《Table 2.Response of spikelet fertility of indica, japonica and indica-japonica hybrid rice varietie

  提示：宽带有限、当前游客访问压缩模式

本系列图表出处文件名：随高清版一同展现

《Research Progress on Heat Stress of Rice at Flowering Stage》

1. 获取 高清版本忘记账户？点击这里登录

1. 下载图表忘记账户？点击这里登录

Relative spikelet fertility rate（%）=Spikelet fertility rate under high temperature（38oC）/Spikelet fertility rate under normal temperature（32oC）×100.Data are provided by Rice Production and Physiology Group of China National Rice Research Institute，

Rice variety innovation leads to heat resistance differences among different rice variety types.The Rice Production and Physiology Research Group in China National Rice Research Institute evaluated the heat tolerance of 116 rice varieties which were dominant planted in the middle and lower reaches of the Yangtze River region，and the results indicated that indica-japonica hybrid rice presents higher heat resistance compared to indica and japonica rice in general，but there are individual differences among different varieties in the three types（Table 2）.The difference in spikelet flowering habit is an important factor for the better heat resistance in indica rice than in japonica rice with spikelet flowering generally before 12:00 in indica rice，and after 12:00 in japonica rice（Fig.6）.The daily temperature is typically higher during the spikelet flowering period for japonica rice，resulting in severe spikelet sterility，which suggests that early flowering cultivar type could reduce the high temperature damage.