Luis A. Apiolaza edited Results.tex  over 7 years ago

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\caption{Narrow sense heritability of measured wood properties, calculated as per Equation \ref{gse}.}   \end{table}  Wood processors pay premiums fortimber  stable and stiff, stiff timber,  while forest growers often prefer to have fast growing trees as to shorten rotation lengths increasing profitability. The preferences are not always aligned, particularly within wood properties. Stiffness, used for grading logs, is positively correlated with growth-strain with aPerson  correlationcoefficient  of 0.61, a substantial an  unfavourable correlation requiring a trade off between the two. two traits.  While zero growth-strain is desirable to be economically viable to process, some unknown maximum value below which little economic loss is experienced exists. Stiffness is already used for log grades, structural timber in New Zealand requires 8 GPa \citep{nzs3603}. To met these stiffness grades at age two some compromise with the level of growth-strain in the stems is needed. All stems measured within each family were averaged to give correlations between properties at the family level.All correlations increase in strength when compared to individual stem correlations.  A very strong positive relationship is evident between growth-strain and stiffness at the family level. This means that reducing growth-strain will require reducing wood stiffness at the population level. On the positive side, some  \textit{Eucalyptus} species have such high wood stiffness that a reduction would not have practical implications from a wood processing viewpoint. \begin{table}   \begin{tabular}{ c c c c c c }