Table 2.

Summary of the mixed model for volatile terpene content found in the primary needles of P. pinaster seedlings belonging to 17 open-pollinated families cultivated at two levels of phosphorus availability, and induced by application of MeJa

		Monoterpenes			Sesquiterpenes			Total volatile terpenes
	df (F)	% VC	F/χ2	P value	% VC	F/χ2	P value	% VC	F/χ2	P value
Family (G)		20.5	32.5	0.000	12.6	15.2	0.000	20.8	33.3	0.000
G×P		0.0	0.0		0.0	0.0			0.0	0.0
G×MeJa		0.0	0.0		0.0	0.0			0.0	0.0
G×P×MeJa		0.0	0.0		0.0	0.0			0.0	0.0
Residual		79.5			87.4			79.2
Block	3, 3		0.7	0.601		3.9	0.146		0.9	0.524
P	1, 3		1.3	0.345		2.2	0.232		1.7	0.286
MeJa	1, 6		0.4	0.578		17.4	0.006		1.2	0.323
P×MeJa	1, 6		0.2	0.698		0.0	0.999		0.2	0.670

The family effect (G) and derived interactions are random effects, and the variance components (VC, %) and corresponding likelihood ratio significance tests (χ²) are shown. Phosphorus availability (P) and methyl jasmonate (MeJa) induction of defences are fixed effects, and the F values and corresponding df are shown. Bold values are significant at α <0.05.