Variance components (VP, VBP, VA, VR), narrow-sense heritability (h2ns), coefficient of variation (CVP, CVA, CVBP, CVR) and population differentiation (QST) for all studied maritime pine populations.

h2ns is the narrow-sense heritability and SE is the standard error of heritability, VP is the phenotypic genetic variance, VA is the additive genetic variance, VBP is the between-population variance, VR is the residual variance. CVA is the variation coefficient of additive variance after adjustment for the block effect. CVP is the variation coefficient of phenotypic variance after adjustment for the block effect. CVR is the residual coefficient of variation. CVBP is between-population coefficients of variation. QST is the genetic quantitative variation between populations (Spitze, 1993). The significance of random effects is indicated after each variance estimator: nsP > 0.05, *P**P***Pa CVs for δ13C are not comparable with other traits as they are estimated relative to a standard.