Introgressive hybridization in Rorippa (Brassicaceae): gene flow and its consequences in natural and anthropogenic habitats

DC FieldValueLanguage
dc.contributor.authorBleeker, W
dc.contributor.authorHurka, H
dc.date.accessioned2021-12-23T16:01:08Z-
dc.date.available2021-12-23T16:01:08Z-
dc.date.issued2001
dc.identifier.issn09621083
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/4786-
dc.description.abstractIntrogressive hybridization between three Rorippa species (R. amphibia, R. palustris and R. sylvestris) in northern Germany has been studied using isozymes and noncoding chloroplast DNA (trnL/F spacer). Our results provide substantial evidence for different patterns of gene flow in natural and in anthropogenic environments. Hybridization and bi-directional introgression (chloroplast DNA and allozymes) between R. amphibia and R. sylvestris were detected at the river Elbe, which is one of the last rivers in Central Europe showing a natural dynamic of erosion and sedimentation. The natural dynamic of the Elbe leads to periodic habitat disturbance and the temporal breakdown of ecological isolation barriers between R. amphibia and R, sylvestris. However, the high dynamic does not provide the opportunity for persistence of the morphologically intermediate hybrid R. x anceps (R. amphibia x R. sylvestris). We did not find hybrid zones between R. amphibia and R. sylvestris in the more anthropogenic landscape of northwest Germany. However, contact zones between R. amphibia and R. palustris were detected in drainage ditches in northwest Germany. We found substantial evidence for unidirectional introgression. of R. palustris markers (chloroplast DNA and allozymes) into R. amphibia in the man-made habitats. The R. amphibia introgressants in the drainage ditches often showed strongly serrate upper cauline leaves instead of the entire upper cauline leaves typical for R. amphibia. We argue that landscape melioration in northwest Germany, particularly the creation of drainage ditches, favoured both hybrid-zone formation and ecotypic differentiation within R. amphibia.
dc.language.isoen
dc.publisherBLACKWELL SCIENCE LTD
dc.relation.ispartofMOLECULAR ECOLOGY
dc.subjectBiochemistry & Molecular Biology
dc.subjectCAPSELLA BRASSICACEAE
dc.subjectCARDAMINE
dc.subjectCHLOROPLAST DNA
dc.subjectEcology
dc.subjectecotypic differentiation
dc.subjectEnvironmental Sciences & Ecology
dc.subjectEVOLUTION
dc.subjectEvolutionary Biology
dc.subjectintrogression
dc.subjectISOZYMES
dc.subjectman-made habitats
dc.subjectMOLECULAR EVIDENCE
dc.subjectPOPULATION-SIZE
dc.subjectSPECIATION
dc.subjectTOMATO
dc.titleIntrogressive hybridization in Rorippa (Brassicaceae): gene flow and its consequences in natural and anthropogenic habitats
dc.typejournal article
dc.identifier.doi10.1046/j.1365-294X.2001.01341.x
dc.identifier.isiISI:000170667500014
dc.description.volume10
dc.description.issue8
dc.description.startpage2013
dc.description.endpage2022
dc.contributor.researcheridA-7984-2008
dc.publisher.placeP O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND
dcterms.isPartOf.abbreviationMol. Ecol.
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