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Speciation by host-switching in pinyon Cinara (Insecta: Hemiptera: Aphididae).
Mol Phylogenet Evol. 2004 Jul; 32(1):139-51.MP

Abstract

Parasite-host cospeciation has received much attention as an important mechanism in the diversification of phytophagous insects. However, studies have shown that for certain taxa, it is not host fidelity but host-switching that plays the critical role in speciation. Cinara are aphids (Insecta: Hemiptera: Aphididae: Lachninae) that feed exclusively on the woody parts of conifers of the Cupressaceae and Pinaceae. They are unusual aphids because most Pinaceae play host to several species of Cinara. The aphids show relatively strong host fidelity, and as a consequence historically have been treated based on the taxonomy of their hosts. The historical paradigm of aphid evolution implies that Cinara species have radiated to different parts of the same host species and/or speciated with their host. Using mitochondrial cytochrome oxidase 1 and nuclear elongation factor 1-alpha DNA sequences, we performed molecular phylogenetic analysis of Cinara species, concentrating on those associated with pinyon pines in the southwestern USA. We determined that switching hosts has played a key role in the speciation of the genus, reflected in the polyphyly of pinyon-feeding Cinara. Furthermore, species sharing a common feeding site on different hosts were more closely related to each other than to those sharing the same host but at different feeding sites, suggesting that feeding site fidelity plays a more important role in speciation than does host fidelity in general. This study also elucidated the primary taxonomy of various species: it suggested that Cinara rustica Hottes is a junior synonym of C. edulis (Wilson) and that C. wahtolca Hottes represents two species on the two different pinyon pine species, Pinus edulis Englem. and P. monophylla Torr. & Frem.

Authors+Show Affiliations

Illinois Natural History Survey, Champaign, IL 61820, USA. crf@uiuc.eduNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15186803

Citation

Favret, Colin, and David J. Voegtlin. "Speciation By Host-switching in Pinyon Cinara (Insecta: Hemiptera: Aphididae)." Molecular Phylogenetics and Evolution, vol. 32, no. 1, 2004, pp. 139-51.
Favret C, Voegtlin DJ. Speciation by host-switching in pinyon Cinara (Insecta: Hemiptera: Aphididae). Mol Phylogenet Evol. 2004;32(1):139-51.
Favret, C., & Voegtlin, D. J. (2004). Speciation by host-switching in pinyon Cinara (Insecta: Hemiptera: Aphididae). Molecular Phylogenetics and Evolution, 32(1), 139-51.
Favret C, Voegtlin DJ. Speciation By Host-switching in Pinyon Cinara (Insecta: Hemiptera: Aphididae). Mol Phylogenet Evol. 2004;32(1):139-51. PubMed PMID: 15186803.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Speciation by host-switching in pinyon Cinara (Insecta: Hemiptera: Aphididae). AU - Favret,Colin, AU - Voegtlin,David J, PY - 2003/06/12/received PY - 2003/12/08/revised PY - 2004/6/10/pubmed PY - 2005/1/13/medline PY - 2004/6/10/entrez SP - 139 EP - 51 JF - Molecular phylogenetics and evolution JO - Mol Phylogenet Evol VL - 32 IS - 1 N2 - Parasite-host cospeciation has received much attention as an important mechanism in the diversification of phytophagous insects. However, studies have shown that for certain taxa, it is not host fidelity but host-switching that plays the critical role in speciation. Cinara are aphids (Insecta: Hemiptera: Aphididae: Lachninae) that feed exclusively on the woody parts of conifers of the Cupressaceae and Pinaceae. They are unusual aphids because most Pinaceae play host to several species of Cinara. The aphids show relatively strong host fidelity, and as a consequence historically have been treated based on the taxonomy of their hosts. The historical paradigm of aphid evolution implies that Cinara species have radiated to different parts of the same host species and/or speciated with their host. Using mitochondrial cytochrome oxidase 1 and nuclear elongation factor 1-alpha DNA sequences, we performed molecular phylogenetic analysis of Cinara species, concentrating on those associated with pinyon pines in the southwestern USA. We determined that switching hosts has played a key role in the speciation of the genus, reflected in the polyphyly of pinyon-feeding Cinara. Furthermore, species sharing a common feeding site on different hosts were more closely related to each other than to those sharing the same host but at different feeding sites, suggesting that feeding site fidelity plays a more important role in speciation than does host fidelity in general. This study also elucidated the primary taxonomy of various species: it suggested that Cinara rustica Hottes is a junior synonym of C. edulis (Wilson) and that C. wahtolca Hottes represents two species on the two different pinyon pine species, Pinus edulis Englem. and P. monophylla Torr. & Frem. SN - 1055-7903 UR - https://www.unboundmedicine.com/medline/citation/15186803/Speciation_by_host_switching_in_pinyon_Cinara__Insecta:_Hemiptera:_Aphididae__ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1055790304000223 DB - PRIME DP - Unbound Medicine ER -