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. 1999 Feb 7;266(1416):305. doi: 10.1098/rspb.1999.0638

Analyses of mitochondrial DNA nest ratite birds within the Neognathae: supporting a neotenous origin of ratite morphological characters

A H arlid, U Arnason
PMCID: PMC1689674

Abstract

It is commonly acknowledged that the basal divergence among extant birds is between Palaeognathae and Neognathae. However, recent analyses of mitochondrial sequences have challenged that notion. In order to investigate this fundamental phylogenetic question, the complete mitochondrial DNA (mtDNA) molecule of the rook Corvus frugilegus (Passeriformes) was sequenced and included in phylogenetic analyses with the previously reported complete mtDNAs of the chicken Gallus gallus (Galliformes) and two ratite species, the ostrich Struthio camelus and the rhea Rhea americana (Struthioniformes). The analyses reconstructed a split between Passeriformes and a branch including Galliformes and Struthioniformes. Thus, the result is inconsistent with the traditional understanding of a basal avian divergence between Palaeognathae and Neognathae. The findings suggest that the morphological characteristics of the ratites are secondarily acquired, probably through neoteny and that the ratites are descendants of flying, neognathous ancestors.

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Selected References

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  1. Adachi J., Hasegawa M. Model of amino acid substitution in proteins encoded by mitochondrial DNA. J Mol Evol. 1996 Apr;42(4):459–468. doi: 10.1007/BF02498640. [DOI] [PubMed] [Google Scholar]
  2. Anderson S., de Bruijn M. H., Coulson A. R., Eperon I. C., Sanger F., Young I. G. Complete sequence of bovine mitochondrial DNA. Conserved features of the mammalian mitochondrial genome. J Mol Biol. 1982 Apr 25;156(4):683–717. doi: 10.1016/0022-2836(82)90137-1. [DOI] [PubMed] [Google Scholar]
  3. Arnason U., Gullberg A., Widegren B. The complete nucleotide sequence of the mitochondrial DNA of the fin whale, Balaenoptera physalus. J Mol Evol. 1991 Dec;33(6):556–568. doi: 10.1007/BF02102808. [DOI] [PubMed] [Google Scholar]
  4. Arnason U., Johnsson E. The complete mitochondrial DNA sequence of the harbor seal, Phoca vitulina. J Mol Evol. 1992 Jun;34(6):493–505. doi: 10.1007/BF00160463. [DOI] [PubMed] [Google Scholar]
  5. Benton M. J. Phylogeny of the major tetrapod groups: morphological data and divergence dates. J Mol Evol. 1990 May;30(5):409–424. doi: 10.1007/BF02101113. [DOI] [PubMed] [Google Scholar]
  6. Bibb M. J., Van Etten R. A., Wright C. T., Walberg M. W., Clayton D. A. Sequence and gene organization of mouse mitochondrial DNA. Cell. 1981 Oct;26(2 Pt 2):167–180. doi: 10.1016/0092-8674(81)90300-7. [DOI] [PubMed] [Google Scholar]
  7. Cao Y., Adachi J., Janke A., Päbo S., Hasegawa M. Phylogenetic relationships among eutherian orders estimated from inferred sequences of mitochondrial proteins: instability of a tree based on a single gene. J Mol Evol. 1994 Nov;39(5):519–527. doi: 10.1007/BF00173421. [DOI] [PubMed] [Google Scholar]
  8. Caspers G. J., Uit de Weerd D., Wattel J., de Jong W. W. alpha-Crystallin sequences support a galliform/anseriform clade. Mol Phylogenet Evol. 1997 Apr;7(2):185–188. doi: 10.1006/mpev.1996.0384. [DOI] [PubMed] [Google Scholar]
