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Bird evolution: testing the Metaves clade with six new mitochondrial genomes

Morgan-Richards, Mary; Trewick, Steve A; Bartosch-Härlid, Anna LU ; Kardailsky, Olga; Phillips, Matthew J; McLenachan, Patricia A and Penny, David (2008) In BMC Evolutionary Biology 8(20).
Abstract
Background: Evolutionary biologists are often misled by convergence of morphology and this has been common in the study of bird evolution. However, the use of molecular data sets have their own problems and phylogenies based on short DNA sequences have the potential to mislead us too. The relationships among clades and timing of the evolution of modern birds (Neoaves) has not yet been well resolved. Evidence of convergence of morphology remain controversial. With six new bird mitochondrial genomes (hummingbird, swift, kagu, rail, flamingo and grebe) we test the proposed Metaves/Coronaves division within Neoaves and the parallel radiations in this primary avian clade. Results: Our mitochondrial trees did not return the Metaves clade that... (More)
Background: Evolutionary biologists are often misled by convergence of morphology and this has been common in the study of bird evolution. However, the use of molecular data sets have their own problems and phylogenies based on short DNA sequences have the potential to mislead us too. The relationships among clades and timing of the evolution of modern birds (Neoaves) has not yet been well resolved. Evidence of convergence of morphology remain controversial. With six new bird mitochondrial genomes (hummingbird, swift, kagu, rail, flamingo and grebe) we test the proposed Metaves/Coronaves division within Neoaves and the parallel radiations in this primary avian clade. Results: Our mitochondrial trees did not return the Metaves clade that had been proposed based on one nuclear intron sequence. We suggest that the high number of indels within the seventh intron of the beta-fibrinogen gene at this phylogenetic level, which left a dataset with not a single site across the alignment shared by all taxa, resulted in artifacts during analysis. With respect to the overall avian tree, we find the flamingo and grebe are sister taxa and basal to the shorebirds (Charadriiformes). Using a novel site-stripping technique for noise-reduction we found this relationship to be stable. The hummingbird/swift clade is outside the large and very diverse group of raptors, shore and sea birds. Unexpectedly the kagu is not closely related to the rail in our analysis, but because neither the kagu nor the rail have close affinity to any taxa within this dataset of 41 birds, their placement is not yet resolved. Conclusion: Our phylogenetic hypothesis based on 41 avian mitochondrial genomes ( 13,229 bp) rejects monophyly of seven Metaves species and we therefore conclude that the members of Metaves do not share a common evolutionary history within the Neoaves. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
BMC Evolutionary Biology
volume
8
issue
20
publisher
BioMed Central
external identifiers
  • wos:000254052700003
  • scopus:40949166237
ISSN
1471-2148
DOI
10.1186/1471-2148-8-20
language
English
LU publication?
yes
id
4ed030c6-2301-40cf-bcdd-c365d8b3715b (old id 1191550)
date added to LUP
2008-09-08 17:06:49
date last changed
2017-11-05 04:13:35
@article{4ed030c6-2301-40cf-bcdd-c365d8b3715b,
  abstract     = {Background: Evolutionary biologists are often misled by convergence of morphology and this has been common in the study of bird evolution. However, the use of molecular data sets have their own problems and phylogenies based on short DNA sequences have the potential to mislead us too. The relationships among clades and timing of the evolution of modern birds (Neoaves) has not yet been well resolved. Evidence of convergence of morphology remain controversial. With six new bird mitochondrial genomes (hummingbird, swift, kagu, rail, flamingo and grebe) we test the proposed Metaves/Coronaves division within Neoaves and the parallel radiations in this primary avian clade. Results: Our mitochondrial trees did not return the Metaves clade that had been proposed based on one nuclear intron sequence. We suggest that the high number of indels within the seventh intron of the beta-fibrinogen gene at this phylogenetic level, which left a dataset with not a single site across the alignment shared by all taxa, resulted in artifacts during analysis. With respect to the overall avian tree, we find the flamingo and grebe are sister taxa and basal to the shorebirds (Charadriiformes). Using a novel site-stripping technique for noise-reduction we found this relationship to be stable. The hummingbird/swift clade is outside the large and very diverse group of raptors, shore and sea birds. Unexpectedly the kagu is not closely related to the rail in our analysis, but because neither the kagu nor the rail have close affinity to any taxa within this dataset of 41 birds, their placement is not yet resolved. Conclusion: Our phylogenetic hypothesis based on 41 avian mitochondrial genomes ( 13,229 bp) rejects monophyly of seven Metaves species and we therefore conclude that the members of Metaves do not share a common evolutionary history within the Neoaves.},
  author       = {Morgan-Richards, Mary and Trewick, Steve A and Bartosch-Härlid, Anna and Kardailsky, Olga and Phillips, Matthew J and McLenachan, Patricia A and Penny, David},
  issn         = {1471-2148},
  language     = {eng},
  number       = {20},
  publisher    = {BioMed Central},
  series       = {BMC Evolutionary Biology},
  title        = {Bird evolution: testing the Metaves clade with six new mitochondrial genomes},
  url          = {http://dx.doi.org/10.1186/1471-2148-8-20},
  volume       = {8},
  year         = {2008},
}