Gavrilovic B. Bobic, Andersson K., Linde Forsberg C. (2008): Reproductive patterns in the domestic dog—A retrospective study of the Drever breed. Theriogenology, 70, 783-794 https://doi.org/10.1016/j.theriogenology.2008.04.051Boichard D, Maignel L, Verrier É (1997): The value of using probabilities of gene origin to measure genetic variability in a population. Genetics Selection Evolution, 29, 5- https://doi.org/10.1186/1297-9686-29-1-5Borge Kaja Sverdrup, Tønnessen Ragnhild, Nødtvedt Ane, Indrebø Astrid (2011): Litter size at birth in purebred dogs—A retrospective study of 224 breeds. Theriogenology, 75, 911-919 https://doi.org/10.1016/j.theriogenology.2010.10.034Calboli Federico C. F., Sampson Jeff, Fretwell Neale, Balding David J. (2008): Population Structure and Inbreeding From Pedigree Analysis of Purebred Dogs. Genetics, 179, 593-601 https://doi.org/10.1534/genetics.107.084954Dolf G., Gaillard C., Schelling C., Hofer A., Leighton E. (2008): Cryptorchidism and sex ratio are associated in dogs and pigs1. Journal of Animal Science, 86, 2480-2485 https://doi.org/10.2527/jas.2007-0607 Gierdziewicz M., Kania-Gierdziewicz J., Kalinowska B. (2011): Analysis of genetic structure of the Beagle population in the area of Cracow Branch of the Polish Kennel Club. Animal Science Papers and Reports, 29, 359–367.Gubbels Ed.J., Scholten Janneke, Janss Luc, Rothuizen Jan (2009): Relationship of cryptorchidism with sex ratios and litter sizes in 12 dog breeds. Animal Reproduction Science, 113, 187-195 https://doi.org/10.1016/j.anireprosci.2008.07.004Hedhammar Åke A., Indrebø Astrid (2011): Rules, regulations, strategies and activities within the Fédération Cynologique Internationale (FCI) to promote canine genetic health. The Veterinary Journal, 189, 141-146 https://doi.org/10.1016/j.tvjl.2011.06.011Hedhammar Åke A., Malm Sofia, Bonnett Brenda (2011): International and collaborative strategies to enhance genetic health in purebred dogs. The Veterinary Journal, 189, 189-196 https://doi.org/10.1016/j.tvjl.2011.06.018 Kania-Gierdziewicz J. (2013): Analysis of population genetic structure as a tool to preserve genetic resources – a review. Wiadomości Zootechniczne, 51, 107–120. (in Polish) Kania-Gierdziewicz J., Kalinowska B., Gierdziewicz M. (2011): Inbreeding and relationship in the German Shepherd dog population in area of Cracow Branch of Polish Kennel Club. Scientific Annals of Polish Society of Animal Production, 7, 21–29. Kania-Gierdziewicz J., Gierdziewicz M., Kalinowska B. (2014): Inbreeding and relationship analysis of the Golden and Labrador Retriever populations in the Cracow Branch of the Polish Kennel Club. Scientific Annals of Polish Society of Animal Production, 10, 9–19. (in Polish)Kania-Gierdziewicz Joanna, Gierdziewicz Maciej, Budzyński Bartłomiej (2015): Genetic Structure Analysis of Tatra Shepherd Dog Population From Tatra Mountain Region. Annals of Animal Science, 15, 323-335 https://doi.org/10.2478/aoas-2014-0090Leroy G., Baumung R. (2011): Mating practices and the dissemination of genetic disorders in domestic animals, based on the example of dog breeding. Animal Genetics, 42, 66-74 https://doi.org/10.1111/j.1365-2052.2010.02079.xLeroy G., Rognon X., Varlet A., Joffrin C., Verrier E. (2006): Genetic variability in French dog breeds assessed by pedigree data. Journal of Animal Breeding and Genetics, 123, 1-9 https://doi.org/10.1111/j.1439-0388.2006.00565.xLeroy Grégoire, Phocas Florence, Hedan Benoit, Verrier Etienne, Rognon Xavier (2015): Inbreeding impact on litter size and survival in selected canine breeds. The Veterinary Journal, 203, 74-78 https://doi.org/10.1016/j.tvjl.2014.11.008Mäki K. (2010): Population structure