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Article
Mammalian Evolution and the Interphotoreceptor Retinoid Binding Protein (IRBP) Gene: Convincing Evidence for Several Superordinal Clades
Journal of Molecular Evolution
  • Michael Stanhope, Queen's University - Belfast, United Kingdom
  • Marta R. Smith, Nova Southeastern University
  • Victor G. Waddell, Queen's University - Belfast, United Kingdom
  • Calvin A. Porter, Wayne State University
  • Mahmood S. Shivji, Nova Southeastern University
  • Morris Goodman, Wayne State University
Document Type
Article
Publication Date
8-1-1996
Keywords
  • Mammalian phylogenetics,
  • Interordinal relationships,
  • IRBP,
  • Cetaceans,
  • Elephant shrew,
  • Aardvark
Peer Reviewed
1
Abstract
Phylogenetic relationships of 25 mammalian species representing 17 of the 18 eutherian orders were examined using DNA sequences from a 1.2-kb region of the 5′ end of exon 1 of the single-copy nuclear gene known as interphotoreceptor retinoid binding protein (IRBP). A wide variety of methods of analysis of the DNA sequence, and of the translated products, all supported a five-order clade consisting of elephant shrew (Macroscelidea)/aardvark (Tubulidentata)/and the paenungulates (hyracoids, sirenians, and elephants), with bootstrap support in all cases of 100%. The Paenungulata was also strongly supported by these IRBP data. In the majority of analyses this monophyletic five-order grouping was the first branch off the tree after the Edentata. These results are highly congruent with two other recent sources of molecular data. Another superordinal grouping, with similar 100% bootstrap support in all of the same wide-ranging types of analyses, was Artiodactyla/Cetacea. Other superordinal affinities, suggested by the analyses, but with less convincing support, included a Perissodactyla/Artiodactyla/Cetacea clade, an Insectivora/Chiroptera clade, and Glires (an association of rodents and lagomorphs).
Comments

©Springer-Verlag New York Inc 1996

ResearcherID
G-4080-2013
DOI
10.1007/BF02337352
Citation Information
Michael Stanhope, Marta R. Smith, Victor G. Waddell, Calvin A. Porter, et al.. "Mammalian Evolution and the Interphotoreceptor Retinoid Binding Protein (IRBP) Gene: Convincing Evidence for Several Superordinal Clades" Journal of Molecular Evolution Vol. 43 Iss. 2 (1996) p. 83 - 92 ISSN: 1432-1432
Available at: http://works.bepress.com/mahmood-shivji/74/