Ancient and modern genomes unravel the evolutionary history of the rhinoceros family

Shanlin Liu*, Michael V. Westbury, Nicolas Dussex, Kieren J. Mitchell, Mikkel Holger S. Sinding, Peter D. Heintzman, David A. Duchêne, Joshua D. Kapp, Johanna von Seth, Holly Heiniger, Fátima Sánchez-Barreiro, Ashot Margaryan, Remi André-Olsen, Binia De Cahsan, Guanliang Meng, Chentao Yang, Lei Chen, Tom van der Valk, Yoshan Moodley, Kees RookmaakerMichael W. Bruford, Oliver Ryder, Cynthia Steiner, Linda G. R. Bruins-van Sonsbeek, Sergey Vartanyan, Chunxue Guo, Alan Cooper, Pavel Kosintsev, Irina Kirillova, Adrian M. Lister, Tomas Marques-Bonet, Shyam Gopalakrishnan, Robert R. Dunn, Eline D. Lorenzen, Beth Shapiro, Guojie Zhang, Pierre Olivier Antoine, Love Dalén, M. Thomas P. Gilbert

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Only five species of the once-diverse Rhinocerotidae remain, making the reconstruction of their evolutionary history a challenge to biologists since Darwin. We sequenced genomes from five rhinoceros species (three extinct and two living), which we compared to existing data from the remaining three living species and a range of outgroups. We identify an early divergence between extant African and Eurasian lineages, resolving a key debate regarding the phylogeny of extant rhinoceroses. This early Miocene (∼16 million years ago [mya]) split post-dates the land bridge formation between the Afro-Arabian and Eurasian landmasses. Our analyses also show that while rhinoceros genomes in general exhibit low levels of genome-wide diversity, heterozygosity is lowest and inbreeding is highest in the modern species. These results suggest that while low genetic diversity is a long-term feature of the family, it has been particularly exacerbated recently, likely reflecting recent anthropogenic-driven population declines.

Original languageEnglish
JournalCell
Volume184
Issue number19
Pages (from-to)4874-4885.e16
ISSN0092-8674
DOIs
Publication statusPublished - 2021

Bibliographical note

Publisher Copyright:
© 2021 The Authors

Keywords

  • Rhinoceros, Perissodactyl, Conservation genomics, Phylogenomics, Genomic diversity

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