甘蔗有性杂交受自然条件的影响很大。即使海南甘蔗育种场是我国比较理想的甘蔗有性杂交基地,也往往由于各年降雨量和降雨时间的不同,而出现甘蔗开花年好年坏的情况,开花好的年景,由于杂交计划的局限,甘蔗花穗不能充分利用进行杂交;开花不好的年景,杂交任务难于完成,出现甘蔗杂交种子供不应求的现象,直接影响全国甘蔗选育种工作。为了更多利用每年的甘蔗花穗进行杂交,充分利用 Sexual crossings of sugarcane are greatly influenced by natural conditions. Even if Hainan sugarcane breeding farm is the ideal sexual hybridization base of sugarcane in our country, it is often because of the different rainfall and rainfall time in each year, Limited, sugarcane spikes can not make full use of hybridization; poor flowering years, difficult to complete the task of hybridization, sugarcane hybrid seed appears in short supply, a direct impact on the national selection of sugarcane breeding work. In order to make more use of annual sugar cane spike hybridization, make full use of