Oviposition traits generate extrinsic postzygotic isolation between two pine sawfly species
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- 作者：Emily E. Bendall ; Kim L. Vertacnik ; Catherine R. Linnen
- 关键词：Ecological speciation ; Reproductive barriers ; Host adaptation ; Phytophagous insect ; Diprionidae ; Neodiprion
- 刊名：BMC Evolutionary Biology
- 出版年：2017
- 出版时间：December 2017
- 年：2017
- 卷：17
- 期：1
- 全文大小：4137KB
- 刊物主题：Evolutionary Biology; Animal Systematics/Taxonomy/ Biogeography; Entomology; Genetics and Population Dynamics; Life Sciences, general;
- 出版者：BioMed Central
- ISSN：1471-2148
- 卷排序：17
文摘
BackgroundAlthough empirical data indicate that ecological speciation is prevalent in nature, the relative importance of different forms of reproductive isolation and the traits generating reproductive isolation remain unclear. To address these questions, we examined a pair of ecologically divergent pine-sawfly species: while Neodiprion pinetum specializes on a thin-needled pine (Pinus strobus), N. lecontei utilizes thicker-needled pines. We hypothesized that extrinsic postzygotic isolation is generated by oviposition traits. To test this hypothesis, we assayed ovipositor morphology, oviposition behavior, and host-dependent oviposition success in both species and in F1 and backcross females.