We analyzed the GAW11 data on alcoholism provided by the Collaborative Stud
y on the Genetics of Alcoholism (COGA) using an extension of a new test of
linkage and association for quantitative traits developed by George et al.
[1999]. This method determines linkage between marker loci and quantitative
traits, when allelic association is present between the trait and marker l
oci, by regressing the disease trait on the parental transmission of the al
lele of interest. We found no strong evidence of linkage to any markers. Ho
wever, we found several markers suggestive of possible linkage that may des
erve further investigation. (C) 1999 Wiley-Liss, Inc.