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Genomic evidence of speciation reversal in ravens.
Nat Commun. 2018 03 02; 9(1):906.NC

Abstract

Many species, including humans, have emerged via complex reticulate processes involving hybridisation. Under certain circumstances, hybridisation can cause distinct lineages to collapse into a single lineage with an admixed mosaic genome. Most known cases of such 'speciation reversal' or 'lineage fusion' involve recently diverged lineages and anthropogenic perturbation. Here, we show that in western North America, Common Ravens (Corvus corax) have admixed mosaic genomes formed by the fusion of non-sister lineages ('California' and 'Holarctic') that diverged ~1.5 million years ago. Phylogenomic analyses and concordant patterns of geographic structuring in mtDNA, genome-wide SNPs and nuclear introns demonstrate long-term admixture and random interbreeding between the non-sister lineages. In contrast, our genomic data support reproductive isolation between Common Ravens and Chihuahuan Ravens (C. cryptoleucus) despite extensive geographic overlap and a sister relationship between Chihuahuan Ravens and the California lineage. These data suggest that the Common Raven genome was formed by secondary lineage fusion and most likely represents a case of ancient speciation reversal that occurred without anthropogenic causes.

Authors+Show Affiliations

Natural History Museum, University of Oslo, P.O. Box 1172 Blindern, 0318, Oslo, Norway. kearnsa@si.edu. Department of Biological Sciences, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD, 21250, USA. kearnsa@si.edu. Center for Conservation Genomics, Smithsonian Conservation Biology Institute, National Zoological Park, Washington, 20013-7012, DC, USA. kearnsa@si.edu.Department of Biological Sciences, St. Cloud State University, 720 Fourth Avenue, St. Cloud, MN, 56301-4498, USA.Cowan Tetrapod Collection, Beaty Biodiversity Museum, University of British Columbia, 2212 Main Mall, Vancouver, BC, V6T 1Z4, Canada.Natural History Museum, University of Oslo, P.O. Box 1172 Blindern, 0318, Oslo, Norway.Department of Biological Sciences, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD, 21250, USA.Department of Biological Sciences, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD, 21250, USA.School of Environmental and Forest Sciences, University of Washington, Box 352100, Seattle, WA, 98195, USA.Center for Conservation Genomics, Smithsonian Conservation Biology Institute, National Zoological Park, Washington, 20013-7012, DC, USA.Natural History Museum, University of Oslo, P.O. Box 1172 Blindern, 0318, Oslo, Norway.Department of Biological Sciences, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD, 21250, USA.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

29500409

Citation

Kearns, Anna M., et al. "Genomic Evidence of Speciation Reversal in Ravens." Nature Communications, vol. 9, no. 1, 2018, p. 906.
Kearns AM, Restani M, Szabo I, et al. Genomic evidence of speciation reversal in ravens. Nat Commun. 2018;9(1):906.
Kearns, A. M., Restani, M., Szabo, I., Schrøder-Nielsen, A., Kim, J. A., Richardson, H. M., Marzluff, J. M., Fleischer, R. C., Johnsen, A., & Omland, K. E. (2018). Genomic evidence of speciation reversal in ravens. Nature Communications, 9(1), 906. https://doi.org/10.1038/s41467-018-03294-w
Kearns AM, et al. Genomic Evidence of Speciation Reversal in Ravens. Nat Commun. 2018 03 2;9(1):906. PubMed PMID: 29500409.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Genomic evidence of speciation reversal in ravens. AU - Kearns,Anna M, AU - Restani,Marco, AU - Szabo,Ildiko, AU - Schrøder-Nielsen,Audun, AU - Kim,Jin Ah, AU - Richardson,Hayley M, AU - Marzluff,John M, AU - Fleischer,Robert C, AU - Johnsen,Arild, AU - Omland,Kevin E, Y1 - 2018/03/02/ PY - 2016/11/04/received PY - 2018/02/01/accepted PY - 2018/3/4/entrez PY - 2018/3/4/pubmed PY - 2018/4/10/medline SP - 906 EP - 906 JF - Nature communications JO - Nat Commun VL - 9 IS - 1 N2 - Many species, including humans, have emerged via complex reticulate processes involving hybridisation. Under certain circumstances, hybridisation can cause distinct lineages to collapse into a single lineage with an admixed mosaic genome. Most known cases of such 'speciation reversal' or 'lineage fusion' involve recently diverged lineages and anthropogenic perturbation. Here, we show that in western North America, Common Ravens (Corvus corax) have admixed mosaic genomes formed by the fusion of non-sister lineages ('California' and 'Holarctic') that diverged ~1.5 million years ago. Phylogenomic analyses and concordant patterns of geographic structuring in mtDNA, genome-wide SNPs and nuclear introns demonstrate long-term admixture and random interbreeding between the non-sister lineages. In contrast, our genomic data support reproductive isolation between Common Ravens and Chihuahuan Ravens (C. cryptoleucus) despite extensive geographic overlap and a sister relationship between Chihuahuan Ravens and the California lineage. These data suggest that the Common Raven genome was formed by secondary lineage fusion and most likely represents a case of ancient speciation reversal that occurred without anthropogenic causes. SN - 2041-1723 UR - https://www.unboundmedicine.com/medline/citation/29500409/Genomic_evidence_of_speciation_reversal_in_ravens_ L2 - http://dx.doi.org/10.1038/s41467-018-03294-w DB - PRIME DP - Unbound Medicine ER -