrová; Jakub Vašek; Daniela Čílová. Czechoslovakian Wolfdog Genomic Divergence from Its Ancestors Canis lupus, German Shepherd Dog, and Different Sheepdogs of European Origin. Genes 2021, 12, 832 .
AMA StyleNina Moravčíková, Radovan Kasarda, Radoslav Židek, Luboš Vostrý, Hana Vostrá-Vydrová, Jakub Vašek, Daniela Čílová. Czechoslovakian Wolfdog Genomic Divergence from Its Ancestors Canis lupus, German Shepherd Dog, and Different Sheepdogs of European Origin. Genes. 2021; 12 (6):832.
Chicago/Turabian StyleNina Moravčíková; Radovan Kasarda; Radoslav Židek; Luboš Vostrý; Hana Vostrá-Vydrová; Jakub Vašek; Daniela Čílová. 2021. "Czechoslovakian Wolfdog Genomic Divergence from Its Ancestors Canis lupus, German Shepherd Dog, and Different Sheepdogs of European Origin." Genes 12, no. 6: 832.
Inbreeding depression is the reduction of performance caused by mating of close relatives. In livestock populations, inbreeding depression has been traditionally estimated by regression of phenotypes on pedigree inbreeding coefficients. This estimation can be improved by utilising genomic inbreeding coefficients. Here we estimate inbreeding depression for insect bite hypersensitivity (IBH) prevalence, the most common allergic horse disease worldwide, in Old Kladruber horse. In a deep pedigree with 3214 horses (187 genotyped), we used a generalised linear mixed model with IBH phenotype from 558 horses examined between 1996 and 2009 (1368 records). In addition to the classical pedigree information, we used the single‐step approach that enabled joint use of pedigree and genomic information to estimate inbreeding depression overall genome and equine leucocyte antigen (ELA) class II region. Significant inbreeding depression was observed in all models fitting overall inbreeding coefficients (odds ratio between 1.018 and 1.074, P < 0.05) with the exception of Kalinowski’s new inbreeding (P = 0.0516). The increase of ELA class II inbreeding was significantly associated with increased prevalence of IBH (odds ratio 1.018; P = 0.027). However, when fitted jointly with the overall inbreeding coefficient, the effect of ELA class II inbreeding was not significant (odds ratio 1.016; P = 0.062). Overall, the higher ELA class II and/or overall inbreeding (pedigree or genomic) was associated with increased prevalence of IBH in Old Kladruber horses. The single‐step approach provides an efficient use of all the available pedigree, genomic, and phenotype information for estimation of overall and regional inbreeding effects.
L. Vostry; H. Vostra‐Vydrova; J. Citek; G. Gorjanc; I. Curik. Association of inbreeding and regional equine leucocyte antigen homozygosity with the prevalence of insect bite hypersensitivity in Old Kladruber horse. Animal Genetics 2021, 52, 422 -430.
AMA StyleL. Vostry, H. Vostra‐Vydrova, J. Citek, G. Gorjanc, I. Curik. Association of inbreeding and regional equine leucocyte antigen homozygosity with the prevalence of insect bite hypersensitivity in Old Kladruber horse. Animal Genetics. 2021; 52 (4):422-430.
Chicago/Turabian StyleL. Vostry; H. Vostra‐Vydrova; J. Citek; G. Gorjanc; I. Curik. 2021. "Association of inbreeding and regional equine leucocyte antigen homozygosity with the prevalence of insect bite hypersensitivity in Old Kladruber horse." Animal Genetics 52, no. 4: 422-430.
This study aimed to assess the level of biodiversity in selected local cattle populations as important food resources in Slovakia. The biodiversity level was derived from the genome-wide data collected for dairy (Jersey), dual-purpose (Slovak Pinzgau, Slovak Spotted), and beef breeds (Charolais, Limousine). The commonly used indices, genomic inbreeding (FROH, FGRM, FHOM, FUNI) and effective population size (NeLD), were used to quantify the impact of relatives mating on the genome of analysed populations. Even if the low NeLD estimates signalise significant loss of genetic variability within populations, the genomic inbreeding under 1% (except Jersey) showed that the intensity of diversity loss is not so rapid and can be managed by the re-arrangement of long-term breeding strategies. The analysis of genetic differentiation degree across populations assumed that the specialisation of breeds during their grading-up led to the specific nucleotide changes, especially in genes responsible for preferred phenotypic traits. The breed-specific differences observed mainly in the genome of Charolais (carcass traits) and Jersey (milk production traits) populations resulted from the polymorphisms in CAPN1 (μ-calpain) and CSN1S2 (casein alpha s2) genes, respectively. Obtained results confirmed that the specific haplotypes are strongly associated with the genetic nature of breed depending on production type.
