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- Publications
- Influence
Phylogeny and biogeography of dabbling ducks (genus: Anas): A comparison of molecular and morphological evidence
- K. Johnson, M. Sorenson
- Biology
- 1 July 1999
We constructed a phylogeny for the dabbling ducks (tribe Anatini) based on cytochrome-b and ND2 mitochondrial gene DNA sequences. This phylogeny differed in several important respects from a… Expand
The population genetics of host specificity: genetic differentiation in dove lice (Insecta: Phthiraptera)
- K. Johnson, B. L. Williams, Devin M Drown, R. J. Adams, D. Clayton
- Biology, Medicine
- Molecular ecology
- 1 January 2002
Some species of parasites occur on a wide range of hosts while others are restricted to one or a few host species. The host specificity of a parasite species is determined, in part, by its ability to… Expand
When do parasites fail to speciate in response to host speciation?
- K. Johnson, R. J. Adams, R. D. Page, D. Clayton
- Biology, Medicine
- Systematic biology
- 1 February 2003
Cospeciation generally increases the similarity between host and parasite phylogenies. Incongruence between host and parasite phylogenies has previously been explained in terms of host switching,… Expand
Aligned 18S for Zoraptera (Insecta): phylogenetic position and molecular evolution.
- K. Yoshizawa, K. Johnson
- Biology, Medicine
- Molecular phylogenetics and evolution
- 1 November 2005
The order Zoraptera (angel insects) is one of the least known insect groups, containing only 32 extant species. The phylogenetic position of Zoraptera is poorly understood, but it is generally… Expand
Ecology of congruence: past meets present.
- D. Clayton, S. Bush, K. Johnson
- Biology, Medicine
- Systematic biology
- 1 February 2004
Phylogenetic congruence is governed by various macroevolutionary events, including cospeciation, host switching, sorting, duplication, and failure to speciate. The relative frequency of these events… Expand
Comparing molecular evolution in two mitochondrial protein coding genes (cytochrome b and ND2) in the dabbling ducks (Tribe: Anatini).
- K. Johnson, M. Sorenson
- Biology, Medicine
- Molecular phylogenetics and evolution
- 1 August 1998
Rates of sequence evolution were estimated for the cytochrome b (cyt b) and NADH dehydrogenase sub-unit 2 (ND2) genes using a phylogeny of the dabbling ducks (Tribe: Anatini) and outgroups. This… Expand
Nuclear and mitochondrial genes contain similar phylogenetic signal for pigeons and doves (Aves: Columbiformes).
- K. Johnson, D. Clayton
- Biology, Medicine
- Molecular phylogenetics and evolution
- 2000
Molecular systematic studies generally assume that gene trees are reasonable estimates of species trees. We tested the validity of this assumption in the pigeons and doves (Aves: Columbiformes) by… Expand
The phylogeny of the louse genus Brueelia does not reflect host phylogeny
- K. Johnson, R. J. Adams, D. Clayton
- Biology
- 1 October 2002
Lice (Insecta: Phthiraptera) are often considered a model group of parasites for studies of cospeciation because of their high host specificity, and louse species in the genus Brueelia are relatively… Expand
The evolution of echolocation in swiftlets
- J. J. Price, K. Johnson, D. Clayton
- Biology
- 1 March 2004
143.The abilities of some cave-nesting swiftlets to echolocate has traditionally been used toseparate the genus Aerodramus, which includes echolocating species, from the genusCollocalia, thought to… Expand
Dramatically elevated rate of mitochondrial substitution in lice (Insecta: Phthiraptera).
- K. Johnson, R. Cruickshank, R. J. Adams, V. Smith, R. D. Page, D. Clayton
- Biology, Medicine
- Molecular phylogenetics and evolution
- 1 February 2003
Few estimates of relative substitution rates, and the underlying mutation rates, exist between mitochondrial and nuclear genes in insects. Previous estimates for insects indicate a 2-9 times faster… Expand