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Responses of Yield Characteristics to High Temperature During Flowering Stage in Hybrid Rice Guodao 6

作者：

Guanfu Fu;Longxing Tao;Jian Song;Wang Xi;Yingxin Zhang;Shifeng Chen

单位：

State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, Chin;State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China;State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China

关键词：

hybrid rice;high temperature stress;high temperature injury;spikelet fertility;seed settin

摘要：

By sowing at different dates during 2005 and 2006 both in paddy fields and greenhouse, a super hybrid rice combination Guodao 6 and a conventional hybrid rice combination Xieyou 46 (as control) were used to analyze the differences in heat injury index, seed setting rate, grain yield and its components. Guodao 6 showed more stable yield and spikelet fertility, and lower heat injury index than Xieyou 46. Further studies indicated that the spikelet sterility is positively correlated with the average daily temperature and the maximum daily temperature, with the coefficients of 0.8604 and 0.9850 (P<0.05) respectively in Guodao 6. The effect of high temperature injury on seed setting caused by maximum daily temperature was lower than that by average daily temperature during the grain filling stage.

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Responses of Yield Characteristics to High Temperature During Flowering Stage in Hybrid Rice Guodao 6

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