Radovan Kasarda; Luboš Vostrý; Hana Vostrá-Vydrová; Kristína Candráková; Nina Moravčíková. Food Resources Biodiversity: The Case of Local Cattle in Slovakia. Sustainability 2021, 13, 1296 .
AMA StyleRadovan Kasarda, Luboš Vostrý, Hana Vostrá-Vydrová, Kristína Candráková, Nina Moravčíková. Food Resources Biodiversity: The Case of Local Cattle in Slovakia. Sustainability. 2021; 13 (3):1296.
Chicago/Turabian StyleRadovan Kasarda; Luboš Vostrý; Hana Vostrá-Vydrová; Kristína Candráková; Nina Moravčíková. 2021. "Food Resources Biodiversity: The Case of Local Cattle in Slovakia." Sustainability 13, no. 3: 1296.
Loss off genetic diversity negatively affects most of the modern dog breeds. However, no breed created strictly for laboratory purposes has been analyzed so far. In this paper, we sought to explore by pedigree analysis exactly such a breed—the Czech Spotted Dog (CSD). The pedigree contained a total of 2010 individuals registered since the second half of the 20th century. Parameters such as the mean average relatedness, coefficient of inbreeding, effective population size, effective number of founders, ancestors and founder genomes and loss of genetic diversity—which was calculated based on the reference population and pedigree completeness—were used to assess genetic variability. Compared to the founding population, the reference population lost 38.2% of its genetic diversity, of which 26% is due to random genetic drift and 12.2% is due to the uneven contribution of the founders. The reference population is highly inbred and related. The average inbreeding coefficient is 36.45%, and the mean average relatedness is 74.83%. The effective population size calculated based on the increase of inbreeding coefficient is 10.28. Thus, the Czech Spotted Dog suffered significant losses of genetic diversity that threaten its future existence.
Karolína Machová; Anita Kranjčevičová; Luboš Vostrý; Emil Krupa. Analysis of Genetic Diversity in the Czech Spotted Dog. Animals 2020, 10, 1416 .
AMA StyleKarolína Machová, Anita Kranjčevičová, Luboš Vostrý, Emil Krupa. Analysis of Genetic Diversity in the Czech Spotted Dog. Animals. 2020; 10 (8):1416.
Chicago/Turabian StyleKarolína Machová; Anita Kranjčevičová; Luboš Vostrý; Emil Krupa. 2020. "Analysis of Genetic Diversity in the Czech Spotted Dog." Animals 10, no. 8: 1416.
For the development of an appropriate program for the conservation of animal genetic resources, careful evaluation of the current genetic diversity in endangered breeds was performed. Pedigree data from a total of 38,288 animals registered in studbooks between 1970–2017 from two autochthonous Czech goat breeds, White and Brown Shorthair goats, were analysed to identify factors that may have affected the genetic variability of the breeds. Because the populations of both breeds are closed, there is concern about the loss of genetic variation. The average numbers of equivalent complete generations were 10 and 11 for White Shorthair goat and Bowen Shorthair goat, respectively. The effective numbers of founders contributing to the current genetic pool were 323 and 45, and the effective numbers of ancestors were 90 and 24, respectively. The average inbreeding and relatedness coefficients for the reference populations of the two breeds were 2% and 5.3%, respectively, for White Shorthair goats and 3.7 and 11.5% for Brown Shorthair goats. The corresponding estimates of the effective population size based on an increase in inbreeding or coancestry were 244 and 311, respectively, for White Shorthair goats and 82 and 87 for Brown Shorthair goats. Three kinds of inbreeding coefficients, the classical inbreeding coefficient, the new inbreeding coefficient and the ancestral inbreeding coefficient, were used to quantify the effects of inbreeding and purging on milk production in both analysed breeds. All tested inbreeding coefficients (FX, Fnew) showed a significantly negative influence on milk performance in the White Shorthair goat breed. The purging effect was confirmed based on the difference between FX and Fnew in White Shorthair goats and on the suitability of the statistical model in Brown Shorthair goats. These statistics suggest that genetic variability has decreased and inbreeding depression has occurred and that without changes in the breeding strategy, genetic variability might continue to decline.
