Sweet Potato Is 'Genetically Modified' By Nature
News Apr 22, 2015
Sweet potato is one of the most important food crops for human consumption in the world. The researchers discovered the foreign DNA sequences of Agrobacterium while searching the genome – this is the entire DNA-code – of sweet potato for viral diseases. Instead of contributing this peculiar finding to bacterial contamination of the plant samples, the researchers decided to study these sequences in more detail.
The sequences appeared to be present in each of the 291 tested sweet potato cultivars and even in some wild related species. Different research methods confirmed the same conclusion: the specific sequences are not due to contamination, but they are part of the sweet potato genome. The genes in the foreign DNA sequences were also shown to be active in sweet potato, which can indicate that they provide a positive characteristic which was selected for by the farmers during domestication.
The natural presence of Agrobacterium demonstrates that genetic modification also happens in nature. In comparison to 'natural' gmos, that are beyond our control, human-made gmos have the advantage that we know exactly which characteristic we add to the plant.
This discovery was published on 21 April on the website of Proceedings of the National Academy of Sciences of the United States of America (PNA). Later it will be on the cover of this magazine.
Discovery of Reversible "Master Switch" Sheds Light on Regulation of Developmental GenesNews
The bivalent master switch model provides a conceptually simple explanation for how each developmental step is made along the path to different cell types, dependent on cell type-specific proteins, but acting through this common module.READ MORE
25 New Genomes to Celebrate 25 Years of the Sanger InstituteNews
The Institute is sequencing 25 new genomes, from the blackberry to the robin, bush cricket to brown trout, the 25 species all reside in the UK and represent the richness of species in this country.READ MORE
Horizon Discovery Partners with The Michael J. Fox FoundationNews
Innovative and relevant models for understanding alpha-synuclein biology and Parkinson’s disease pathogenesis in vivo.READ MORE