期刊
ECOLOGY AND EVOLUTION
卷 6, 期 18, 页码 6565-6577出版社
WILEY
DOI: 10.1002/ece3.2358
关键词
Amplified fragment length polymorphism; host forms; host races; Ilex; sympatric speciation
资金
- National Science Foundation [NSF DBI-1052875, NSF DEB-0710194]
- Cosmos Club Foundation
- Agricultural Research Service [5812752383]
- Div Of Biological Infrastructure
- Direct For Biological Sciences [1052875] Funding Source: National Science Foundation
Evolutionary radiations have been well documented in plants and insects, and natural selection may often underly these radiations. If radiations are adaptive, the diversity of species could be due to ecological speciation in these lineages. Agromyzid flies exhibit patterns of repeated host-associated radiations. We investigated whether host-associated population divergence and evidence of divergent selection exist in the leaf miner Phytomyza glabricola on its sympatric host plants, the holly species, Ilex coriacea and I.glabra. Using AFLPs and nuclear sequence data, we found substantial genetic divergence between host-associated populations of these flies throughout their geographic range. Genome scans using the AFLP data identified 13 loci under divergent selection, consistent with processes of ecological speciation. EF-1 data suggest thatI.glabra is the original host of P.glabricola and that I.coriacea is the novelhost, but the AFLP data are ambiguous with regard to directionality of the host shift.
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