H. Vostra-Vydrova; B. Hofmanova; N. Moravcikova; J. Rychtarova; R. Kasarda; K. Machova; M. Brzakova; L. Vostry. Genetic diversity, admixture and the effect of inbreeding on milk performance in two autochthonous goat breeds. Livestock Science 2020, 240, 104163 .
AMA StyleH. Vostra-Vydrova, B. Hofmanova, N. Moravcikova, J. Rychtarova, R. Kasarda, K. Machova, M. Brzakova, L. Vostry. Genetic diversity, admixture and the effect of inbreeding on milk performance in two autochthonous goat breeds. Livestock Science. 2020; 240 ():104163.
Chicago/Turabian StyleH. Vostra-Vydrova; B. Hofmanova; N. Moravcikova; J. Rychtarova; R. Kasarda; K. Machova; M. Brzakova; L. Vostry. 2020. "Genetic diversity, admixture and the effect of inbreeding on milk performance in two autochthonous goat breeds." Livestock Science 240, no. : 104163.
High-quality simple sequence repeat (SSR) markers are invaluable tools for revealing genetic variability which could be utilized for many purposes, such as breeding new varieties or the identifying current ones, among other applications. Based on the analysis of 3.7 million EST sequences and 15 genomic sequences from bacterial artificial chromosome (BAC) libraries, 200 trinucleotide genic (EST)-SSR and three genomic (gSSR) markers were tested, where 17 of them fulfilled all criteria for quality markers. Moreover, the reproducibility of these new markers was verified by two genetics laboratories, with a mean error rate per allele and per locus equal to 0.17%. These markers were tested on 38 accessions of Papaver somniferum and nine accessions of another five species of the Papaver and Argemone genera. In total, 118 alleles were detected for all accessions (median = 7; three to ten alleles per locus) and 88 alleles (median = 5; three to nine alleles per locus) within P. somniferum alone. Multivariate methods and identity analysis revealed high resolution capabilities of the new markers, where all but three pair accessions (41 out of 47) had a unique profile and opium poppy was distinguished from other species.
Jakub Vašek; Daniela Čílová; Martina Melounová; Pavel Svoboda; Pavel Vejl; Radka Štikarová; Luboš Vostrý; Perla Kuchtová; Jaroslava Ovesná. New EST-SSR Markers for Individual Genotyping of Opium Poppy Cultivars (Papaver somniferum L.). Plants 2019, 9, 10 .
AMA StyleJakub Vašek, Daniela Čílová, Martina Melounová, Pavel Svoboda, Pavel Vejl, Radka Štikarová, Luboš Vostrý, Perla Kuchtová, Jaroslava Ovesná. New EST-SSR Markers for Individual Genotyping of Opium Poppy Cultivars (Papaver somniferum L.). Plants. 2019; 9 (1):10.
Chicago/Turabian StyleJakub Vašek; Daniela Čílová; Martina Melounová; Pavel Svoboda; Pavel Vejl; Radka Štikarová; Luboš Vostrý; Perla Kuchtová; Jaroslava Ovesná. 2019. "New EST-SSR Markers for Individual Genotyping of Opium Poppy Cultivars (Papaver somniferum L.)." Plants 9, no. 1: 10.
