Similarly, cisgenesis carries no risks-such as effects on non-target organisms of soil ecosystems, toxicity or a possible allergy risk for GM food of feed-other than those that are also incurred by traditional breeding. Indeed, cisgenesis has a great potential to overcome a major bottleneck in traditional breeding-linkage drag. During introgression breeding, a wild plant with an interesting trait is crossed with a high-quality genotype, such as a cultivar. The wild plant, however, passes on not only its genes of interest to the progeny, but also other, sometimes deleterious genes. This so-called linkage drag can slow down the breeding process tremendously, especially if the gene of interest is genetically tightly linkage to one or more deleterious genes. To reduced linkage drag, plant breeders usually need successive generation of recurrent backcrossing with the cultivated plant and simultaneous selection for the trait to generate a genotype in which the gene of interest is no longer linkage to any undesired genes. By contrast, cisgenesis isolates only the genes of interest from the donor plant, which is then inserted into the recipient in one step. As no other genes are transferred, this method avoids linkage drag. This can enhance the breeding speed. This is the main advantage of cisgenesis compared with traditional introgression breeding.