Taxa distribution and RAPD markers indicate different origin and regional differentiation of hybrids in the invasive Fallopia complex in central-western Europe

Plant Biology
Christine KrebsJ-P Bizoux

Abstract

Interspecific hybridization can be a driving force for evolutionary processes during plant invasions, by increasing genetic variation and creating novel gene combinations, thereby promoting genetic differentiation among populations of invasive species in the introduced range. We examined regional genetic structure in the invasive Fallopia complex, consisting of F. japonica var. japonica, F. sachalinensis and their hybrid F. x bohemica, in seven regions in Germany and Switzerland using RAPD analysis and flow cytometry. All individuals identified as F. japonica var. japonica had the same RAPD phenotype, while F. sachalinensis (11 RAPD phenotypes for 11 sampled individuals) and F. x bohemica (24 RAPD phenotypes for 32 sampled individuals) showed high genotypic diversity. Bayesian cluster analysis revealed three distinct genetic clusters. The majority of F. x bohemica individuals were assigned to a unique genetic cluster that differed from those of the parental species, while the other F. x bohemica individuals had different degrees of admixture to the three genetic clusters. At the regional scale, the occurrence of male-fertile F. sachalinensis coincided with the distribution of F. x bohemica plants showing a high percentage of as...Continue Reading

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Citations

Jun 10, 2011·Oecologia·Christine KrebsUrs Schaffner
Mar 26, 2014·Evolutionary Applications·Madalin ParepaOliver Bossdorf
Aug 31, 2016·PloS One·Katarzyna BzdegaBarbara Tokarska-Guzik
Jan 13, 2018·Ecology and Evolution·Anne-Kari HolmMay B Brurberg

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