Juvenile–mature relationships and heritability estimates of several traits in loblolly pine (Pinustaeda)

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Abstract
Heritability estimates for wood specific gravity of loblolly pine (P. taeda L.) in east Texas [USA] were high and relatively constant for all ages of wood sampled, but tracheid length has low heritability at all ages. Heritability estimates for tracheid length declined with age after age 4 yr. Coefficients of genetic prediction indicated that specific gravity of age 2 wood is a reliable predictor of wood specific gravity at age 25. Genetic covariances between juvenile and mature tracheid length were approximately zero. Coefficients of genetic prediction and genetic correlations between specific gravity and height and diameter at age 20 yr indicated a strong negative relationship.

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