Replicating genetic linkage in the collaborative study on the genetics of alcoholism (COGA)

T. Reich, A. Goate, H. Edenberg, J. Rice, T. Foroud, V. Hesselbrock, M. Schuckit, B. Porjesz, J. Nurnberger, R. Crowe, H. Begleiter

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The Collaborative Study on the Genetics of Alcoholism (COGA) is a six-center program to detect and map genes that increase or decrease susceptibility to develop alcohol dependence and related phenotypes. A genome wide screen examined 291 markers in 987 individuals from 105 families at an average interval of 13.8 cM. Multipoint nonparametric linkage analysis provided suggestive evidence for linkage with susceptibility loci for broadly defined alcohol dependence on chromosomes 1, 2, and 7. Using a narrowly defined severe alcohol dependence phenotype, suggestive evidence for linkage on chromosomes 8 and 16 was found. There was also suggestive evidence for linkage with a protective locus on chromosome 4, for which protective effects have been reported in Asian populations. Replication of these results is being undertaken by (1) dense mapping of hot spots identified in the initial screen and by (2) mapping regions of interest in a large replication sample. The replication sample, currently being genotyped, includes 157 families with 1,319 members. Preliminary results from dense mapping studies of the initial sample suggest continued evidence for linkage on chromosomes 4 and 16. These findings and more detailed results of dense mapping on the initial sample and preliminary linkage results from the replication sample will be presented.

Original languageEnglish
Pages (from-to)478-479
Number of pages2
JournalAmerican Journal of Medical Genetics, Part B: Neuropsychiatric Genetics
Issue number6
StatePublished - 6 Nov 1998
Externally publishedYes


Dive into the research topics of 'Replicating genetic linkage in the collaborative study on the genetics of alcoholism (COGA)'. Together they form a unique fingerprint.

Cite this