水稻光温敏核不育系“635s”开花习性的观察

摘要

观察结果表明：光温敏核不育系“635s”单株的开花历期平均为15.5d，开花高峰期出现在抽穗后第5～10d；在盛花期内全天6∶00～19∶00均可开花，且在11∶00～13∶00出现一个开花高峰，有时在7∶00左右还出现另一个开花高峰；“635s”的柱头外露率达rn73.7%，异交结实率达59.1%，颖花张开时间为2.13～3.25h。%The observation results show that the single-plant of photo-thermo-sensitive genic sterile line “635s” has long flowering duration (15.5d on average) and obvious peak flowering period (on the 5th～10th day after heading); during peak florescence, the glume can flower at 6∶00～19∶00 in a day, and one peak flowering occurs at 11∶00～13∶00， 　sometimes 　the 　other 　peak flowering appears at 7∶00 or so; the rate of outshowing stigma of “635s” is 73.7%, its setting rate of outcrossing is 59.1%， and the opening time of the glume is 2.13～3.25h.