Growth and wood properties of genetically improved loblolly pine: propagation type comparison and genetic parameters Public Deposited

http://ir.library.oregonstate.edu/concern/articles/r207tr13m

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  • The use of clonal varieties in forestry offers great potential to improve growth traits (quantity) and wood properties (quality) of loblolly pine (Pinus taeda L.). Loblolly pine trees established via somatic embryogenesis (clones), full-sib zygotic crosses, and half-sib zygotic open-pollinated families were sampled to identify variation in growth and wood properties among and within clonal lines and zygotic controls. Increment cores 5 mm in diameter were collected at age 4 from a total of 2615 trees. Growth properties (diameter at 1.4 m and total tree height) and wood properties (whole-core density, latewood and earlywood density, and latewood percent) were measured for each tree sampled in the study. Overall, growth properties were better for full-sib seedling than for clonal lines, whereas wood density was higher for clonal lines than full-sib and open-pollinated seedlings. However, there were clonal lines with better growth and higher wood density. Clonal repeatability of both growth and wood properties across sampled sites and genetic correlations between growth and wood traits were determined, with higher repeatability observed for wood traits compared with growth traits. Significant genetic correlations were observed for tree height and wood properties, whereas weak correlations were observed for diameter and wood properties.
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  • Finto, A., Schimleck, L. R., Jordan, L., Hornsby, B., Dahlen, J., Daniels, R. F., ... & Huber, D. (2014). Growth and wood properties of genetically improved loblolly pine: propagation type comparison and genetic parameters. Canadian Journal of Forest Research, 44(3), 263-272. doi:10.1139/cjfr-2013-0163
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