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Confirmation of alcohol preference quantitative trait loci in the replicate high alcohol drinking and low alcohol drinking rat lines. 2003

Tatiana Foroud, and Aimee Ritchotte, and John Spence, and Lixiang Liu, and Lawrence Lumeng, and Ting-Kai Li, and Lucinda G Carr
Department of Medical and Molecular Genetics, Indiana University School of Medicine, 975 West Walnut Street (IB-155), Indianapolis, IN 46202, USA. tforoud@iupui.edu

OBJECTIVE Selective breeding has been employed to develop replicate high-alcohol-drinking (HAD1 and HAD2) and low-alcohol-drinking (LAD1 and LAD2) 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). A genome screen was previously performed using 459 HAD1xLAD1 F2 progeny to identify quantitative trait loci (QTLs) on rat chromosomes 5, 10, 12 and 16 that contribute to alcohol preference and consumption in these non-inbred rat models of alcoholism. METHODS To confirm these QTLs in the replicate lines, 16 HAD2 and 16 LAD2 rats were genotyped for microsatellite markers within each of these QTL intervals. RESULTS Review of the genotypic data support confirmation of the QTLs on chromosomes 5 and 10; several markers in the QTL region display different alleles in the HAD2 and LAD2 rats, suggesting linkage disequilibrium between the microsatellite markers and the QTL. Although the QTL on chromosome 12 had the highest LOD score in the HAD1 and LAD1 studies, little evidence supported confirmation of this QTL based on the genotyped markers. CONCLUSIONS Further evaluation of each of these QTL regions is ongoing in a sample of HAD2xLAD2 F2 progeny currently being generated that will be used to assess the evidence of linkage in each of these QTL regions.

UI MeSH Term Description Entries
D008126 Lod Score The total relative probability, expressed on a logarithmic scale, that a linkage relationship exists among selected loci. Lod is an acronym for "logarithmic odds." Lod Scores,Score, Lod,Scores, Lod
D011919 Rats, Inbred Strains Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding. August Rats,Inbred Rat Strains,Inbred Strain of Rat,Inbred Strain of Rats,Inbred Strains of Rats,Rat, Inbred Strain,August Rat,Inbred Rat Strain,Inbred Strain Rat,Inbred Strain Rats,Inbred Strains Rat,Inbred Strains Rats,Rat Inbred Strain,Rat Inbred Strains,Rat Strain, Inbred,Rat Strains, Inbred,Rat, August,Rat, Inbred Strains,Rats Inbred Strain,Rats Inbred Strains,Rats, August,Rats, Inbred Strain,Strain Rat, Inbred,Strain Rats, Inbred,Strain, Inbred Rat,Strains, Inbred Rat
D001947 Breeding The production of offspring by selective mating or HYBRIDIZATION, GENETIC in animals or plants. Breedings
D002874 Chromosome Mapping Any method used for determining the location of and relative distances between genes on a chromosome. Gene Mapping,Linkage Mapping,Genome Mapping,Chromosome Mappings,Gene Mappings,Genome Mappings,Linkage Mappings,Mapping, Chromosome,Mapping, Gene,Mapping, Genome,Mapping, Linkage,Mappings, Chromosome,Mappings, Gene,Mappings, Genome,Mappings, Linkage
D000428 Alcohol Drinking Behaviors associated with the ingesting of ALCOHOLIC BEVERAGES, including social drinking. Alcohol Consumption,Alcohol Intake,Drinking, Alcohol,Alcohol Drinking Habits,Alcohol Drinking Habit,Alcohol Intakes,Consumption, Alcohol,Drinking Habit, Alcohol,Habit, Alcohol Drinking,Habits, Alcohol Drinking,Intake, Alcohol
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013045 Species Specificity The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species. Species Specificities,Specificities, Species,Specificity, Species
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus
D040641 Quantitative Trait Loci Genetic loci associated with a quantitative trait. Quantitative Trait Loci Genes,Loci, Quantitative Trait,Locus, Quantitative Trait,Quantitative Trait Locus,Trait Loci, Quantitative,Trait Locus, Quantitative

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