Agouti Signaling ProteinHair ColorReceptors, MelanocortinGenetic LociReceptors, CorticotropinPigmentationAgouti-Related ProteinIntercellular Signaling Peptides and ProteinsQuantitative Trait LociReceptor, Melanocortin, Type 1Chromosome Mappingalpha-MSHGenetic LinkageMelaninsPhenotypeMolecular Sequence DataProteinsCrosses, GeneticGenes, Intracisternal A-ParticleBase SequenceMelanocyte-Stimulating HormonesMutationRats, Inbred LECGenotypeGenetic MarkersSkin PigmentationRodentia