Table 4 Variance component to error variance ratios for main effects of cambial age spline and year and for interaction terms cambial age spline by family for variables: ring width and ring density, latewood density and earlywood density

PT1

spl(CA)

14.01^*

0.114 ns

2.41 ns

0.000 ns

Y

0.316^***

0.043^**

0.077^**

0.033^**

spl(CA) × F

0.013^***

0.002^*

0.003^*

0.000 ns

PT2

spl(CA)

4.670^*

1.604^*

0.235 ns

0.235 ns

Y

0.726^***

0.084^***

0.026^**

0.026^**

spl(CA) × F

0.020^***

0.008^***

0.005^***

0.005^***

PT3

spl(CA)

21.58^*

9.25^*

0.394 ns

1.94 ns

Y

1.156^*

0.479^*

0.062^*

0.106^*

spl(CA) × F

0.054^***

0.002 ns

0.004 ns

0.004^**

PT4

spl(CA)

26.68 ns

0.82 ns

1.012 ns

7.069 ns

Y

1.30^*

0.094^*

0.203^**

0.576^*

spl(CA) × F

0.053^***

0.34^***

0.006^**

0.003^*