SHORT COMMUNICATION doi:10.1111/j.1365-2052.2006.01480.x Porcine OGN and ASPN: mapping, polymorphisms and use for quantitative trait loci identification for growth and carcass traits in a Meishan · Pie´train intercross
A. Stratil*, M. Van Poucke†, H. Bartenschlager‡, A. Knoll*,§, M. Yerle¶, L. J. Peelman†, M. Kopecˇny´* and H. Geldermann‡ *Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, 277 21 Libeˇ chov, Czech Republic. †Department of Animal Nutrition, Genetics, Breeding and Ethology, Faculty of Veterinary Medicine, Ghent University, Heidestraat 19, B-9820 Merelbeke, Belgium. ‡Department of Animal Breeding and Biotechnology, Institute of Animal Husbandry and Breeding, University of Hohenheim, Garbenstrasse 17, D-70593 Stuttgart, Germany. §Department of Animal Morphology, Physiology and Genetics, Mendel University of Agriculture and Forestry, Zemeˇ deˇ lska´ 1, 613 00 Brno, Czech Republic. ¶INRA, Laboratoire de Genetique Cellulaire, 31326 Castanet-Tolosan, France
Summary The porcine orthologues of human chromosome HSA9q22.31 genes osteoglycin (OGN) and asporin (ASPN) were mapped to porcine chromosome SSC3 using linkage analysis and a somatic cell hybrid panel. This mapping was refined to SSC3q11 using fluorescence in situ hybridization. These results confirm the existence of a small conserved synteny group be- tween SSC3 and HSA9. Polymorphisms were revealed in both genes, including a penta- nucleotide microsatellite (SCZ003)inOGN and two single nucleotide polymorphisms (AM181682.1:g.780G>T and AM181682.1:g.825T>C) in ASPN. The two genes were included in a set of markers for quantitative trait loci (QTL) mapping on SSC3 in the
Hohenheim Meishan · Pie´train F2 family. Major QTL for growth and carcass traits were centred in the ASPN–SW902 region.
Keywords asporin, fluorescence in situ hybridization mapping, linkage analysis, osteoglycin, quantitative trait loci, somatic cell hybrid mapping.
The osteoglycin or mimecan (OGN; formerly known as OIF) to SSC3 by radiation hybrid (RH) mapping (Rink et al. and asporin (ASPN) genes belong to the small secreted leu- 2002; Mikawa et al. 2004). More recently, Meyers et al. cine-rich proteoglycans (SLRP) family, which are important (2005) mapped four porcine loci (one expressed sequence for collagen fibrillogenesis, cellular growth, differentiation tag and three BAC-end sequences) orthologous to HSA9 and migration (Tasheva et al. 2004). The two genes, to- sequences to SSC3 by RH mapping, and they assumed that gether with two other members of the SLRP family, extra- these loci were located on SSC3q11 near the centromere cellular matrix protein 2 (ECM2) and osteoadherin (OMD), using cytogenetic information. In this article, we provide form a cluster that is located on human chromosome further evidence that a small syntenic segment homologous HSA9q22.31 (Henry et al. 2001) between TPM2 and to HSA9 is located on SSC3q11 within a quantitative trait TGFBR1 (http://www.ensembl.org/Homo_sapiens/). TPM2 loci (QTL) interval for growth and carcass traits. Polymor- and TGFBR1 were previously mapped to porcine chromo- phisms identified in the two genes were added to a set some SSC1 (Kopecˇny´ et al. 2002, 2004), in agreement with of markers and used for QTL mapping of SSC3 in a heterologous chromosome painting (Goureau et al. 1996). Meishan · Pie´train (M · P) intercross. Based on these results, the location of OGN and ASPN on The Hohenheim M · P family used for linkage analysis SSC1 would be expected. and QTL mapping was previously described by Geldermann However, single porcine loci that were orthologous to et al. (2003). Unrelated pigs of eight breeds (Large White, human chromosome 9 sequences were previously assigned Landrace, Czech Meat Pig, Pie´train, Black Pied Prestice, Hampshire, Duroc and Meishan) were used to estimate Address for correspondence frequencies of the OGN and ASPN alleles. Genomic A. Stratil, Institute of Animal Physiology and Genetics, Academy of fragments specific for OGN (2007 bp) and ASPN (1493 bp) Sciences of the Czech Republic, 277 21 Libeˇ chov, Czech Republic. were obtained by polymerase chain reaction (PCR) using E-mail: [email protected] primers presented in Table S1 and standard PCR conditions. Accepted for publication 5 May 2006