Plant & Animal Genome IX Conference

Poster: Forest Trees
P5i_07.html

IDENTIFICATION OF QTL INFLUENCING CHEMICAL WOOD PROPERTY TRAITS IN LOBLOLLY PINE (Pinus taeda L.)

¹ Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA

² Institute of Forest Genetics, PSW-USDA Forest Service, Dept. of Environmental Horticulture, University of California, Davis, CA, USA

³ National Renewable Energy Laboratory, US Department of Energy, Centralia, WA, USA

⁴ Weyerhauser Company, Western Forest Research Center, Centralia, WA, USA

Chemical wood property traits for loblolly pine (Pinus taeda L.) were analyzed for the presence of quantitative trait loci (QTL) in a three-generation outbred pedigree. These traits were assayed using pyrolysis molecular beam mass spectrometry and include various components of cellulose, hemicellulose and lignin. Data for both early- and latewood from the fifth ring were analyzed for each trait. An interval mapping approach designed for an outbred pedigree was used to estimate the number of QTL, the magnitude of QTL effects, and their genomic position. Twelve unique QTL influencing cell wall chemistry were detected. Significant differences in chemical contents were observed among the populations from North Carolina vs. Oklahoma, and results from QTL x site analyses suggest that QTL interact with environmental location.