Received: 2018-05-07 | Accepted: 2018-05-14 | Available online: 2018-11-26https://doi.org/10.15414/afz.2018.21.04.190-193The aim of the present study was to analyse the genetic diversity of the endangered horse breeds kept in the Czech Republic. A set of 13 microsatellites was used for genotyping 349 Silesian Norikers, 397 Norikers, 552 Czech-Moravian Belgian horses, 271 Old Kladrubers (175 greys, 95 blacks) and 241 Hucul horses. The proportion of obtained heterozygosity indicates no major loss of genetic diversity within analyzed breeds. The Wright’s FST and genetic distances indicated genetic segregation of both colour varieties of the Old Kladruber breed and small genetic distances between draft horse breeds. Moreover, the membership probability outputs showed that the frequencies of alleles varied across the three main regions. First region is represented by draft horse breeds, second region is represented by Old Kladruber horse and the last is represented by Hucul breed. The study provides data and information utilizable in the management of conservation programs in order to reduce inbreeding and to minimize loss of genetic variability.Keywords: admixture, endangered breeds, horse, loss of genetic diversityReferencesDelgado J.F., De Andres N., Valera M., Gutierrez J.P., Cervantes I. (2014) Assessment of population structure depending on breeding objectives in Spanish Arabian horse by genealogical and molecular information. Livestock Science, 168, 9–16. DOI: https://dx.doi.org/10.1016/j.livsci.2014.07.012Jombart T., Ahmed I. (2011) adegenet 1.3-1: new tools for the analysis of genome-wide SNP data. Bioinformatics, 27, 3070–3071. DOI: https://dx.doi.org/10.1093/bioinformatics/btr521 Jombart T., Collins C. (2015): A tutorial for diskriminant analysis of principal components (DAPC) using adegenet 2.0.0. MRC Centre for Outbreak Analysis and Modelling. [Online] London: Imperial College London. Available at: http://adegenet.rforge. r-project.org/files/tutorial-dapc.pdf [accessed 20 November 2017].Kasarda R., Vostry L., Moravcikova N., Vostra-Vydrova H., Dovc P., Kadlecik O. (2016) Detailed insight into genetic diversity of the Old Kladruber horse substructure in comparison to the Lipizzan breed. Acta Agriculturae Scandinavica, Section A – Animal Science, 66, 67–74. DOI: https://dx.doi.org/10.1080/09064702.2016.1249400Peakall, R. and Smouse P.E. (2012) GenAlEx 6.5: genetic analysis in Excel. Population genetic software for taching and research-an update. Bioinformatics 28, 2537-2539. DOI: https://dx.doi.org/10.1093/bioinformatics/bts460Szwaczkowski T., Gregula-Kania M., Stachurska A., Borowska A., Jaworski Z., Gruszecki T.M. (2016) Interand intra-genetic diversity in the Polish Konik horse: implications for the conservation program. Canadian Journal of Animal Science, 96 (4), 570–580. DOI: https://dx.doi.org/10.1139/cjas-2015-0173
Lubos Vostry; Hana Vydorvá-Vostrá; Barbora Hofmanová; Nina Moravčíková; Zdenka Veselá; Ivan Majzlík. Genetic diversity in five Czech native horse breeds assessed using microsatellite markers. Acta fytotechnica et zootechnica 2018, 21, 190 -193.
AMA StyleLubos Vostry, Hana Vydorvá-Vostrá, Barbora Hofmanová, Nina Moravčíková, Zdenka Veselá, Ivan Majzlík. Genetic diversity in five Czech native horse breeds assessed using microsatellite markers. Acta fytotechnica et zootechnica. 2018; 21 (4):190-193.
Chicago/Turabian StyleLubos Vostry; Hana Vydorvá-Vostrá; Barbora Hofmanová; Nina Moravčíková; Zdenka Veselá; Ivan Majzlík. 2018. "Genetic diversity in five Czech native horse breeds assessed using microsatellite markers." Acta fytotechnica et zootechnica 21, no. 4: 190-193.
The objective of the present study was to describe the population structure and quantify the effect of inbreeding on litter size in Romanov sheep in the Czech Republic. The analysis was based on the pedigree information of 26,447 animals. The numbers of generations were 19, with average equivalent known generations of 6.41. The effective numbers of founders and ancestors contributing to the current genetic pool were, respectively, 92.96 and 47.41 respectively. The average inbreeding coefficients were 5.5% and the average inbreeding rate was 1%. The corresponding estimates of effective population size were 48.28 and 45.64, based on an individual increase in inbreeding or coancestry, respectively. Classical inbreeding coefficient and two kinds of new inbreeding coefficient were used to quantify the effect of inbreeding. The effect of all tested kind of inbreeding on litter size was statistically significant, but very small (around −0.05 lambs per change of 1% in inbreeding). Statistical difference measured by ΔAICc was not-significant. These statistics suggest that the genetic variability has decreased and inbreeding depression is occurred, and without changes in breeding strategy the genetic variability might continue to decline.
L. Vostry; M. Milerski; J. Schmidova; H. Vostra-Vydrova. Genetic diversity and effect of inbreeding on litter size of the Romanov sheep. Small Ruminant Research 2018, 168, 25 -31.
AMA StyleL. Vostry, M. Milerski, J. Schmidova, H. Vostra-Vydrova. Genetic diversity and effect of inbreeding on litter size of the Romanov sheep. Small Ruminant Research. 2018; 168 ():25-31.
