A test of the sympatric host race formation hypothesis in Neodiprion (Hymenoptera: Diprionidae).

TitleA test of the sympatric host race formation hypothesis in Neodiprion (Hymenoptera: Diprionidae).
Publication TypeJournal Article
Year of Publication2010
JournalProceedings. Biological sciences
Volume277
Issue1697
Pagination3131-8
Date Published2010
ISSN0962-8452
Abstract

Theory suggests that sympatric speciation is possible; however, its prevalence in nature remains unknown. Because Neodiprion sawflies are host specialists and mate on their hosts, sympatric speciation via host shifts may be common in this genus. Here, we test this hypothesis using near-complete taxonomic sampling of a species group, comprehensive geographical and ecological data, and multiple comparative methods. Host-use data suggest that host shifts contributed to the evolution of reproductive isolation in Neodiprion and previous work has shown that gene flow accompanied divergence. However, geographical data provide surprisingly little support for the hypothesis that host shifts occurred in sympatry. While these data do not rule out sympatric host race formation in Neodiprion, they suggest that this speciation mode is uncommon in the genus and possibly in nature.

URLhttp://rspb.royalsocietypublishing.org/cgi/pmidlookup?view=long&pmid=20504811
DOI10.1098/rspb.2010.0577
Short TitleProc Biol Sci
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