Abstract
Many disorders such as celiac disease do not conform to a simple Mendelian model of inheritance and display a complex pattern of inheritance indicative of the interaction of a number of distinct susceptibility genes. Susceptibility to celiac disease is genetically determined by possession of specific HLA DQ alleles, acting in concert with one or more non-HLA-linked genes. Haplotypesharing probabilities across the HLA region in affected sibling pairs suggest that genes within the major histocompatibility complex (MHC) contribute no more than 30% of the sibling familial risk of celiac disease, making the non-HLA-linked gene (or genes) the stronger determinant of celiac disease susceptibility (1). Locating these non-HLA-linked genes can be undertaken by either linkage or association. The relative merits of these two approaches depend critically on the frequency and genotypic risks associated with susceptibility genes.
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Houlston, R. S. and Ford, D. (1996) Genetics of coeliac disease. QJM 89, 737–743.
Risch, N. (1990) Linkage strategies for genetically complex traits. II. The power of affected relative pairs. Am. J. Hum. Genet. 46, 229–241.
Holmans, P. (1993) Asyptoric properties of affected-sib-pair analysis. Am. J. Hum. Genet. 52(2), 362–374.
Holmans, P. (1993) Asyptoric properties of affected-sib-pair linkage analysis. Am. J. Hum. Genet. 52, 362–374.
Kruglyak, L. and Lander, E. S. (1995) Complete multipoint sib-pair analysis of qualitative and quantitative traits. Am. J. Hum. Genet. 57, 439–454.
Kruglyak, L., Daly, M. J., Reeve-Daly, M. P., and Lander, E. S. (1996) Parametric and nonparametric linkage analysis: a unified multipoint approach. Am. J. Hum. Genet. 58, 1347–1363.
Lander, E. and Kruglyak, L. (1995) Genetic dissection of complex traits: guidelines for interpreting and reporting linkage results. Nat. Genet. 11, 241–247.
Hodge, S. E. (1984) The information contained in multiple sibling pairs. Genet. Epidemiol. 1, 109–122.
Risch, N. (1990) Linkage strategies for genetically complex traits. III. The effect of marker polymorphism on analysis of affected relative pairs. Am. J. Hum. Genet. 46, 242–253.
Weeks, D. E., Ott, J., and Lathrop, G. M. (1989) SLINK: a general simulation program for linkage analysis. Am. J. Hum. Genet. 47, A204.
Spielman, R. S. and Ewens, W. J. (1996) The TDT and other family-based tests for linkage disequilibrium and association. Am. J. Hum. Genet. 59, 983–989.
Ploughman, L. M. and Boehnke, M. (1989) Estimating the power of a proposed linkage study for a complex trait. Am. J. Hum. Genet. 44, 543–551.
Terwilliger, J. D. (1995) A powerful likelihood method for the analysis of linkage disequilibrium between trait loci and one or more polymorphic marker loci. Am. J. Hum. Genet. 56, 777–787.
Morris, A. P., Curnow, R. N., and Whittaker, J. C. (1997) Randomisation tests of disease-marker associations. Ann. Hum. Genet. 61, 49–60.
Sham, P. C. and Curtis, D. (1995) An extended transmission/disequilibrium test (TDT) for multi-allele marker loci. Ann. Hum. Genet. 59, 323–336.
Risch, N. and Merikangas, K. (1996) The future of genetic studies of complex human disease. Science 273, 1516, 1517.
Curtis, D. and Sham, P. C. (1995) A note on the application of the transmission disequilibrium test when a parent is missing. Am. J. Hum. Genet. 56, 811, 812.
Camp, N. J. (1997) Genomewide transmission/disequilibrium testing—consideration of the genotypic relative risks at disease loci. Am. J. Hum. Genet. 61, 1424–1430.
Bevan, S., Popat, S., Ferguson, A., et al. Contribution of the MHC region to the familial risk of coeliac disease. J. Med. Genet. 36(9), 687–690.
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© 2000 Humana Press Inc., Totowa, NJ
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Bevan, S., Houlston, R.S. (2000). Linkage and the Transmission Disequilibrium Test in Complex Traits. In: Marsh, M.N. (eds) Celiac Disease. Methods in Molecular Medicine, vol 41. Humana Press. https://doi.org/10.1385/1-59259-082-9:033
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DOI: https://doi.org/10.1385/1-59259-082-9:033
Publisher Name: Humana Press
Print ISBN: 978-0-89603-650-5
Online ISBN: 978-1-59259-082-7
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