Table 2.

Partial Eta squared (η²) values for the individual and interactive effects of planting dates (P) and genotypes (G) on seedling, vegetative, morphology, and yield-related parameters of diverse sorghum lines with variable tolerance to early-season low temperatures, evaluated across three planting dates in West Texas.

	Seedling				Plant morphology											Yield related
	FGP	VGR	SBM	SCC	ACC	DTA	NOL	HGT	BST	NDT	SDM	PDL	PNL	PNW	PNA	VBM	TBM	PWT	pHI	GRY
P	47a	60	91	87	5	94	53	16	63	28	32	0	8	46	37	40	45	23	54	47
G	33	41	30	49	55	70	90	91	61	43	63	26	80	56	63	48	57	57	33	42
P * G	24	16	36	23	13	55	61	32	36	24	29	15	38	31	38	20	36	46	20	34
Means	75	2.5	3.3	377	638	69	16	129	0.8	0.5	1.8	8.6	29	5.4	158	69	142	73	0.39	4.5
S.E	5.01	.13	.17	15.2	20.1	4.6	1.05	11.1	.02	.02	.12	1.5	3.3	.47	8.7	3.4	12.2	5.2	.04	.12

Values are expressed in percentages as proportion of variance in the assessed characteristics explained by the treatments.

P planting date, G genotype, FGP (%) final germination percent, VGR vigor rating, SBM (g) 30-days old seedling dry biomass, SCC (µmolm⁻²) 30-days old seedling chlorophyll content, ACC (µmolm⁻²) anthesis chlorophyll content, DTA (days) growing degree days to anthesis, NOL number of leaves, HGT (cm) plant height, BST basal tillers, NDT nodal tillers, SDM (cm) stem diameter, PDL (cm) peduncle length, PNL (cm) panicle length, PNW (cm) panicle width, PNA (cm²) panicle area, VBM (g) vegetative aboveground dry biomass, TBM (g) total aboveground dry biomass, PWT (g) panicle weight, pHI panicle harvest index, GRY (ton/ha) grain yield, SE standard error.

^aIndicates using Cohen, 1988, η² ≤ 1% is considered small effect; 0.01 ≤ η² ≤ 6% is considered medium effect; and η² ≥ 14% is considered a large effect.