“
“Short-rotation coppice (SRC) with poplar or other fast-growing species for the production of bioenergy is currently gaining interest within the framework of global energy supply (Sadrul Islam and Ahiduzzaman, 2012). selleck screening library The success rate of renewable bioenergy from SRC cultures primarily depends on their sustainability and productivity or biomass yield. The choice of the genotypic materials used for the SRC cultures largely determines the amount of biomass that can be produced in a specific area or region (Kuiper, 2003).

Therefore there is a need to study the performance of genotypes in situ to select the best performing genotypes. Nevertheless, on operational, large-scale plantations the use of a sufficiently broad genetic diversity among the planted genotypes is necessary to decrease cultivation risks such as diseases, insects or pests, rather than relying on the single highest performing genotype only. Moreover, mixing several genotypes with complementary strategies in a SRC plantation possibly results in a more efficient use of abiotic site resources (McCracken et al., 2001). Continuous breeding and selection efforts are required to continuously improve productivity of the genotypic materials, in particular for short rotation biomass plantations, and to create a sufficiently large genetic variation in the commercially available genetic materials. In Belgium and in The Netherlands

any new poplar genotype is submitted to a 20 yr screening and selection period before it is certified and put on the Olaparib solubility dmso buy Temsirolimus list of commercially available plant materials. Despite the historical popularity and preserved current importance of Populus tree species in both countries ( De Cuyper, 2008 and de Vries, 2008), the application in SRC cultures is limited. To our knowledge, the genotypes in the present study (cfr. 2.1) have rarely been studied (except for the oldest genotype ‘Robusta’) and have never been planted in large-scale operational bio-energy plantations. Besides the fact that the other 11 genotypes were commercialized for a few decades, their use in SRC plantations is still

new. All 12 genotypes were planted in a large-scale SRC culture for the production of biomass for bioenergy. The establishment of such a large-scale multiclonal plantation allowed us to have ample replications per genotype (both areal replications to account for spatial variability, as well as replicated and harvestable plant material per tree/genotype). Growing several genotypes together while measuring their responses in a shared environment is commonly applied to understand how much genetic variation is available in particular traits (Dunlap and Stettler, 1998). The study of this variability is then valuable for determining the efficiency of selection for the trait in future breeding and selection processes (Rae et al., 2004).