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马铃薯的常规杂交育种目前遇到两大障碍:一是由于病毒病的浸染通过无性繁殖逐代积累产生的品种迅速退化;二是由于现有栽培种的基因库狭窄,特别是缺乏抗病和抗逆性基因,因此用常规的品种杂交的方法,通过基因重组合很难培育出具有抗病性和抗逆性的新品种。这两大生物学路障使马铃薯的育种工作面临着巨大困难,很难再前进一步。本世纪70年代后发展起来的遗传工程技
Conventional crossbreeding in potato is currently encountering two major obstacles: first, the rapid degeneration of cultivars resulting from successive generations of vegetative propagation due to dissemination of the viral disease; and second, due to the narrowing of the gene pool of existing cultivars, in particular the lack of resistance and resistance Therefore, it is difficult to breed new varieties with disease resistance and resistance by gene recombination by the method of conventional cross breeding. These two biological roadblocks make the potato breeding work facing tremendous difficulties and are difficult to go one step further. Genetically engineered technology developed after the 1970s