Ploidy Level Affects Important Biomass Traits of Novel Shrub Willow (Salix) Hybrids Serapiglia, Michelle J. ; Gouker, Fred E. ; Hart, J. Foster ; Unda, Faride ; Mansfield, Shawn D. ; Stipanovic, Arthur J. ; Smart, Lawrence B. Abstract Publication: BioEnergy Research Pub Date: March 2015 DOI: 10.1007/s12155-014-9521-x Bibcode: 2015BioER...8..259S