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The effect of partially CAD-deficient loblolly pine (cad-nl heterozygotes) on wood density and growth was studied in a 10-year-old genotype X nutrition field experiment in Scotland County, North Carolina. Segregation analysis indicted that the cad-nl locus itself might represent a gene that governs wood density, especially the proportion of latewood in pine. We found that cad-nl heterozygotes had a significantly higher wood density compared to CAD wild-type trees. Fertilization effect was highly significant for both growth and wood density traits. CAD genotype-fertilizer interactions were not significant for any of the measurement traits.


Conference paper

Publication Date



649 - 659