Table I.

Abbreviations and units of all measured growth traits, categorized per level of organization within the plant, and the mean values for the parents of the cross PI603228 and Ciae4

Abbreviation	Trait	Unit	Mean PI603228	Mean Ciae4
Whole plant
RGR1a	Relative growth rate (week 1)	g g−1 d−1	0.247	0.264
RGR2a	Relative growth rate (week 2)	g g−1 d−1	0.215	0.233
RGRtotala	Relative growth rate (week 1 + 2)	g g−1 d−1	0.231	0.249
LAR	Leaf area ratio	m2 gplant−1	13.1	13.7
ULR	Unit leaf rate	g m−2 d−1	16	17
RGRdryb	Relative growth rate	mg g−1 d−1	94	123
Plant mass	Final total plant mass (dry weight)	g	0.340	0.280
LMF	Leaf mass fraction	gleaf gplant−1	0.42	0.44
SMF	Stem mass fraction	gstem gplant−1	0.22	0.19
RMF	Root mass fraction	groot gplant−1	0.35	0.37
Whole shoot
No. leaves	No. of leaves	–	15.3	8.8
Areatotal	Total leaf area	cm2	46.5	38.0
Leaf mass	Total leaf mass	g	0.143	0.123
Shoot mass	Total shoot mass (dry weight)	g	0.221	0.176
D%L	Dry-matter percentage leaf	%	18.2	15.7
D%S	Dry-matter percentage stem	%	12.7	12.0
SLA	Specific leaf area	m2 kgleaf−1	32.6	30.8
RTR	Relative tillering rate	d−1	0.200	0.160
RLaR	Relative leaf appearance rate	d−1	0.150	0.121
Whole leaf
LER	Leaf elongation rate	mm h−1	1.30	1.66
LED	Leaf elongation duration	h	132	133
Length	Final leaf length	mm	147	179
Width	Maximal leaf width	mm	4.5	4.6
Arealeaf3	Area of lamina of leaf 3	mm2	546	647
Sheath	Final sheath length	mm	26.5	37.3
Subleaf
Cell	Maximal cell length	μm	178	215
No. cells	No. of cells	–	830	838
Cell production	Cell production rate	cells day−1	175	185
Other
Seed	Seed mass	mg	24	9
DMR	Dry-matter percentage root	%	7.3	7.0

^aRGR calculated on fresh-weight basis.

^bRGR calculated on the basis of dry-weight measurement of the seed mass and the final plant mass.