Table 1.

Effect of temperature during seed development on seed germination and seed vigour of two soybean cultivars (adapted from Spears et al. 1997)

	Temperature regime and duration*
	27/22 °C		33/28 °C		38/33 °C
	R5-PM	R5-R8	R5-PM	R5-R8	R5-PM	R5-R8
Germination (%)
McCall†	100	100	98	100	94	63
Hutchenson	100	100	99	98	57	14
Germination (%) after accelerated ageing*‡
McCall†	98	100	73	86	8	7
Hutchenson	98	95	43	86	2	1
Conductivity‡ (μS/cm/g)
McCall†	5·5	5·4	7·0	6·3	16·1	23·9
Hutchenson	6·5	6·2	9·1	10·6	29·8	35·9

^*Day/night temperatures with 10 h at the day temperature; R5=beginning of seed fill; PM=physiological maturity; R8=harvest maturity.

^†Soybean cultivars; McCall=indeterminate growth habit; Hutchenson=determinate growth habit.

^‡Seed vigour tests.