Potato is playing an increasingly important role in food production. The development of new varieties is slow due to the genetic complexity of potato and the inefficient breeding process. Modern techniques, such as hybrid breeding and the introduction of new traits in specific, existing elite material, have not been reported in the development of new and improved potato varieties. This paper describes the first example of marker-assisted introgression of four different Phytophthora infestans resistance genes in selected highly homozygous, diploid potato lines. After two backcrosses and one selfing, the original line can be recovered with Phytophthora resistance, thus providing added value. After crossing two diploid lines, each with a different resistance gene, hybrids were obtained and tested for resistance to Phytophthora in small field trials. In these experiments, the hybrids with two resistance genes were more resistant than the plants with only one of the two resistance genes.

中文翻译：

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二倍体马铃薯抗疫霉基因的基因渗入

马铃薯在粮食生产中发挥着越来越重要的作用。由于马铃薯的遗传复杂性和低效率的育种过程，新品种的发展缓慢。马铃薯新品种和改良品种的开发尚未报道现代技术，例如杂交育种和在特定的现有优良材料中引入新性状。本文描述了在选定的高度纯合，二倍体马铃薯品系中四种不同疫霉菌抗性基因的标记辅助基因渗入的第一个例子。经过两次回交和一次自交后，可以用疫霉菌恢复原始品系电阻，从而提供附加值。跨越两个具有不同抗性基因的二倍体系后，获得了杂种并在小田间试验中测试了对疫霉的抗性。在这些实验中，具有两个抗性基因的杂种比仅具有两个抗性基因之一的植物具有更强的抗性。