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Phylogeny, Evolution and Biogeography of Gall-Forming Aphids (Insecta: Homoptera) : A Case Study from the Eriosomatini
| Title: | Phylogeny, Evolution and Biogeography of Gall-Forming Aphids (Insecta: Homoptera) : A Case Study from the Eriosomatini |
| Authors: | Akimoto, Shin-ichi Browse this author |
| Keywords: | Asexual | | Host alternation | | Disjunct distribution | | Refuge | | Relict |
| Issue Date: | 2004 |
| Publisher: | Graduate School of Science, Hokkaido University |
| Citation: | Edited by Shunsuke F. Mawatari, Hisatake Okada. |
| Journal Title: | Neo-Science of Natural History: Integration of Geoscience and Biodiversity Studies : Proceedings of International Symposium on "Dawn of a New Natural History - Integration of Geoscience and Biodiversity Studies" March 5-6, 2004, Sapporo |
| Start Page: | 19 |
| End Page: | 26 |
| Abstract: | Gall-forming aphids are highly specific to their host plants, and speciation in galling aphids has proceeded in association with a single species or species group of host plants (primary host). This study firstly aims to revise the associations between galling aphids and their host plants by focusing on historical changes in the distribution of host plants. Aphids of the Eriosomatinae are typically associated with the primary and secondary host plants and alternate host plants seasonally, with sexual reproduction on the primary host plant. However, some species are not host-alternating and are wholly parthenogenetic on the secondary host plant. This study secondly aims to test the possibility of long-term persistence of an aphid species by means of parthenogenesis (relict hypothesis). The eriosomatine genus Colopha is a small aphid group represented by three sexual and three asexual species. The sexual species are associated with two Ulmus sister species distributed disjunctly in Europe and eastern North America. In East Asia, an asexual species, Colopha kansugei, is distributed widely on the secondary host. This study tested whether the relict hypothesis is applicable to C. kansugei by comparing DNA sequences. A high rate of substitution (3.4% at the maximum) was found in the mitochondrial COI sequence between local populations. Available evidence suggests that Colopha kansugei has persisted on the secondary host plant through parthenogenesis, probably following the local extinction of the primary host. Use of molecular techniques might possibly detect much more ancient species among parthenogenetic aphids with disjunct distributions. |
| Description: | International Symposium on "Dawn of a New Natural History - Integration of Geoscience and Biodiversity Studies". 5-6 March 2004. Sapporo, Japan. |
| Conference Name: | International Symposium on "Dawn of a New Natural History : Integration of Geoscience and Biodiversity Studies" |
| Conference Place: | Sapporo |
| Type: | proceedings |
| URI: | http://hdl.handle.net/2115/38485 |
| Appears in Collections: | Neo-Science of Natural History : Integration of Geoscience and Biodiversity Studies > Proceedings
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