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Application of genetic markers to the discrimination of European Black Poplar (Populus nigra) from American Black Poplar (P. deltoides) and Hybrid Poplars (P. x canadensis) in Switzerland

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Abstract

European Black Poplar (Populus nigra) is considered a rare and endangered tree species because of severe reduction of its natural riverine habitat and potential hybridisation with the related non-indigenous taxa P. deltoides and P. x canadensis. As it is difficult to distinguish these taxa solely based on their morphology, we applied a PCR-based assay with an easy-to-use and robust molecular marker set (cpDNA trnL-trnF/RsaI RFLP, nDNA win3 and nDNA POPX/MspI RFLP) in order to identify pure P. nigra. Different plant tissues could be used for fast and standardised DNA extraction. The application of the three marker types was tested on a number of different Populus taxa, and they were also used for the verification of pure P. nigra in a sample of 304 putative P. nigra individuals from Switzerland. Cross-checking of the DNA data with those using a traditional allozyme approach resulted in complete agreement. The availability of molecular identification methods is an important prerequisite for the conservation of European Black Poplar, because pure, non-introgressed plant material can then be used in restoration projects of European floodplains.

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Acknowledgements

We thank Annie Diarra, Fabienne Bourquin and Amira Sepic for help in the laboratory, Peter Lawrenz for the sampling of the blind test poplars and many foresters and forest authorities, especially Markus Bolliger, for their support. We would also like to thank Patrick Bonfils, Andreas Rudow, Peter Rotach, Peter Schwab und Marcus Ulber for help throughout the work. This research was financed by the BUWAL/Swiss Federal Forest Direction. Finally, we thank Ivana Stehlik, Berthold Heinze and an anonymous referee for critical comments on the manuscript

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Correspondence to R. Holderegger.

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Holderegger, R., Angelone, S., Brodbeck, S. et al. Application of genetic markers to the discrimination of European Black Poplar (Populus nigra) from American Black Poplar (P. deltoides) and Hybrid Poplars (P. x canadensis) in Switzerland. Trees 19, 743–748 (2005). https://doi.org/10.1007/s00468-005-0006-6

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  • DOI: https://doi.org/10.1007/s00468-005-0006-6

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