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马铃薯无论在南方或北方,一个品种连续栽培数年之后,种性便会退化,产量随之降低;若通过有性杂交,不但可以更新退化的种薯,还可以选育出高产优质的新品种。有性杂交可分为品种内杂交、品种间杂交和远缘杂交。欲行有性杂交育种,则首先对于马铃薯花之构造和各品种的开花习性,以及杂交的技术、实生苗的培育和杂交后代的定向选择均须有深确的认识,而后实践,则比较容易成功。现据我们几年来在马铃薯有性杂交育种方面的一些研究,简报如下。
Potato, whether in the south or the north, has been degraded for many years after being cultivated for several years, and the yield will be reduced. If sexual crosses are made, not only the degraded seed can be renewed, but also new varieties with high yield and good quality can be bred . Sexual hybrids can be divided into varieties within the hybrid, cross between varieties and distant hybridization. Sex sexual breeding, the first of all for the flowering of potato flower habits and varieties, as well as hybridization techniques, seedling breeding and hybrid offspring orientation choice must have a deep understanding, and then practice is easier success. According to our research on potato sexual crossbreeding in recent years, the briefing is as follows.