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本文报道了１９９８年度云南省甘蔗研究所光周期诱导甘蔗开花及杂交利用结果。本研究以４月１日和６月１日两种起始处理时间，１２ｈ２５ｍｉｎ和１２ｈ１５ｍｉｎ两种固定日长处理，于１０月１日起日递减光３０ｓ至抽穗时止的光周期诱导技术分别对７个难花亲本和７个常用亲本进行了开花诱导。结果表明：在不同的光周期处理下，粤糖５７／４２３、Ｃｏ４１９、闽糖７０／６１１、罗汉蔗等４个难花亲本被诱导开花；７个常用亲本全部孕穗或开花，并提早花期３－４个月。利用诱导开花亲本分别与割手密（Ｓ．ｓｐｏｎｔａｎｅｕｍ）、斑茅（Ｓ．ａｒｕｎｄｉｎａｃｅｕｍ）、滇蔗茅（Ｅ．ｒｏｃｋｉ）、芒（Ｍ．ｓｉｎｅｎｓｉｓ）、河八王（Ｎ．ｐｏｒｐｈｙｒｏｃｏｍａ）等野生种成功地进行杂交或远缘杂交，获得大量实出苗，为野生资源的利用及优良品种的选育奠定了基础。
This paper reports the results of blossoming and hybridization of sugarcane induced by photoperiod in Yunnan Sugarcane Research Institute in 1998. In this study, two kinds of fixed daily treatments of two initial treatments, ie, 12h25min and 12h15min were performed on April 1 and June 1, Seven poor parents and seven common parents were flowering induced. The results showed that under the different photoperiod treatments, four difficult parents were induced to flowering, including 57/423, Co419, 70/611, and 70 sugarcane, respectively. All seven common parents all had booting or flowering, and early flowering 3 -4 months. By using the methods of inducing the flowering parents to breed wild plants such as S.spontaneum, S.arundinaceum, E.rocki, M.sinensis and N.porphyrocoma Successful hybridization or distant hybridization, access to a large number of real seedlings, for the utilization of wild resources and breeding of good varieties laid the foundation.