and genetic diversity of worldwide Nova Scotia Duck Tolling Retriever and Lancashire Heeler dog populations. Journal of Animal Breeding and Genetics, 127, 318-326 https://doi.org/10.1111/j.1439-0388.2010.00851.xMandigers Paul J.J., Ubbink Geert J., Broek Jan Vanden, Bouw Job (1994): Relationship between litter size and other reproductive traits in the dutch kooiker dog. Veterinary Quarterly, 16, 229-232 https://doi.org/10.1080/01652176.1994.9694454Mostert BE, Van Marle-Köster E, Visser C, Oosthuizen M (2016): Genetic analysis of pre-weaning survival and inbreeding in the Boxer dog breed of South Africa. South African Journal of Animal Science, 45, 476- https://doi.org/10.4314/sajas.v45i5.4Nicholas Frank W., Wade Claire M. (2011): Canine genetics: A very Special Issue. The Veterinary Journal, 189, 123-125 https://doi.org/10.1016/j.tvjl.2011.06.006Nielen A.L.J, van der Beek S., Ubbink G.J., Knol B.W. (2001): Epidemiology: Population parameters to compare dog breeds: Differences between five dutch purebred populations. Veterinary Quarterly, 23, 43-49 https://doi.org/10.1080/01652176.2001.9695075Ólafsdóttir Gudbjörg Á., Kristjánsson Theódór (2008): Correlated pedigree and molecular estimates of inbreeding and their ability to detect inbreeding depression in the Icelandic sheepdog, a recently bottlenecked population of domestic dogs. Conservation Genetics, 9, 1639-1641 https://doi.org/10.1007/s10592-008-9526-0Oliehoek Pieter A, Bijma Piter, van der Meijden Arie (2009): History and structure of the closed pedigreed population of Icelandic Sheepdogs. Genetics Selection Evolution, 41, - https://doi.org/10.1186/1297-9686-41-39Różańska-Zawieja Jolanta, Nienartowicz-Zdrojewska Anna, Mucha Marta, Sobek Zbigniew, Stanisławski Daniel, Gierdziewicz Maciej, Kania-Gierdziewicz Joanna (2013): Evaluation of inbreeding and relationship coefficients in Hovawart dogs and analysis of trends in coat colour changes / Ocena stopnia zinbredowania i spokrewnienia psów rasy hovawart oraz analiza tendencji zmian umaszczenia. Annals of Animal Science, 13, 253-262 https://doi.org/10.2478/aoas-2013-0007Šichtař J., Dokoupilová A., Vostrý L., Rajmon R., Jílek F. (2016): Factors affecting reproductive efficiency in German Shepherd bitches producing litters for Police of the Czech Republic. Czech Journal of Animal Science, 61, 578-585 https://doi.org/10.17221/89/2015-CJASShariflou Mohammad R., James John W., Nicholas Frank W., Wade Claire M. (2011): A genealogical survey of Australian registered dog breeds. The Veterinary Journal, 189, 203-210 https://doi.org/10.1016/j.tvjl.2011.06.020Tønnessen R., Borge K. Sverdrup, Nødtvedt A., Indrebø A. (2012): Canine perinatal mortality: A cohort study of 224 breeds. Theriogenology, 77, 1788-1801 https://doi.org/10.1016/j.theriogenology.2011.12.023Urfer Silvan R (2009): Inbreeding and fertility in Irish Wolfhounds in Sweden: 1976 to 2007. Acta Veterinaria Scandinavica, 51, - https://doi.org/10.1186/1751-0147-51-21Voges S., Distl O. (2009): Inbreeding trends and pedigree analysis of Bavarian mountain hounds, Hanoverian hounds and Tyrolean hounds. Journal of Animal Breeding and Genetics, 126, 357-365 https://doi.org/10.1111/j.1439-0388.2009.00800.xWang S., Leroy G., Malm S., Lewis T., Strandberg E., Fikse W.F. (2017): Merging pedigree databases to describe and compare mating practices and gene flow between pedigree dogs in France, Sweden and the UK. Journal of Animal Breeding and Genetics, 134, 152-161 https://doi.org/10.1111/jbg.12242Windig J.J., Oldenbroek K. (2015): Genetic management of Dutch golden retriever dogs with a simulation tool. Journal of Animal Breeding and Genetics, 132, 428-440 https://doi.org/10.1111/jbg.12149