Chicago/Turabian StyleL. Vostry; M. Milerski; J. Schmidova; H. Vostra-Vydrova. 2018. "Genetic diversity and effect of inbreeding on litter size of the Romanov sheep." Small Ruminant Research 168, no. : 25-31.
In this study, we aimed to estimate and compare genetic diversity of two native draught horse breeds and check the possible influence of Noriker breed population on these native breeds. Genetic analyses of relationships and admixture were performed in two native endangered draught horse populations (Silesian Noriker and Czech-Moravian Belgian horses) and one open breed (Noriker). Totally 104 alleles from 13 microsatellite loci were detected in 1298 horses. The average number of alleles per locus was the highest in the Czech-Moravian Belgian horse (7.62) and the lowest in the Silesian Noriker (7.31), the differences were non-significant, whereas the observed and expected heterozygosities per breed ranged from 0.680 (Czech-Moravian Belgian) to 0.719 (Noriker) and from 0.678 (Silesian Noriker) to 0.714 (Noriker). The estimates of Wright’s FST between each pair of breeds indicated a low level of genetic segregation. At the individual level across the analyzed population, formation of two clusters was observed with respect to historical breed development. Moreover, the membership probability outputs showed that the frequencies of alleles varied across the two main regions represented by the Czech-Moravian Belgian and other analyzed breeds. Our results indicated high genetic variability, low inbreeding, and low genetic differentiation, especially between Silesian Noriker and Noriker, which is caused by the high level of admixture. This high level of admixture was in accordance with geographical location, history, and breeding practices of the analyzed breeds. The Silesian Noriker and Noriker breeds seem to be the most genetically related and the decision to consider them as the same population is thus highly supported. The study provides data and information utilizable in the management of conservation programs planned to reduce inbreeding and to minimize loss of genetic variability.
H. Vostra-Vydrova; L. Vostrý; B. Hofmanová; N. Moravčíková; Z. Vesela; I. Vrtkova; A. Novotná; R. Kasarda. Genetic diversity and admixture in three native draught horse breeds assessed using microsatellite markers. Czech Journal of Animal Science 2018, 63, 85 -93.
AMA StyleH. Vostra-Vydrova, L. Vostrý, B. Hofmanová, N. Moravčíková, Z. Vesela, I. Vrtkova, A. Novotná, R. Kasarda. Genetic diversity and admixture in three native draught horse breeds assessed using microsatellite markers. Czech Journal of Animal Science. 2018; 63 (No. 3):85-93.
Chicago/Turabian StyleH. Vostra-Vydrova; L. Vostrý; B. Hofmanová; N. Moravčíková; Z. Vesela; I. Vrtkova; A. Novotná; R. Kasarda. 2018. "Genetic diversity and admixture in three native draught horse breeds assessed using microsatellite markers." Czech Journal of Animal Science 63, no. No. 3: 85-93.
Linear profiling of horses has been used in the Czech Republic for 20 years but without preceding genetic evaluation (predictions of breeding values). The main objective of this study was to estimate genetic parameters of linear profiling of the population of sport horses in the Czech Republic. A linear profiling database was obtained for the period 1997–2015 and it comprised 12 455 horses in total and 25 traits were evaluated. The model equation included fixed effects of gender, horse age, place, classifier*year and individual. Genetic parameters were computed by a single-trait BLUP-AM analysis. The range for heritability coefficients were between 0.05 and 0.31 for linear type traits and between 0.43 and 0.67 for measured traits. Genetic correlations were computed by a two-trait analysis between the evaluated traits and they were in the range of 0.0–0.93. The estimated genetic parameters suggest that a selection programme can be based on the genetic evaluation of linear profiling, which will lead to an improvement in conformation traits according to the defined breeding objectives.
A. Novotná; A. Svitáková; Z. Veselá; L. Vostrý. Estimation of genetic parameters for linear type traits in the population of sport horses in the Czech Republic. Livestock Science 2017, 202, 1 -6.
AMA StyleA. Novotná, A. Svitáková, Z. Veselá, L. Vostrý. Estimation of genetic parameters for linear type traits in the population of sport horses in the Czech Republic. Livestock Science. 2017; 202 ():1-6.
Chicago/Turabian StyleA. Novotná; A. Svitáková; Z. Veselá; L. Vostrý. 2017. "Estimation of genetic parameters for linear type traits in the population of sport horses in the Czech Republic." Livestock Science 202, no. : 1-6.
