Journal article
Genomic analyses identify multiple Asian origins and deeply diverged mitochondrial clades in inbred brown rats (Rattus norvegicus)
Evolutionary applications, v 11(5), pp 718-726
Jun 2018
PMID: 29875813
Featured in Collection : UN Sustainable Development Goals @ Drexel
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 geographic origin for the strains studied and showed admixed ancestral variation with wild rats in eastern Asia and western North America. The Sprague Dawley derived, Wistar derived, and Brown Norway strains each had mitogenomes from different clades which diverged between 13 and 139 kya. Thus, we posit that rats originally collected for captive breeding had high mitochondrial diversity that became fixed through genetic drift and/or artificial selection. Our results show that these important medical models share common genomic ancestry from a few source populations, and opportunities exist to create new strains with diverse genomic backgrounds to provide novel insight into the genomic basis of disease phenotypes.
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Details
- Title
- Genomic analyses identify multiple Asian origins and deeply diverged mitochondrial clades in inbred brown rats (Rattus norvegicus)
- Creators
- Emily E. Puckett - Fordham UniversityOlivia Micci-Smith - Fordham UniversityJason Munshi-South - Fordham University
- Publication Details
- Evolutionary applications, v 11(5), pp 718-726
- Publisher
- Wiley
- Number of pages
- 9
- Grant note
- 1457523 / Directorate for Biological Sciences; National Science Foundation (NSF); NSF - Directorate for Biological Sciences (BIO) Fordham College at Rose Hill Summer Undergraduate Research 1531639 / Div Of Biological Infrastructure; National Science Foundation (NSF); NSF - Directorate for Biological Sciences (BIO) National Science Foundation; National Science Foundation (NSF) Calder Summer Undergraduate Research Program
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES)
- Web of Science ID
- WOS:000433572400011
- Scopus ID
- 2-s2.0-85047871815
- Other Identifier
- 991021903954604721
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- Web of Science research areas
- Evolutionary Biology