Genetic connectedness between seven European countries for performance in jumping competitions of warmblood riding horses |
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| Authors: | C. Ruhlmann E. Bruns E. Fraehr J. Philipsson S. Janssens K. Quinn E. Thorén Hellsten A. Ricard |
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| Affiliation: | 1. Station d''Amélioration Génétique des Animaux (SAGA), Institut National de la Recherche Agronomique (INRA), BP 52627, F-31326 Castanet Tolosan, France;2. University of Göttingen, Institut Tierzucht und Haustiergenetik, D-37075 Göttingen, Germany;3. Danish Agricultural Advisory Centre National Department of Horse Breeding Udkearsvej 15, Skejby DK-8200 Aarhus, Denmark;4. Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Box 7023, S-750 07 Uppsala, Sweden;5. Katholieke Universiteit Leuven, Kasteelpark Arenberg 30, B-3001 Heverlee, Belgium;6. Irish Horse Board, Block B, Maynooth Business Campus, Maynooth, Co. Kildare, Ireland;1. Department of Veterinary Clinical and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg, Denmark;2. Danish Warmblood Association, Vilhelmsborg Alle 1, 8320 Mårslet, Denmark;1. Department of Neurosurgery & Stroke Center, Rakuwakai Otowa Hospital, Otowachinji-cho 2, Yamashina-ku, Kyoto 607-8602, Japan;2. Department of Neurosurgery, Hamamatsu Rosai Hospital, 25 Shogen-cho, Higashi-ku, Hamamatsu city, Shizuoka 430-8525, Japan;3. Interfaculty Initiative in Information Studies/Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan;4. Department of Neurosurgery, Kishiwada Municipal Hospital, 1001 Gakuhara-cho, Kishiwada city, Osaka 596-8501, Japan;1. Department of Cognitive Sciences, Education and Cultural Studies, University of Messina, Messina, Italy;2. Department of Veterinary Sciences, Polo Universitario Annunziata, University of Messina, Messina, Italy;3. Department of Biomedical Sciences and Morpho-functional Imaging, University of Messina, Messina, Italy;1. Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, PO Box 7023, SE-750 07 Uppsala, Sweden;2. Department of Equine Studies, Swedish University of Agricultural Sciences, PO Box 7046, SE-750 07 Uppsala, Sweden;3. Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-750 07 Uppsala, Sweden |
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| Abstract: | The aim of this study was to evaluate the genetic connectedness between seven European populations of show jumping horses. Data on stallions bred for jumping and their pedigree up to three generations were provided by seven countries, including 6317 stallions and 22 324 different horses. Four different methods were used to estimate the genetic connectedness. Common stallions between countries varied from 0 to 308 and common horses from 130 to 1166. “Genetic similarities” were not the optimal measure of connectedness as number of progeny by country by stallion was not balanced. Correlation between estimates of country effects was computed in a mixed model including the genetic value of horses (h2 = 0.20, all relationships included). For Germany, Belgium, France and The Netherlands, these correlations were 0.32 to 0.51 corresponding to a balanced scheme with 11 to 19 progeny per stallion per country. Other correlations ranged from 0.08 to 0.27. Another method to evaluate the connectedness was (i) to simulate a systematic difference between the true genetic level of countries, (ii) performing a BLUP and (iii) measuring the percentage of the initial difference that could be found between the estimated genetic levels of the corresponding countries. In 50% of the country pairs, 50% or more of the initial genetic difference was estimated. It was concluded that the genetic connectedness will allow the estimation of genetic correlations. |
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