J. Citek; L. Vostry; H. Vostra-Vydrova; M. Brzakova; V. Prantlova. Genetic parameters of insect bite hypersensitivity in the Old Grey Kladruber horse. Journal of Animal Science 2017, 95, 53 .
AMA StyleJ. Citek, L. Vostry, H. Vostra-Vydrova, M. Brzakova, V. Prantlova. Genetic parameters of insect bite hypersensitivity in the Old Grey Kladruber horse. Journal of Animal Science. 2017; 95 (1):53.
Chicago/Turabian StyleJ. Citek; L. Vostry; H. Vostra-Vydrova; M. Brzakova; V. Prantlova. 2017. "Genetic parameters of insect bite hypersensitivity in the Old Grey Kladruber horse." Journal of Animal Science 95, no. 1: 53.
J. Citek; L. Vostry; H. Vostra-Vydrova; M. Brzakova; V. Prantlova. Genetic parameters of insect bite hypersensitivity in the Old Grey Kladruber horse1. Journal of Animal Science 2017, 95, 53 -58.
AMA StyleJ. Citek, L. Vostry, H. Vostra-Vydrova, M. Brzakova, V. Prantlova. Genetic parameters of insect bite hypersensitivity in the Old Grey Kladruber horse1. Journal of Animal Science. 2017; 95 (1):53-58.
Chicago/Turabian StyleJ. Citek; L. Vostry; H. Vostra-Vydrova; M. Brzakova; V. Prantlova. 2017. "Genetic parameters of insect bite hypersensitivity in the Old Grey Kladruber horse1." Journal of Animal Science 95, no. 1: 53-58.
Open Access Agricultural Journals published by Institute of Agricultural Economics and Information
B. Hofmanová; L. Vostrý; I. Majzlík; H. Vostrá-Vydrová. Characterization of greying, melanoma, and vitiligo quantitative inheritance in Old Kladruber horses. Czech Journal of Animal Science 2016, 60, 443 -451.
AMA StyleB. Hofmanová, L. Vostrý, I. Majzlík, H. Vostrá-Vydrová. Characterization of greying, melanoma, and vitiligo quantitative inheritance in Old Kladruber horses. Czech Journal of Animal Science. 2016; 60 (No. 10):443-451.
Chicago/Turabian StyleB. Hofmanová; L. Vostrý; I. Majzlík; H. Vostrá-Vydrová. 2016. "Characterization of greying, melanoma, and vitiligo quantitative inheritance in Old Kladruber horses." Czech Journal of Animal Science 60, no. No. 10: 443-451.
Jitka Schmidová; Michal Milerski; Alena Svitáková; Luboš Vostrý. Effects of service ram on litter size in Romanov sheep. Small Ruminant Research 2016, 141, 56 -62.
AMA StyleJitka Schmidová, Michal Milerski, Alena Svitáková, Luboš Vostrý. Effects of service ram on litter size in Romanov sheep. Small Ruminant Research. 2016; 141 ():56-62.
Chicago/Turabian StyleJitka Schmidová; Michal Milerski; Alena Svitáková; Luboš Vostrý. 2016. "Effects of service ram on litter size in Romanov sheep." Small Ruminant Research 141, no. : 56-62.
H. Vostrá-Vydrová; L. Vostrý.; Barbora Hofmanova; Emil Krupa; Ludmila Zavadilová. Pedigree analysis of the endangered Old Kladruber horse population. Livestock Science 2016, 185, 17 -23.
AMA StyleH. Vostrá-Vydrová, L. Vostrý., Barbora Hofmanova, Emil Krupa, Ludmila Zavadilová. Pedigree analysis of the endangered Old Kladruber horse population. Livestock Science. 2016; 185 ():17-23.
Chicago/Turabian StyleH. Vostrá-Vydrová; L. Vostrý.; Barbora Hofmanova; Emil Krupa; Ludmila Zavadilová. 2016. "Pedigree analysis of the endangered Old Kladruber horse population." Livestock Science 185, no. : 17-23.
