The discovery of the insertion of IbT-DNA1 and IbT-DNA2 into the cultivated (hexaploid) sweetpotato [Ipomoea batatas (L.) Lam.] genome constitutes a clear example of an ancient event of Horizontal Gene Transfer (HGT). However
Sweet potato (Ipomoea batatas, Lam.) is an important root vegetable in developing countries. After its domestication
in Neotropical America, human migration led to the distribution of the sweet potato plant throughout the world. Both
leaf and storage root are high in compounds of nutritional value.
Peru has 103 taxa of wild potatoes (species, subspecies, varieties, and forms) according to Hawkes (1990; modified by us by a reduction of species in theSolanum brevicaule complex) and including taxa described by C. Ochoa since 1989. Sixty-nine of these 103 taxa (67% ) were unavailable from any of the world’s genebanks and 85 of them (83%) had less than three germplasm accessions.
Food production will be hard pressed to keep up with demand in the next 30 years.
The world’s population is expected to swell by some two billion by midcentury,
chiefly in developing countries already struggling to feed their people.