TABLE 3.

Individual narrow‐sense heritability estimates ^a (${\widehat{h}}^2$) for drought response traits and conventional growth and wood traits for both Normandin and Watford study sites obtained with ABLUP and GBLUP ^b . Standard errors around heritability estimates are shown in parentheses. Levels of statistical significance ^c shown correspond to that of the additive genetic variance component (${{\widehat{\sigma }}^2}_a$)

Traits d	Narrow‐sense heritabilities
	Normandin site		Watford site
	ABLUP	GBLUP	ABLUP	GBLUP
Recovery	0.29 (0.12)***	0.22 (0.10)***	‐	‐
Relative resilience	0.29 (0.12)***	0.23 (0.10)***	‐	‐
Resilience	0.24 (0.11)**	0.20 (0.10)**	‐	‐
Resistance	0.13 (0.10)*	0.16 (0.10)*	0.22 (0.11)**	0.25 (0.11)**
Height	0.44 (0.14)***	0.47 (0.12)***	0.45 (0.13)***	0.46 (0.12)***
DBH	0.44 (0.14)***	0.45 (0.12)***	0.31 (0.13)**	0.32 (0.12)***
Acoustic velocity	0.46 (0.14)***	0.41 (0.12)***	0.64 (0.14)***	0.60 (0.11)***
Wood density	0.44 (0.14)***	0.42 (0.12)***	0.48 (0.14)***	0.41 (0.12)***
EW density	0.50 (0.14)***	0.44 (0.12)***	0.47 (0.14)***	0.41 (0.12)***
LW density	0.13 (0.10)	0.16 (0.10)*	0.33 (0.13)***	0.42 (0.12)***
EW area	0.37 (0.14)***	0.37 (0.12)***	0.25 (0.12)**	0.28 (0.11)***
LW area	0.36 (0.13)***	0.46 (0.13)***	0.31 (0.12)***	0.33 (0.11)***

^a Narrow‐sense heritability was calculated from Equation 2.

^b The model fitted is described in Equation 1.

^c Levels of statistical significance: * p < 0.05, ** p < 0.01, *** p < 0.001.

^d See Table 1 for a full description of traits.