Table 1. Panicle characters after high temperature treatment.

Cultivars	Treatment	Panicle weight(g)	Spikelet number	The number of differentiated spikelet	The proportion of degenerated spikelet (%)	Spikelet fertility (%)	Grain weight (mg)	Glume length (mm)	Glume width (mm)
HHZ	32  °C	3.6 ± 0.4	235.0 ± 20.0	335.3 ± 20.5	30.0 ± 1.7	83.0 ± 2.0	18.5 ± 0.3	8.7 ± 0.2	2.5 ± 0.0
	40  °C	2.4 ± 0.3**	182.7 ± 11.2**	303.3 ± 10.1	39.7 ± 5.3	78.5 ± 1.3**	17.0 ± 0.3**	7.8 ± 0.1**	2.2 ± 0.1**
IR36	32  °C	3.1 ± 0.4	183.3 ± 7.6	264.7 ± 13.8	30.7 ± 1.5	81.5 ± 1.8	20.5 ± 0.3	8.1 ± 0.3	2.5 ± 0.0
	40  °C	1.0 ± 0.1**	85.0 ± 13.5**	176.7 ± 17.6**	51.4 ± 9.3**	73.5 ± 1.1**	16.0 ± 0.1**	6.8 ± 0.2**	2.3 ± 0.1**

Notes.

* and ** indicate significance differences between the control (32  °C) ang high (°C) temperature treatments (one-tailed Student’s t-test).

^*P < 0.05.

^**P < 0.01.