The main aim of this proposal is to continue research in the following four areas (i) theoretical aspects of ascertainment sampling, in particular the development of ascertainment-assumption-free methods for pedigrees, for continuous characters and in regression problems, and to apply the theory to the estimation of parameters of genetic diseases; (ii) developments associated with the sampling theory of selectively neutral alleles, in particular the theory concerning age-order of alleles: (iii) practical aspects of the concept of a """"""""minimum viable population size"""""""", applied to zoo and similar small populations, focussing on both genetic and demographic concepts; (iv) further development of the theory of random functions, in particular as it relates to population genetics. Since the proposed research is theoretical rather than experimental, there is no experimental design in the usual laboratory sense. The strategy of the research is to confirm theoretical predictions using simulated and real data using standard statistical methods. Computing of both mathematical functions and simulated """"""""data"""""""" will be used throughout.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM021135-17
Application #
3270278
Study Section
Genetics Study Section (GEN)
Project Start
1974-04-01
Project End
1992-06-30
Budget Start
1990-07-01
Budget End
1991-06-30
Support Year
17
Fiscal Year
1990
Total Cost
Indirect Cost
Name
University of Pennsylvania
Department
Type
Schools of Arts and Sciences
DUNS #
042250712
City
Philadelphia
State
PA
Country
United States
Zip Code
19104
Spielman, R S; Ewens, W J (1998) A sibship test for linkage in the presence of association: the sib transmission/disequilibrium test. Am J Hum Genet 62:450-8
Spielman, R S; Ewens, W J (1996) The TDT and other family-based tests for linkage disequilibrium and association. Am J Hum Genet 59:983-9
McGinnis, R E; Ewens, W J; Spielman, R S (1995) The TDT reveals linkage and linkage disequilibrium in a rare disease. Genet Epidemiol 12:637-40
Nolan, P M; Sollars, P J; Bohne, B A et al. (1995) Heterozygosity mapping of partially congenic lines: mapping of a semidominant neurological mutation, Wheels (Whl), on mouse chromosome 4. Genetics 140:245-54
Ewens, W J; Spielman, R S (1995) The transmission/disequilibrium test: history, subdivision, and admixture. Am J Hum Genet 57:455-64
Spielman, R S; McGinnis, R E; Ewens, W J (1993) Transmission test for linkage disequilibrium: the insulin gene region and insulin-dependent diabetes mellitus (IDDM). Am J Hum Genet 52:506-16
Tavare, S; Ewens, W J; Joyce, P (1989) Is knowing the age-order of alleles in a sample useful in testing for selective neutrality? Genetics 122:705-11
Ewens, W J; Hodge, S E; Ping, F H (1986) The effects of a known family-size distribution on the estimation of genetic parameters. Am J Hum Genet 38:555-66
Ewens, W J; Spielman, R S (1985) Statistical properties of maximum likelihood estimators for genetic parameters of HLA-linked diseases. Am J Hum Genet 37:1172-91