Radial variations of broad-sense heritability in wood properties and classification of load–deflection curves in static bending for six half-sib families of Chamaecyparis obtusa

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 5 Boundary between juvenile and mature wood based on radial variation of latewood tracheid length

Family ID	Sample tree	b_1j	Boundary annual ring number
H2	1	1.42	24
	2	– 0.39	22
	3	0.79	24
K4	1	1.22	24
	2	– 0.43	22
	3	– 1.22	22
M5	1	0.84	24
	2	– 0.33	23
	3	2.93	25
S	1	2.53	25
	2	0.81	24
	3	0.88	24
S2	1	– 0.94	22
	2	– 1.69	21
	3	– 1.89	21
T2	1	– 1.81	21
	2	– 3.21	19
	3	0.49	23
Broad-sense heritability			0.51

b_1j, random-effects parameter of the jth family
Tracheid length at every annual ring was estimated by Model II with random-effects parameter b_1j
The annual ring number at the boundary was regarded as the annual ring number at which the annual increment of tracheid length became less than 1%