**, ***Significant at 1% and 0.1% level by ANOVA, respectively.
Figure legends
Figure 1 A diagram showing multiple regression of yield advantage in IR64+qEMF3 on yield components, along with the correlation between explanatory variables for the data obtained in seven seasons of Nay Pyi Taw. Values with the single head arrows are standardized multiple regression coefficients. *, P<0.05; ns, not significant.
Figure 2 Relationship between average daily maximum temperatures during heading and percentages of filled grains. Bars indicate means of percentages of filled grains ± standard deviation.
Figure 3 Daily flowering pattern and change in air temperature (a), and changes in percentages of spikelet sterility in each time period and on a single day (b) on 22 April 2018. Bars shown in blue, green, purple, and black colors indicate that the spikelets opened before 0700H, between 0700H-0830H, 0830H-1000H, and after 1000H, respectively. In B, color bars for IR64 and white bars with color outline for IR64+qEMF3 are shown.