【摘要】 本文报道了 1999年度云南省甘蔗研究所光周期诱导难开花甘蔗亲本开花的研究结果。本研究以 4月 1日和 6月 1日两种起始处理时间 ,12小时 2 5分和 12小时 15分两种固定日长处理 ,于10月 1日起递减光 30秒至抽穗时止的光周期诱导技术分别对 9个难开花亲本进行了开花诱导研究。结果 :在高纬度、高海拔的开远地区 ,首次诱导了热带种克林斯它林那、越南牛蔗开花 ,4 8Mouna、拔地拉孕穗 ;另外 ,粤糖 57/ 4 2 3、Co4 19、闽糖 70 / 6 11在 1998年的基础上 ,继续被诱导开花 ,且始花期提早 ,平均抽穗率提高。本文还讨论了在光周期处理一致的条件下 ,温度可能是影响难开花亲本开花的主要因素更多还原

【Abstract】 This article reports the research results of the photoperiod inducement flowering of shy-flowering sugarcane parents in Sugarcane Research Institute, Yunnan in 1999. The experiments used 9 shy flowering parents as entry, started on April 1 and June 1 respectively, with two kinds of daylight duration treatments of 12 h 25 min and 12 h 15 min. From October 1, both daylight treatments were reduced by 30 s every day until tassel. The results showed that two varieties had been induced flowering for the first time, which were noble cane Crystalina and Yue Nan Niu Zhe, two varieties had been induced pregnant for the first time, which were noble cane Badila and 48Mouna, at Kaiyun of high latitude and high sea level. Besides, three varieties had been induced flowering in both years, which were Yuetang 57/423、Co419 and Mintang 70/611. Morever their first heading dates were earlier than usual, average earing rate had been raised. This article suggests that temperature be possible main factor affecting shy flowering parents flowering under condition of the same photoperiod treatment.更多还原