Heat resistance during flowering was evaluated with 100 hybrid combinations as materials. The rice plants were subjected to heat stress at 38℃ for 3 days as 50% spikelets flowered. Based on relative spikelet fertility rate, they were divided into heat tolerant combinations, semiheat tolerant combinations and heat sensitive combinations. Therefore, Y Liangyou 646, Guangzhan 634S×R558, Yixiang 5979, Y Liangyou 2 and Y Liangyou 896 are heat tolerant combinations, whereas Ⅱyou 838, Fengyou 199 and Jingchuyou 37 are heat sensitive combinations. Analysis of origin of combinations with different heattolerance indicated that most hybrid combinations derived from the same female parent showed similar heat resistance. It indicated female parent played an more important role in heat tolerance of hybrid rice.
HU Shengbo, ZHANG Yuping, ZHU Defeng*, LIN Xianqing , XIANG Jing
. Evaluation of Heat Resistance in Hybrid Rice[J]. Chinese Journal OF Rice Science, 2012
, 26(6)
: 751
-756
.
DOI: 10.3969/j.issn.10017216.2012.06.017
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