Handbook of Human Genetic Linkage
Joseph Terwilliger and Jürg Ott
Johns Hopkins University Press, 1994
TABLE OF CONTENTS
Background Material
The purpose of this book
Notation and definitions
A review of the principles of linkage analysis
Installing the LINKAGE programs
Part I. TWO-POINT LINKAGE ANALYSIS
The File System Used by LINKAGE
Pedigree drawing
Pedigree files
MAKEPED
Parameter files (PREPLINK)
Running the LINKAGE Programs MLINK and ILINK
Theoretical analysis
MLINK
ILINK
Setting Up a Linkage Analysis Using LCP
LCP
Elementary Usage of the Affected Status Locus Type
Autosomal dominant disease
Autosomal recessive disease
Incomplete penetrance
Sex-linked Recessive Diseases
Sex-linked diseases
The preparation of pedigree and parameter files
Performing the linkage analysis
Loops
Consanguinity loops
Marriage loops
The LOOP program
Locus Types I: Allele Number and Binary Factor
Codominance
Multiple factors: two alleles (the CEPH database)
Dominance and recessivity
Systems with dominance and codominance: the ABO blood group
Advanced Applications of Affected Status I: Incomplete Penetrance Revisited
Age-dependent penetrance
Distribution functions versus density functions
Phenocopies
Advanced Applications of the Affection Status Locus Type II
Generalized definition of the 2 phenotype
Codominant marker loci
Carrier status
Diagnostic uncertainty
ABO blood group revisited
The LIPED Program
Characteristics of LIPED
An example: monozygotic twins
Solutions to the Exercises in Part I
Part II. MULTIPOINT LINKAGE ANALYSIS WITH THE LINKAGE PACKAGE
Gene Mapping in CEPH Families
What is CEPH?
Why use the CEPH panel?
CLINKAGE
General strategies for map construction
The Locus-ordering Problems: CILINK
How to order a set of loci?
CILINK
CMAP and Adding a New Locus
Multipoint lod score
Computing multipoint lod scores with CMAP
Map distance
Mapping a Disease Locus against a Fixed Map of Markers
Multipoint testing and estimating linkage with disease
Disease gene mapping
Exclusive Mapping
Using negative test results
Two-point exclusion mapping
Multipoint exclusion mapping
Model errors and exclusion mapping
Sex Difference in Recombination Rates: Multipoint Case
Estimating sex-specific recombination rates
Constant female-to-male map distance ration
Using sex difference in general pedigree data
Using sex difference in recombination fraction in LINKMAP
Introduction to Interference
What is interference?
Three-point analysis of interference
Sex-specific interference analysis
Solutions to the Exercises in Part II
Part III. ADVANCED TOPICS IN LINKAGE ANALYSIS
Mutation Rates and the LINKAGE Programs
Mutations
Allowing for mutation rates in LINKAGE
Mutation-selection equilibrium
Sex-linked lethal recessive disease
Gene Frequencies and LINKAGE
How are gene frequencies used in the LINKAGE programs?
The consequences of using incorrect gene frequencies
Estimation of gene frequencies
Linkage Disequilibrium between Alleles at Marker Loci
What is linkage disequilibrium?
Population-based sampling and the EH program
Estimating disequilibrium from pedigree data
Linkage Disequilibrium and Disease Loci
Case-control sampling
More complicated penetrance models
The theory behind the haplotype relative risk
The application of the HRR and the CONTING program
Paired sampling and the CHIPROB program
Haplotype-based haplotype relative risk
Using ILINK to estimate linkage disequilibrium with disease
Using linkage disequilibrium in the LINKAGE programs
Parametric Analysis of Complex Diseases
Complex diseases
Entering data for multiple diagnostic schemes
Choosing an appropriate single-locus parametric model
Interpreting lod score maximized over models
Combining diagnostic criteria in a single model
Affecteds-only analysis
Nonparametric Methods of Linkage Analysis
Identity by descent versus identity by state
Affected sib-pair analysis
Affected pedigree member method
When to use nonparametric methods
How to do sib-pair analysis
Extended sib-pair analysis and the ESPA program
Using the ESPA program
Genetic Heterogeneity
Genetic heterogeneity
Test for homogeneity given linkage
Using the HOMOG program
Computer Simulation Method
Random numbers and simulation
Pedigree simulation by tossing a coin
The SIMULATE program
Possible applications of simulation under H0
How to use the SIMULATE program
Analyzing the simulated replicates with MLINK and ILINK
Analyzing the simulated replicates with MSIM
ISIM
SLINK
LSIM
Solution to the Exercise in Part III
APPENDICES
A. The Linkage Utility Programs
B. Practical Considerations
C. List of Programs, and Where to Obtain Them