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1.本文包括两部分,即甘薯开花生物学和有性杂交技术的研究及几个杂交系的三年试验结果。2.当给以8小时短日条件,甘薯植株比在福州自然条件下的提早开花10——25天。但因品种、处理时期及环境条件而不同。3.根据四年来杂交一千余朵花的结果,甘薯杂交成功率约为45%。混合授粉及重复授粉似乎有增加杂交成功率的趋势。4.根据三年试验结果,发现二个杂交系,即5414——5和5414——8,在块根产量上比亲本胜利百号及黄薯都高。在蔓的产量上,杂交系亦比较亲本为优。而且这两个杂交系似乎比亲本具有较大适应不同环境条件的能力。5.关于选择亲本组合的问题曾加以讨论。米丘林所提出关于选择远地亲本的原则,对于这个问题的解决具有指导的作用。许多杂交系尚在继续研究中。
1. This paper consists of two parts, namely, the research of flowering biology and sexual hybridization of sweet potato and the results of three years of several hybrid lines. 2. When given 8 hours short day conditions, sweet potato plants flowering 10 to 25 days earlier than in Fuzhou under natural conditions. However, due to variety, handling time and environmental conditions and different. 3. According to the results of more than a thousand flowers in four years of hybridization, sweet potato hybridization success rate of about 45%. Mixed pollination and repeated pollination seem to have an increased tendency to hybridize. 4. According to the results of the three-year experiment, two hybrid lines, 5414-5 and 5414-8, were found to be higher in root tuber yield than the parent Victory 100 and the yellow potato. In the vine yield, the hybrid system is also better than the parent. Moreover, both crosses seem to have a greater ability to adapt to different environmental conditions than their parents. 5. The question of choosing a parental combination was discussed. Michurin’s principle of choosing remote parents has a guiding role in solving this problem. Many hybrids are still under study.