A consensus linkage map for swine chromosome 7 |
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| Authors: | G A Rohrer L J Alexander C W Beattie P Wilkie G H Flickinger L B Schook A A Paszek L Andersson P Mariani L Marklund M Fredholm B Hoyheim A L Archibald V H Nielsen D Milan & M A M Groenen |
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| Institution: | USDA, ARS, US Meat Animal Research Center (MARC), Clay Center, NE 68933, USA,;Department of Veterinary PathoBiology, University of Minnesota, 1988 Fitch Ave., St Paul, MN 55108, USA,;Present address: DEKALB Swine Breeders, Inc., 23179 #5 Rd., Plains, KS 67869, USA,;Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala Biomedical Center, S-75124 Uppsala, Sweden,;Department of Animal Production and Animal Health, The Royal Veterinary and Agricultural University, Bulowsvej 13, DK-1870 Frederiksberg C, Copenhagen, Denmark,;Norwegian College of Veterinary Medicine, Department of Biochemistry, Physiology &Nutrition, PO Box 8146 DEP, N-0033 Oslo, Norway,;Roslin Institute (Edinburgh), Roslin, Midlothian EH25 9PS, UK,;National Institute of Animal Science, Department of Animal Physiology, Foulum, Denmark,;INRA, Laboratoire de Genetique Cellulaire, BP 27, 31326 Castanet Tolosan Cedex, France ,;Wageningen Agricultural University, Department of Animal Breeding, Marijkeweg 40, 6709 PG Wageningen, The Netherlands |
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| Abstract: | The First International Workshop on Swine Chromosome 7 (SSC7) was held in Minnesuing, Wisconsin, USA on 21–24 September 1995. The objective was to develop a comprehensive linkage map for porcine chromosome 7 by combining genotypic data from four swine reference populations. Contributions of genotypic data were made from the US Meat Animal Research Center, the University of Minnesota, the PiGMaP consortium and the Scandinavian consortium. Primers for selected sequence tagged site markers, to be genotyped across the reference populations, were exchanged to integrate individual maps of SSC7. Eighty-six loci were genotyped; these loci represented microsatellite, minisatellite, single-strand conformation polymorphism, restriction fragment length polymorphism, erythrocyte antigen and protein polymorphisms. Eighteen genes were mapped, including 12 markers within class I, class II and class III regions (four markers in each class) of the swine major histocompatibility complex. Forty-two markers were either genotyped on more than one population or were included in a haplotype system and used to develop skeletal linkage maps that spanned 147·6, 212·7 and 179·5 cM for the male, female and sex-average maps, respectively. A comprehensive linkage map was developed incorporating those markers with more than 30 informative meioses. The comprehensive map was slightly longer than the skeletal map, at 153·3, 215·3 and 183·8 cM, respectively, with only three intervals greater than 10 cM. These results significantly improve the genetic resolution of the porcine chromosome 7 map and represent an accurate approach for the merging of genetic maps produced in different reference populations. |
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| Keywords: | consensus map pig SSC7 |
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