Early rooting and flooding tolerance in cuttings from a Populus deltoides full-sib family under greenhouse conditions

Eastern cottonwood (Populus deltoides Bartr. ex Marsh.) is an important forest tree, with elite genotypes propagated mainly as unrooted dormant cuttings. Several areas where P. planted periodically experience flooding episodes. The aims of this work were to analyze the early rooting capability and tolerance a full-sib family, identify growth, wood, leaf traits that correlate tolerance. We analyzed parental 30 clones from F 1 generation under greenhouse conditions. percentage cuttings ranged 50% 100%. There was positive genetic correlation between shoot weight root (number, biomass, total length). In separate experiment, 2-month-old plants growing in pots same subjected two treatments: watering (control) for 35 days. Most showed intermediate respect clones. Height, diameter, growth rate, plant area, number, increase rate had phenotypic tolerance, while wood density did not. Height diameter are recommended selection because they easy measure, have moderate high narrow sense heritability.