Estimated breeding values and genomic enhanced breeding values for milk production of young genotyped Holstein bulls were predicted using a conventional animal model, ridge regression genomic prediction procedure, genomic best linear unbiased prediction, single-step genomic best linear unbiased prediction, and one-step blending procedures. For prediction, the nation-wide database of domestic Czech production records was combined with deregressed proofs from Interbull files through 2008, which had been transformed by multiple across country evaluation to reflect domestic production conditions. 1259 genotyped bulls had already been proven in 2008. Analyses were run that used Interbull values only for these genotyped bulls and used Interbull values for all available sires. Predictions were validated by comparing correlations of breeding value predictions with estimated breeding values and daughter-yield-deviations after progeny test in 2012 of 140 young genotyped bulls and their associated reliabilities. Combining domestic data with Interbull estimated breeding values improved prediction of both estimated breeding values and genomic enhanced breeding values. Prediction by animal model (traditional estimated breeding values) using only the domestic database had 0.29 validated reliability of prediction; whereas combining the nation-wide domestic database with all available deregressed proofs for genotyped and non-genotyped sires from Interbull resulted in reliability of 0.34, compared to 0.36 when using Interbull data only. The highest reliabilities were for predictions from the single-step genomic best linear unbiased prediction procedure using combined data, or with all available deregressed proofs from Interbull only (one-step blending approach), which reached validated reliabilities for genomic enhanced breeding values predictions 0.53 and 0.54, respectively.
J. Přibyl; J. Bauer; P. Pesek; J. Přibylová; L. Vostrý; L. Zavadilová. Domestic and Interbull information in the single step genomic evaluation of Holstein milk production. Czech Journal of Animal Science 2014, 59, 409 -415.
AMA StyleJ. Přibyl, J. Bauer, P. Pesek, J. Přibylová, L. Vostrý, L. Zavadilová. Domestic and Interbull information in the single step genomic evaluation of Holstein milk production. Czech Journal of Animal Science. 2014; 59 (No. 9):409-415.
Chicago/Turabian StyleJ. Přibyl; J. Bauer; P. Pesek; J. Přibylová; L. Vostrý; L. Zavadilová. 2014. "Domestic and Interbull information in the single step genomic evaluation of Holstein milk production." Czech Journal of Animal Science 59, no. No. 9: 409-415.
The most appropriate model for genetic parameters estimation for calving ease and birth weight in beef cattle was selected. A total of 27 402 field records were available from the Czech Charolais breed. For estimation of genetic parameters for calving ease and body weight, three bivariate models were tested: a linear-linear animal model (L-LM) with calving ease classified into four categories (1 – easy; 2–4 – most difficult), a linear-linear animal model (SC-LM) in which calving ease scores were transformed into Snell scores (Snell 1964) and expressed as percentage of assisted calving (ranging 0–100%), and a bivariate threshold-linear animal model (T-LM) with calving ease classified into four categories (1 – easy, 2–4 – most difficult). All tested models included fixed effects for contemporary group (herd × year × season), age of dam, sex and breed of a calf. Random effects included direct and maternal genetic effects, maternal permanent environmental effect, and residual error. Direct heritability estimates for calving ease and birth weight were, with the use of L-LM, SC-LM, and T-LM, from 0.096 ± 0.013 to 0.226 ± 0.024 and from 0.210 ± 0.024 to 0.225 ± 0.026, respectively. Maternal heritability estimates for calving ease and birth weight were, with the use of L-LM, SC-LM, and T-LM, from 0.060 ± 0.031 to 0.104 ± 0.125 and from 0.074 ± 0.041 to 0.075 ± 0.040, respectively. Genetic correlations of direct calving ease with direct birth weight ranged from 0.46 ± 0.06 to 0.50 ± 0.06 for all tested models; whereas maternal genetic correlations between these two traits ranged from 0.24 ± 0.17 to 0.25 ± 0.53. Correlations between direct and maternal genetic effects within-trait were negative and substantial for all tested models (ranging from –0.574 ± 0.125 to –0.680 ± 0.141 for calving ease and from –0.553 ± 0.122 to –0.558 ± 0.118 for birth weight, respectively), illustrating the importance of including this parameter in calving ease evaluations. Results indicate that any of the tested models could be used to reliably estimate genetic parameters for calving ease for beef cattle in the Czech Republic. However, because of advantages in computation time and practical considerations, genetic analysis using SC-LM (transformed data) is recommended.
L. Vostrý; Z. Vesela; A. Svitáková; H. Vostrá Vydrová. Comparison of models for estimating genetic parameters and predicting breeding values for birth weight and calving ease in Czech Charolais cattle . Czech Journal of Animal Science 2014, 59, 302 -309.
