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The role of dispersal for genetic and phenotypic variation: insights from comparisons of sympatric pygmy grasshoppers
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). (Ctr Ecol & Evolut Microbial Model Syst EEMIS)
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). (Ctr Ecol & Evolut Microbial Model Syst EEMIS)ORCID-id: 0000-0001-9598-7618
2017 (engelsk)Inngår i: Biological Journal of the Linnean Society, ISSN 0024-4066, E-ISSN 1095-8312, Vol. 122, nr 1, s. 84-97Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Patterns of genetic and phenotypic variation within and among populations are influenced by a complex interplay of ecological and evolutionary processes. Theory posits that gene flow should increase diversity within and reduce differentiation between populations. Evaluating these predictions is potentially complicated by selection, population dynamics and plasticity that may also affect genetic and phenotypic variation. Here, we compare genetic and morphological variation between sympatric populations of two pygmy grasshopper species, Tetrix subulata and T. undulata, that differ in dispersal capacity. We found that genetic differentiation between populations is lower on average in the generally dispersive T. subulata compared with the mostly sedentary T. undulata, suggesting that genetic structure in the latter species has been less influenced by the homogenizing effects of migration. Our results also provided weak support for the hypothesis that neutral genetic diversity within populations should be higher in T. subulata than in T. undulata. We further found that body size varied among populations in both species, but the differences seen in T. subulata did not parallel those seen in T. undulata, indicating that the two species have unique plasticity responses or that they have responded differently to shared selective regimes. Our findings illustrate the utility of the pairwise comparative approach and further highlight that results and conclusions may not be transferrable even between closely related species.

sted, utgiver, år, opplag, sider
Oxford University Press, 2017. Vol. 122, nr 1, s. 84-97
Emneord [en]
body size, dispersal polymorphism, evolution, genetic structure, Orthoptera, Tetrigidae, wing polymorphism
HSV kategori
Forskningsprogram
Ekologi, Evolutionsbiologi
Identifikatorer
URN: urn:nbn:se:lnu:diva-68074DOI: 10.1093/biolinnean/blx055ISI: 000409213700007Scopus ID: 2-s2.0-85052510533OAI: oai:DiVA.org:lnu-68074DiVA, id: diva2:1143750
Tilgjengelig fra: 2017-09-22 Laget: 2017-09-22 Sist oppdatert: 2019-08-29bibliografisk kontrollert

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