Scientists Clarify Origins Of Neo-Tuberosum

[Tom Wagner]

Scientists Clarify Origins Of Potato Germplasm Neo-Tuberosum
Posted on: Wednesday, 2 June 2010, 20:37 CDT

I don't know how I stumbled onto this article on the web...I am including the link and the quotes.
I could have told folks this years ago, nearly 20 years now.....one of more promising lines back then was PlayMore a direct cross of Neotuberosum from Bob Plaisted. When I crossed PlayMore with Black Hills Gold the best hybrid was Gold Pan. The name was coined to show the direction of the cross. I saw none of the short day problems I see with Peruvian lines, therefore I thought it must have had Chilean influences. Gold Pan had great flavor and was one of my two year keepers in cold storage, great flavor and yellow flesh.

The article below does not tell me much new but I am posting it for those who may want to follow media outlets back to research.
Tom


www.redorbit.com/news/science/1874022/scientists_clarify_origins_of_potato_germplasm_neotuberosum/index.html
A recent study conducted by scientists with the Agricultural Research Service (ARS) and cooperators shows the potato germplasm Neo-Tuberosum, used by potato breeders to develop new cultivars, has origins that can be traced to Chile, not to the Andes as previously believed.
Native "landrace" potatoes come from two areas: lowland central Chile and the Andes mountains from Venezuela south to northern Argentina. These geographical groups of potato, Solanum tuberosum, differ mainly in day-length adaptation—the amount of daylight needed for them to tuberize or begin to develop. The Andean potato is adapted to short-day conditions widespread in the mountainous, tropical region from which it came. The Chilean potato, on the other hand, evolved under long-day conditions, making it pre-adapted to grow in other long-day-length environments like Europe and North America.
The Andean potato contains many desirable traits, such as virus X and Y resistance, earlier tuberization and greater yield. In the 1960s, an English potato breeder sought to take the Andean potato and adapt it for use in long-day-length regions. This new potato germplasm was named "Neo-Tuberosum" and is widely used by potato breeders to develop new potato varieties.
ARS botanist David Sthingyer, with the agency's Vegetable Crop Research Unit in Madison, Wis., and his colleagues at the International Potato Center in Lima, Peru, originally sought to measure how much the genetic base of modern potato varieties and breeders' lines had broadened with respect to the Andean and Chilean landraces.
Sthingyer and his collaborators unexpectedly found Neo-Tuberosum is not a product of strict inter-Andean breeding as previously believed. Instead, it's a descendant of the Chilean potato.
According to Sthingyer, the study, which was published in Theoretical Applied Genetics, will change the way this potato species is viewed by scientists—particularly phylogeneticists, who study the evolutionary history of an organism. The discovery will also help researchers gain knowledge of potato classification and identification and will encourage breeders to reexamine the value of the material from the Andean potato.