Table 2.

Leaf and spikelet plastochrons, derived from the slopes of the bilinear relationships between number of primordia (leaves+spikelets) and thermal time (whose coefficients of determination are also included) for each of the NILs and the wild-type Paragon, A_P+B_P+D_P (as well as for the average of all NILs with the same dose of Ppd-1a alleles) in both growing seasons

Genotype	First growing season			Second growing season
	Leaf plastochron (ºCd per leaf)	Spikelet plastochron (ºCd per spikelet)	R 2	Leaf plastochron (ºCd per leaf)	Spikelet plastochron (ºCd per spikelet)	R 2
AP+BP+DP	48.8 ± 1.7	16.3 ± 1.4	0.94	54.3 ± 1.4	26.9 ± 1.2	0.95
A GS+ BP+DP	56.0 ± 0.6	13.9 ± 0.6	0.96	55.2 ± 1.9	19.9 ± 2.0	0.89
AP+BCS+DP	46.5 ± 1.5	14.0 ± 1.5	0.94	57.1 ± 1.2	24.2 ± 1.5	0.94
AP+BS+DP	53.5 ± 0.9	13.9 ± 0.8	0.95	53.7 ± 1.3	22.7 ± 1.5	0.93
AP+BR+DP	47.7	16.3	0.99	59.1 ± 1.4	20.7 ± 1.4	0.93
AP+BP+DS	54.4 ± 0.9	13.7 ± 0.8	0.96	55.6 ± 1.2	20.4 ± 1.4	0.95
${\overline{\text{X}}}_{\text{Single}}$	51.6 ± 1.9	14.3 ± 0.5		56.1 ± 0.9	21.6 ± 0.8
A GS +B CS+DP	64.5 ± 0.8	15.3 ± 0.8	0.95	53.6 ± 1.3	25.0 ± 1.5	0.95
A GS+BP+DS	46.1 ± 1.5	13.6 ± 1.4	0.88	59.4 ± 1.4	23.1 ± 1.4	0.95
AP+BCS+DS	60.2 ± 1.0	13.5 ± 1.0	0.95	52.7 ± 1.6	20.9 ± 1.8	0.93
A GS +B S+DP	54.6 ± 1.3	14.6 ± 1.2	0.94	57.5 ± 1.4	23.2 ± 1.9	0.90
AP+BS+ DS	59.5 ± 0.7	13.9 ± 0.6	0.96	57.7 ± 1.6	20.0 ± 1.7	0.94
${\overline{\text{X}}}_{\text{Double}}$	56.8 ± 3.3	14.3 ± 0.3		56.2 ± 1.3	22.4 ± 0.9
A GS +B CS +D S	52.1 ± 0.8	13.8 ± 0.7	0.93	71.5 ± 1.8	22.9 ± 2.1	0.90
A GS +B S +D S	54.2	16.7	0.87	61.2 ± 1.3	22.5 ± 1.3	0.96
${\overline{\text{X}}}_{\text{Triple}}$	53.1 ± 1.1	15.3 ± 1.5		66.4 ± 5.1	22.7 ± 0.2

Values indicate the mean ±SE, with the exception of the two genotypes that were grown in a single repetition in the first growing season (see the Materials and methods). Bold values indicate that differences in plastochrons between NILs and Paragon were larger than the differences between their SEs. The R² values were always highly significant (P<0.001).