Genomic analyses identify multiple Asian origins and deeply diverged mitochondrial clades in inbred brown rats (Rattus norvegicus).

ABSTRACT: Over 500 strains of inbred brown rats (Rattus norvegicus) have been developed for use as a biomedical model organism. Most of these inbred lines were derived from the colony established at the Wistar Institute in 1906 or its descendants following worldwide distribution to research and breeding centers. The geographic source of the animals that founded the Wistar colony has been lost to history; thus, we compared 25 inbred rat strains to 326 wild rats from a global diversity dataset at 32 k SNPs, and 47 mitochondrial genomes to identify the source populations. We analyzed nuclear genomic data using principal component analyses and co-ancestry heat maps, and mitogenomes using phylogenetic trees and networks. In the nuclear genome, inbred rats clustered together indicating a single geo

SUBMITTER: Puckett EE 

PROVIDER: S-EPMC5979757 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature