Characteristics of Fertility Transition Response to the Cumulative Effective Low Temperature in a Two-Line Male Sterile Rice Cultivar

Rice

Table 1 Fertility results in response to light-temperature combinations for the CSITs of H93S and PA64S

Daily photoperiod time (h)	Temperature (°C)	H93S		PA64S
Daily photoperiod time (h)	Temperature (°C)	PFP (%)	SSP (%)	PFP (%)	SSP (%)
11.5	28.0	0	0	0	0
	24.0	0.01 ± 0	0	78.31 ± 5.27	39.54 ± 7.32
	23.0	50.51 ± 5.53	17.84 ± 4.08	60.37 ± 4.86	22.42 ± 2.94
12.5	28.0	0	0	0	0
	24.0	0	0	0.34 ± 0.29	0
	23.0	8.21 ± 1.81	2.54 ± 0.92	25.25 ± 4.61	15.89 ± 0.22
13.5	28.0	0	0	0	0
	24.0	0	0	0	0
	23.0	0	0	1.19 ± 0.49	0.24 ± 0.22
	22.5	27.27 ± 2.47	12.22 ± 2.84	31.89 ± 10.46	16.93 ± 3.89
14.5	28.0	0	0	0	0
	24.0	0	0	0	0
	23.0	0	0	0	0
	22.5	8.91 ± 3.55	3.72 ± 1.40	16.94 ± 4.11	9.85 ± 1.39

The temperature and daily photoperiod were selected according to the Ministry of Agriculture Standard of China (NY/T1215–2006), with modifications. (The modifications included the following additional treatments: an 11.5 h photoperiod at 23.0 °C, a 12.5 h photoperiod at 22.5 °C, a 13.5 h photoperiod at 22.5 °C, and a 14.5 h photoperiod at 22.5 °C.) Abbreviations are: PFP: pollen fertility percentage; SSP: self-seed setting percentage. All data are expressed as the means ±the standard errors