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COSPECIATION BETWEEN BACTERIAL ENDOSYMBIONTS (BUCHNERA) AND A RECENT RADIATION OF APHIDS (UROLEUCON) AND PITFALLS OF TESTING FOR PHYLOGENETIC CONGRUENCE
Abstract
Previous studies of phylogenetic congruence between aphids and their symbiotic bacteria (Buchnera) supported long-term vertical transmission of symbionts. However, those studies were based on distantly related aphids and would not have revealed horizontal transfer of symbionts among closely related hosts. Aphid species of the genus Uroleucon are closely related phylogenetically and overlap in geographic ranges, habitats, and parasitoids. To examine support for congruence of phylogenies of Buchnera and Uroleucon, sequences from four mitochondrial, one nuclear, and one endosymbiont gene (trpB) were obtained. Congruence of phylogenies based on pooled aphid genes with phylogenies based on trpB was highly significant: Most nodes resolved by trpB corresponded to nodes resolved by the pooled aphid genes. Furthermore, no nodes were both inconsistent between the trees and strongly supported in both trees. Two kinds of analyses testing the null hypothesis of perfect congruence between pairwise combinations of datasets and tree topologies were performed: the Kishino-Hasegawa test and the likelihood-ratio test. Both tests indicated significant disagreement among most pairwise combinations of mitochondrial, nuclear, and symbiont datasets. Because rampant recombination among mitochondrial genomes of different aphid species is unlikely, inaccurate assumptions in the evolutionary models underlying these tests appear to be causing the hypothesis of a shared history to be incorrectly rejected. Moreover, trpB was more consistent with the aphid genes as a set than any single aphid gene was with the others, suggesting that the symbionts show the same phylogeny as the aphids. Overall, analyses support the interpretation that symbionts and aphids have undergone strict cospeciation, with no horizontal transmission of symbionts even among closely related, ecologically similar aphid hosts.
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Citations
Cites
Statistical tests of models of DNA substitution
Goldman, N. (1993) · Journal of Molecular Evolution · doi:10.1007/bf00166252 · Cited by 736
Cited by
BIOLOGY OF BACTERIOCYTE-ASSOCIATED ENDOSYMBIONTS OF PLANT SAP-SUCKING INSECTS
Baumann, P. (2005) · Annual Review of Microbiology · doi:10.1146/annurev.micro.59.030804.121041 · Cited by 1,050
Self-citationGenome evolution in bacterial endosymbionts of insects
Wernegreen, J. J. (2002) · Nature Reviews Genetics · doi:10.1038/nrg931 · Cited by 487
Self-citationEvolutionary microbial genomics: insights into bacterial host adaptation
Toft, C., & Andersson, S. G. E. (2010) · Nature Reviews Genetics · doi:10.1038/nrg2798 · Cited by 432
Bacterial endosymbionts in animals
Moran, N. A., & Baumann, P. (2000) · Current Opinion in Microbiology · doi:10.1016/s1369-5274(00)00088-6 · Cited by 273
Self-citationModel misspecification and probabilistic tests of topology: evidence from empirical data sets.
Buckley, T. R. (2002) · Systematic Biology · doi:10.1080/10635150290069922 · Cited by 253
Metadata
- Authors
- Clark, M. A., Moran, N. A., Baumann, P., & Wernegreen, J. J.
- Venue
- Evolution
- Publisher
- Oxford University Press (OUP)
- Published
- 2000-04
- Volume
- 54
- Issue
- 2
- Pages
- 517-525
- ISSN
- 0014-3820 (ISSN-L)
- 1558-5646
- OpenAlex
- W2179331560
- Cited by
- 255
- References
- 1
- FWCI
- 19.21
- Type
- journal article
- Language
- en
- Open access
- closed
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- Clark, M. A., Moran, N. A., Baumann, P., & Wernegreen, J. J. (2000). COSPECIATION BETWEEN BACTERIAL ENDOSYMBIONTS (BUCHNERA) AND A RECENT RADIATION OF APHIDS (UROLEUCON) AND PITFALLS OF TESTING FOR PHYLOGENETIC CONGRUENCE. Evolution. https://doi.org/10.1111/j.0014-3820.2000.tb00054.x
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