(a).

Traits	Plant	Genotype (d.f. = 11)	Replication (d.f. = 2)	Error (d.f. = 22)	Traits	Plant	Genotype (d.f. = 11)	Replication (d.f. = 2)	Error (d.f. = 22)
Bark diameter (mm)	Base	10.70∗∗	0.70	0.99	Number of trapezoid section−1	Base	135.85∗∗	67.86	27.92
	Middle	6.03∗∗	1.02	0.35		Middle	61.84∗∗	18.11	17.41
	Top	1.80∗∗	0.10	0.18		Top	509.87∗∗	11.11	14.51
	Overall	3.80∗∗	0.09	0.02		Overall	62.34∗∗	6.30	3.58
Bark thickness (mm)	Base	0.57∗∗	0.12	0.05	Total bundle area (sqmm) section−1	Base	161.95∗	94.44	51.57
	Middle	0.49∗∗	0.01	0.02		Middle	97.50∗∗	9.19	15.85
	Top	0.19∗∗	0.002	0.01		Top	14.40∗∗	2.38	2.00
	Overall	0.19∗∗	0.01	0.01		Overall	46.60∗∗	6.49	5.24
Area of a trapezoid (sqmm)	Base	0.03∗	0.01	0.008	Bundle layer trapezoid−1	Base	4.22∗∗	0.886	0.24
	Middle	0.02∗∗	0.001	0.004		Middle	1.95∗∗	0.063	0.17
	Top	0.01∗∗	0.004	0.001		Top	1.06∗∗	0.307	0.06
	Overall	0.01∗∗	0.001	0.001		Overall	0.97∗∗	0.27	0.05