Identification of molecular markers in Solanum Hirtum associated with resistance genes to meloydogyne incognita and fusarium oxysporum, for the development of commercial varieties in Naranjilla.

Orange or lulo, Solanum Quitoense is a commercial crop in Ecuador and Colombia, whose fruit is used in the preparation of juices, ice cream and jams, and has great potential to be an export fruit. In previous decades its cultivation reached a remarkable development in Ecuador becoming the basis of the economy of some Amazonian peoples and some Andean. The orange is a species in the process of domestication with low level of selection, susceptible to many phytosanitary limitations, especially related to root systems as the nematode meloidogyne incognita, and the fusarium oxysporum fungus. These two pathogens have caused the farmers dedicated to this crop to migrate to the primary forest to escape the inoculum. To this is added the use of chemicals for control. Previous studies have reported resistance to pathogens in wild species appeared with orange as Solanum Hirtum, which include resistance to the M. Incognita and F. OxySporum nematode. However, the mechanisms involved in resistance to these diseases remain unknown. Nor have molecular markers associated with resistance characters have been reported. The use of microsatellite and wealth molecular markers (Resistance Gene Analogs) designed from "preserved motifs" of resistance genes in Solanáceas and that are in the test stage in a population in segregation of tree tomato and S. Acutatum, could serve for the identification of resistance genes in populations in segregation of S. Quitoense and S. Hirtum. These molecular markers could be used in an improvement program for orange cultivation.