In the recently rejuvenated Populetum near the Dutch town of Zeewolde grows what may well be the poplar of the future. The only things is, Wageningen research still has to pinpoint which one it is.
Factors in the selection, besides growth rate (wood volume), include things like trunk shape (for use for timber) and disease resistance. Research is also being done, in collaboration with the Forest Ecology and Forest Management group and SHR Houtresearch, on the scope for wood modification, to see whether poplar wood has potential for use as building material.
Read the whole article "The turbo trees of the future" by Roelof Kleis (Resource, Science, February 22, 2018)