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Table 2 Growth traits and wood properties in the progenies of Cryptomeria japonica plus trees

From: Genetic gains in wood property can be achieved by indirect selection and nondestructive measurements in full-sib families of Japanese cedar (Cryptomeria japonica. D. Don) plus tree clones

Trait unit

H (m)

HDBH (cm)

DMOE (GPa)

BDmean (g/cm3)

BD1 (g/cm3)

BD2 (g/cm3)

BD3 (g/cm3)

SWV (m/s)

PP (mm)

Mean

12.4

17.2

4.85

0.316

0.343

0.312

0.305

2667

18.9

Max.

18.2

32.9

7.85

0.416

0.488

0.439

0.409

3338

25.5

Min.

4.8

5.2

1.69

0.248

0.256

0.217

0.229

1870

13.0

S.D.

2.5

4.7

0.92

0.026

0.036

0.030

0.031

238

2.3

CV (%)

20.2

27.1

19.0

8.6

10.6

9.7

10.3

8.9

12.2

h2

0.168

0.145

0.353

0.503

0.380

0.488

0.385

0.361

0.432

ΔGx

0.4

0.7

0.32

0.013

0.014

0.015

0.012

86

1.0

Relative genetic gain (%)

3.4

4.0

6.7

4.1

4.0

4.7

3.9

3.2

5.2

n

548

549

547

479

488

488

488

545

549

  1. Number of families =45
  2. H tree height, DBH diameter at breast height (1.3 m above ground), DMOE dynamic modulus of elasticity, BDmean the average basic density of disks, BD1 the basic density of the region from the 1st to 5th rings on the pith side, BD2 the basic density of the region from the 6th to 10th rings on the pith side, BD3 the basic density of the region from the 11th to 15th rings on the pith side, SWV stress wave velocity, PP Pilodyn penetration depth, S.D. standard deviation, CV coefficient of variance, h2 narrow-sense heritability, ΔGx genetic gain obtained by direct selection at selection intensity i =1, n number of the progenies measured for each trait