抽穗开花期高温对东北粳稻花粉育性及结实率的影响

Hunan Agricultural Sciences(2012)

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Abstract
以34份东北粳稻和对照耐热品种996、热敏感品种4628为材料,研究了抽穗开花期高温对其花粉育性和结实率的影响。结果表明:在花粉育性上,G 19、北04-20、东稻1号、龙粳5号下降较小,东农03-33、东农03-44、长白9号、龙粳21号、东稻2号、绥粳4号、长白10号、平粳8号下降较大;在结实率上,USSR 5、长白9号、长粒香、东稻2号、东农03-33、东农415-2、东农9213、合江195、吉粳3、千重浪2号、沈禾57号下降较小,08M8、G19、敦内稻、东稻1号、吉粳2、平粳8号下降较大;高温胁迫后结实率大于996的有东农03-33、USSR 5、吉粳3、东稻2号、东农415-1、合江195,其中单株产量合江195>东农415-1>东农03-33>USSR 5>996。并认为以绝对结实率作为水稻耐热性筛选指标较好。
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Key words
pollen fertility,japonica rice,heading stage,high temperature stress,seed setting rate
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