A fast and simple genetic survey reveals the spread of poplar hybrids at a natural Elbe river site

摘要: It is known that various poplar species and cultivated hybrids have the potential to interbreed produce fertile offspring. Conservation strategies for genetic resources of endangered Eurasian black (Populus nigra L.) thus rely on a monitoring which enables identification verification pure status. At same time, risk hybrid dispersal introgressive gene flow has be estimated. In present study combination two molecular markers, one from chloroplast DNA other nuclear DNA, was applied evaluate large P. population Elbe River. Hybrid clones × canadensis are scattered within this also occur as plantations in surrounding landscape. By means markers taxonomic status 208 adult trees 140 young poplars along riverbank monitored. From analysed poplars, almost 20 percent were found exhibit at least deltoides or diagnostic alleles genotypes, respectively. Possible vegetative spreads F1 precedent mating scenarios discussed. Most interestingly we clear evidence small number backcross where acted pollen donor. This case had long been debated thought less probable, so far.