DESCRIPTION:

Rats in separate cage with free choice of water or 10% (v/v) of ethanol; consumption scores (grams/kg/day) were averaged; the amounts of ethanol consumed every 3 days over three weeks. Additive QTL. LOD 2.9 Peak Marker: D16Mit2 spans 1-26804456. Strains were HAD1, LAD1.

LABEL:

QTL-Alc7-Rat-Chr 16

SCORE TYPE:

Binary

DATE ADDED:

2011-06-30

DATE UPDATED:

2020-05-06

SPECIES:

AUTHORS:

Foroud T, Bice P, Castelluccio P, Bo R, Miller L, Ritchotte A, Lumeng L, Li TK, Carr LG

TITLE:

Identification of quantitative trait loci influencing alcohol consumption in the high alcohol drinking and low alcohol drinking rat lines.

JOURNAL:

Behavior genetics Mar 2000, Vol 30, pp. 131-40

ABSTRACT:

Selective breeding has been employed to develop high-alcohol-drinking (HAD) and low-alcohol-drinking (LAD) rat lines from the heterogeneous N/Nih rat. Within-family selection and a rotational breeding design were used to discourage inbreeding (Li et al, 1993). To identify quantitative trait loci (QTLs) contributing to alcohol consumption, reciprocal HAD and LAD matings in conjunction with F1 intercrosses were used to create 459 F2 progeny. Using selective genotyping of 151 F2 progeny with extreme alcohol consumption scores and a novel least squares method developed by Haley et al (1994), five chromosomal regions (1, 5, 10, 12, and 16) were identified with lod scores greater than 2.0. Genotyping of the entire sample of 459 F2 progeny produced maximum lod scores of 3.5 on chromosome 5, 2.4 on chromosome 10, 4.7 on chromosome 12 and 2.9 on chromosome 16. The evidence of linkage to chromosome 1 diminished substantially to a maximum lod score of 0.5 when all F2 progeny were genotyped. This study is the first genome-wide study for QTLs underlying alcohol consumption that has employed noninbred lines. Further localization of these QTLs will likely provide insight and candidate genes for the study of human alcoholism. PUBMED: 10979603
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