Sources of phenotypic variation of wood density and relationships with mean growth in two Eucalyptus species in Argentina

Aims of the study: To describe radial patterns wood density, and to identify their main sources variation, potential tradeoffs with mean tree growth, in two Eucalyptus species. Area Mesopotamian (Corrientes Entre Ríos provinces) Pampean region (Buenos Aires province) Argentina. Materials methods: grandis viminalis, growing genetic trials installed sites per species were studied. X-ray microdensity profiles developed from core samples. Each profile was proportionally divided 10 sections. Mean, maximum, minimum standard deviation for each section computed. Mean annual growth used study relationships variables. A linear mixed-effects model computed significance different phenotypic variation. Pearson´s correlation between Main results: The pattern variation E. showed a decrease density pith bark, mainly due while increased towards outer wood. In both species, along bark. Significant explained by site, provenance clone/family effects. mean, maximum negatively correlated whereas viminalis correlations positive but close zero. Research highlights: Both relationship studied they varied within depending on site provenance. Keywords: profile; properties; products; plasticity; grandis; viminalis.