  9. Chang Y. S., Huang F. L., Lo T. B. The complete nucleotide sequence and gene organization of carp (Cyprinus carpio) mitochondrial genome. J Mol Evol. 1994 Feb;38(2):138–155. doi: 10.1007/BF00166161. [DOI] [PubMed] [Google Scholar]
  10. Cooper A., Penny D. Mass survival of birds across the Cretaceous-Tertiary boundary: molecular evidence. Science. 1997 Feb 21;275(5303):1109–1113. doi: 10.1126/science.275.5303.1109. [DOI] [PubMed] [Google Scholar]
  11. Dawson A., Deeming D. C., Dick A. C., Sharp P. J. Plasma thyroxine concentrations in farmed ostriches in relation to age, body weight, and growth hormone. Gen Comp Endocrinol. 1996 Sep;103(3):308–315. doi: 10.1006/gcen.1996.0126. [DOI] [PubMed] [Google Scholar]
  12. Desjardins P., Morais R. Sequence and gene organization of the chicken mitochondrial genome. A novel gene order in higher vertebrates. J Mol Biol. 1990 Apr 20;212(4):599–634. doi: 10.1016/0022-2836(90)90225-B. [DOI] [PubMed] [Google Scholar]
  13. Härlid A., Janke A., Arnason U. The complete mitochondrial genome of Rhea americana and early avian divergences. J Mol Evol. 1998 Jun;46(6):669–679. doi: 10.1007/pl00006347. [DOI] [PubMed] [Google Scholar]
  14. Härlid A., Janke A., Arnason U. The mtDNA sequence of the ostrich and the divergence between paleognathous and neognathous birds. Mol Biol Evol. 1997 Jul;14(7):754–761. doi: 10.1093/oxfordjournals.molbev.a025815. [DOI] [PubMed] [Google Scholar]
  15. Janke A., Arnason U. The complete mitochondrial genome of Alligator mississippiensis and the separation between recent archosauria (birds and crocodiles). Mol Biol Evol. 1997 Dec;14(12):1266–1272. doi: 10.1093/oxfordjournals.molbev.a025736. [DOI] [PubMed] [Google Scholar]
  16. Janke A., Xu X., Arnason U. The complete mitochondrial genome of the wallaroo (Macropus robustus) and the phylogenetic relationship among Monotremata, Marsupialia, and Eutheria. Proc Natl Acad Sci U S A. 1997 Feb 18;94(4):1276–1281. doi: 10.1073/pnas.94.4.1276. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Kishino H., Hasegawa M. Evaluation of the maximum likelihood estimate of the evolutionary tree topologies from DNA sequence data, and the branching order in hominoidea. J Mol Evol. 1989 Aug;29(2):170–179. doi: 10.1007/BF02100115. [DOI] [PubMed] [Google Scholar]
  18. Sarich V. M., Wilson A. C. Generation time and genomic evolution in primates. Science. 1973 Mar 16;179(4078):1144–1147. doi: 10.1126/science.179.4078.1144. [DOI] [PubMed] [Google Scholar]
  19. Stapel S. O., Leunissen J. A., Versteeg M., Wattel J., de Jong W. W. Ratites as oldest offshoot of avian stem--evidence from alpha-crystallin A sequences. Nature. 1984 Sep 20;311(5983):257–259. doi: 10.1038/311257a0. [DOI] [PubMed] [Google Scholar]
  20. Tamura K., Nei M. Estimation of the number of nucleotide substitutions in the control region of mitochondrial DNA in humans and chimpanzees. Mol Biol Evol. 1993 May;10(3):512–526. doi: 10.1093/oxfordjournals.molbev.a040023. [DOI] [PubMed] [Google Scholar]
  21. Tzeng C. S., Hui C. F., Shen S. C., Huang P. C. The complete nucleotide sequence of the Crossostoma lacustre mitochondrial genome: conservation and variations among vertebrates. Nucleic Acids Res. 1992 Sep 25;20(18):4853–4858. doi: 10.1093/nar/20.18.4853. [DOI] [PMC free article] [PubMed] [Google Scholar]

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