Lack of assortative mating might explain reduced phenotypic differentiation where two grasshopper species meet

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dc.citation.issue4
dc.citation.volume35
dc.contributor.authorMorgan-Richards M
dc.contributor.authorVilcot M
dc.contributor.authorTrewick SA
dc.coverage.spatialSwitzerland
dc.date.accessioned2024-01-10T00:39:28Z
dc.date.accessioned2024-07-25T06:36:27Z
dc.date.available2021-06-19
dc.date.available2024-01-10T00:39:28Z
dc.date.available2024-07-25T06:36:27Z
dc.date.issued2022-04-12
dc.description.abstractHybridization is an evolutionary process with wide-ranging potential outcomes, from providing populations with important genetic variation for adaptation to being a substantial fitness cost leading to extinction. Here, we focussed on putative hybridization between two morphologically distinct species of New Zealand grasshopper. We collected Phaulacridium marginale and Phaulacridium otagoense specimens from a region where mitochondrial introgression had been detected and where their habitat has been modified by introduced mammals eating the natural vegetation and by the colonization of many non-native plant species. In contrast to observations in the 1970s, our sampling of wild pairs of grasshoppers in copula provided no evidence of assortative mating with respect to species. Geometric morphometrics on pronotum shape of individuals from areas of sympatry detected phenotypically intermediate specimens (putative hybrids), and the distribution of phenotypes in most areas of sympatry was found to be unimodal. These results suggest that hybridization associated with anthropogenic habitat changes has led to these closely related species forming a hybrid swarm, with random mating. Without evidence of hybrid disadvantage, we suggest a novel hybrid lineage might eventually result from the merging of these two species.
dc.description.confidentialfalse
dc.edition.editionApril 2022
dc.format.pagination509-519
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/34091960
dc.identifier.citationMorgan-Richards M, Vilcot M, Trewick SA. (2022). Lack of assortative mating might explain reduced phenotypic differentiation where two grasshopper species meet.. J Evol Biol. 35. 4. (pp. 509-519).
dc.identifier.doi10.1111/jeb.13879
dc.identifier.eissn1420-9101
dc.identifier.elements-typejournal-article
dc.identifier.issn1010-061X
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/70526
dc.languageeng
dc.publisherJohn Wiley and Sons Ltd on behalf of European Society for Evolutionary Biology
dc.publisher.urihttps://onlinelibrary.wiley.com/doi/10.1111/jeb.13879
dc.relation.isPartOfJ Evol Biol
dc.rights(c) 2021 The Author/s
dc.rightsCC BY-NC 4.0
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/
dc.subjectanthropocene
dc.subjectassortative mating
dc.subjectgene flow
dc.subjectgeometric morphometrics
dc.subjecthybrid swarm
dc.subjecthybrid zone
dc.subjectintermediate phenotype
dc.subjectAnimals
dc.subjectGrasshoppers
dc.subjectHybridization, Genetic
dc.subjectMammals
dc.subjectPhenotype
dc.subjectReproduction
dc.subjectSympatry
dc.titleLack of assortative mating might explain reduced phenotypic differentiation where two grasshopper species meet
dc.typeJournal article
pubs.elements-id446091
pubs.organisational-groupOther
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