As the evolutionary significance of hybridization is largely dictated by its extent beyond the first generation, we broadly surveyed patterns of introgression across a sympatric zone of two native poplars (Populus balsamifera, Populus deltoides) in Quebec, Canada within which European exotic Populus nigra and its hybrids have been extensively planted since the 1800s. Single nucleotide polymorph...

Populus deltoides, P. nigra, and P. trichocarpa are the most important species for poplar breeding programs worldwide. In addition, Populus has become a model for fundamental research on trees. Linkage maps were constructed for these three species by analyzing progeny of two controlled crosses sharing the same female parent, Populus deltoides cv. S9-2 x P. nigra cv. Ghoy and P. deltoides cv. S9...

Bud exudates from twelve clones o f Populus nigra originating from seven countries were analyzed by gas chromatography-mass spectrometry and the principal compounds identified. Specimens o f P. nigra var betulifolia differed in bud exudate composition from the other speci­ mens analyzed, and were more similar in exudate composition to P. deltoides than were the other specimens. The range o f bu...

Phytoremediation potentials of four poplar lines, Populus nigra (N-SL clone), Populus canescens, and two transgenic P. canescens clones were investigated using in vitro leaf discs cultures. The transgenic poplars overexpressed a bacterial gene encoding gamma-glutamylcysteine synthetase in the cytosol (11ggs) or in the chlopoplasts (6LgI), and therefore, they contained an elevated level of gluta...

The presence of flavonoid aglycones in bud ex­ cretions has been stressed and they have been stud­ ied in great detail by one of us in the 1970s. Exu­ date flavonoids were reported for members of the genera Aesculus (Hippocastanaceae, [1]), for Alnus, Betula, and Ostrya (Betulaceae, see [2]), for Populus (Salicaceae; see e.g. [3] and ref. therein), for Prunus (Rosaceae, [4]), and for Rhamnus (R...