AMA StyleL. Vostrý, Z. Vesela, A. Svitáková, H. Vostrá Vydrová. Comparison of models for estimating genetic parameters and predicting breeding values for birth weight and calving ease in Czech Charolais cattle . Czech Journal of Animal Science. 2014; 59 (No. 7):302-309.
Chicago/Turabian StyleL. Vostrý; Z. Vesela; A. Svitáková; H. Vostrá Vydrová. 2014. "Comparison of models for estimating genetic parameters and predicting breeding values for birth weight and calving ease in Czech Charolais cattle ." Czech Journal of Animal Science 59, no. No. 7: 302-309.
Genetic evaluation of the growth of bulls at a performance test station was performed using a single-trait model (STAM) and multi-trait models that included pre-weaning growth. The growth of the bulls was represented by the average daily gain in the test (ADGT). Pre-weaning growth was expressed...
L. Vostrý; Z. Veselá; E. Krupa. Genetic evaluation of the growth of beef bulls at a performance test station. Journal of Animal and Feed Sciences 2014, 23, 37 -44.
AMA StyleL. Vostrý, Z. Veselá, E. Krupa. Genetic evaluation of the growth of beef bulls at a performance test station. Journal of Animal and Feed Sciences. 2014; 23 (1):37-44.
Chicago/Turabian StyleL. Vostrý; Z. Veselá; E. Krupa. 2014. "Genetic evaluation of the growth of beef bulls at a performance test station." Journal of Animal and Feed Sciences 23, no. 1: 37-44.
Objectives of the study were to examine alternative measures of growth potential of bulls in testing stations, determine whether genetic parameter estimates of such traits changed over time, and examine whether existing methods for performance testing were appropriate. Records from 1980 to 2010 of 44 425 Fleckvieh bulls in Czech progeny testing stations were analyzed. The following traits were examined: weight at the beginning of the test (150th day of age), weight at the end of the test (530th day of age), gain from birth to the beginning of the test, and gain during the test. Fixed effects in five multi-trait animal models were station-year-season groups, linear and quadratic regressions on age, and regression on heterozygosity (proportion of an individual’s loci with alleles from different ancestor breeds). Random effects included additive genetic, permanent environment, and residual variances. Separate analyses were conducted in four consecutive time periods (1980–1987, 1988–1992, 1993–1997, and 1998–2010). Across these time intervals, estimates of additive genetic variance decreased for all of the traits, while estimates of residual variances increased. In consequence, heritability estimates for all of the traits decreased over time. This decrease was most apparent for gain during the test, for which heritability declined by more than 50% over the course of the study. Results demonstrate that over three decades, the system of testing came into conflict with genetic improvement of the breed, possibly because the measured traits changed genetically over the course of selection. Regular analysis of the recorded data, re-estimation of genetic parameters in relation to time, and appropriate modification of existing methods of rearing/fattening in station tests are required. When such inspections are neglected, data from the testing stations may not accurately reflect genetic merit of individual animals.
A. Svitáková; J. Bauer; J. Přibyl; Z. Vesela; L. Vostrý. Changes over time in genetic parameters for growth in bulls and assessment of suitability of test methods. Czech Journal of Animal Science 2014, 59, 19 -25.
AMA StyleA. Svitáková, J. Bauer, J. Přibyl, Z. Vesela, L. Vostrý. Changes over time in genetic parameters for growth in bulls and assessment of suitability of test methods. Czech Journal of Animal Science. 2014; 59 (No. 1):19-25.
Chicago/Turabian StyleA. Svitáková; J. Bauer; J. Přibyl; Z. Vesela; L. Vostrý. 2014. "Changes over time in genetic parameters for growth in bulls and assessment of suitability of test methods." Czech Journal of Animal Science 59, no. No. 1: 19-25.
L. Vostrý; M. Milerski. Genetic and non-genetic effects influencing lamb survivability in the Czech Republic. Small Ruminant Research 2013, 113, 47 -54.
AMA StyleL. Vostrý, M. Milerski. Genetic and non-genetic effects influencing lamb survivability in the Czech Republic. Small Ruminant Research. 2013; 113 (1):47-54.
Chicago/Turabian StyleL. Vostrý; M. Milerski. 2013. "Genetic and non-genetic effects influencing lamb survivability in the Czech Republic." Small Ruminant Research 113, no. 1: 47-54.