Table 1.

Phenotypic (above the diagonal) and genetic (below the diagonal) correlations for photosynthetic characteristics and wood traits in the linkage mapping population (n = 300)

	Pn	Cond	Ci	Trm	D	H	V	MFA	Hol	α-cel	Lig
Pn	1	0.624**	0.066**	0.374**	0.330**	0.322**	0.310**	−0.109**	−0.011	0.007	−0.086**
Cond	0.626**	1	0.729**	0.732**	0.101**	0.075*	0.058	−0.042	0.016	−0.035	−0.082*
Ci	0.067	0.738**	1	0.756**	−0.079*	−0.098**	−0.107**	0.041	0.047	−0.032	−0.060
Trm	0.376**	0.739**	0.770**	1	0.128**	0.114**	0.089**	0.044	0.038	0.027	0.007
D	0.332**	0.101	−0.080	0.130*	1	0.722**	0.938**	−0.035	0.026	0.147**	−0.066*
H	0.325**	0.075	−0.099	0.118*	0.732**	1	0.772**	−0.064	0.061	0.155**	−0.025
V	0.312**	0.036	−0.108	0.091	0.940**	0.776**	1	−0.040	0.033	0.144**	−0.058
MFA	−0.114*	−0.043	0.047	0.050	−0.037	−0.070	−0.043	1	−0.096**	−0.180**	0.151**
Hol	−0.023	0.035	0.084	0.074	0.050	0.130	0.064	−0.137*	1	0.200**	−0.080*
α-cel	0.008	−0.038	−0.030	0.027	0.155**	0.164**	0.153**	−0.209**	0.455**	1	−0.367*
Lig	−0.088	−0.084	−0.063	0.006	−0.068	−0.027	−0.060	0.160**	−0.164*	−0.398**	1

**P ≤ 0.01; *P ≤ 0.05. P-value shows the credibility of correlation.

Pn, photosynthetic rate; Cond, conductance to H₂O; Ci, intercellular CO₂ concentration; Trm, transpiration rate; MFA, microfiber angle; H, tree height; D, diameter at chest height; V, stem volume; Hol, holocellulose; α-cel, α-cellulose; Lig, lignin content.