Table 2.

Comparison of the fitness traits of different genotypes with and without competition

Fitness traits	With competition (RR/SS or RS/SS = 4:4)				Monoculture (eight plants per pot)
	RR	RS	SS	P value	RR	RS	SS	P value
Germination*
Germination time, d	1.1 ± 0.1(a)	1.4 ± 0.2(a)	1.2 ± 0.2(a)	ND	1.2 ± 0.1(a)	1.0 ± 0.0(a)	1.2 ± 0.1(a)	ND
Vegetative growth
Plant height, cm†	37.1 ± 2.4(a)	50.1 ± 4.1(b)	70.1 ± 3(c)	<0.001	40.9 ± 1.7(a)	50.8 ± 3.6(b)	70.6 ± 2.4(c)	<0.001
RGR, fold‡	7.3 ± 0.8(a)	7.5 ± 0.8(a)	12.9 ± 0.9(b)	0.006	9.4 ± 0.7(a)	9.4 ± 0.9(a)	15.9 ± 0.9(b)	0.0205
Biomass, g	4.2 ± 1.1(a)	9.9 ± 4.3(a)	26.7 ± 4.0(b)	<0.001	13.5 ± 2.8(a)	18.3 ± 5.1(ab)	18.0 ± 2.2(b)	0.0457
Reproductive growth
Flowering time, d	65.1 ± 1.5(a)	61.6 ± 1.4(a)	73.4 ± 2.8(b)	0.011	63.1 ± 1.2(a)	66.6 ± 2.3(ab)	74.4 ± 2.1(b)	0.0349
Seed production, g	0.9 ± 0.3(a)	1.9 ± 0.6(a)	3.7 ± 0.6(b)	0.001	3.0 ± 0.5(a)	2.2 ± 0.7(ab)	2.0 ± 0.2(b)	0.0493
1,000 seed weight, g	0.54 ± 0.03(a)	0.59 ± 0.04(a)	0.61 ± 0.03(a)	ND	0.60 ± 0.02(a)	0.62 ± 0.02(a)	0.59 ± 0.02(a)	ND

ND, no statistical difference. Letters (a) and (b) indicate statistically similar groups. Different letters indicate the groups are statistically different from one another.

^*Germination assays were performed on agar in 48-well plates before transplant. Individual plant identity was maintained throughout the experiment, and these values represent only the individuals represented here; however, no difference in germination time was observed between the genotypes in the entire experiment, which represented 1,440 seeds from three independent lines (480 seeds per line).

^†Six weeks after the transplanting time point.

^‡RGR is calculated as (plant height at harvest − plant height at transplanting)/plant height at transplanting.