As linked in WineTerriorist, interesting article in Mieninger's on a renewed interest in hybrid grapes:
HybridGrapes .

I'm assuming by "hybrid grapes", they are referring to crosses of Vinifera with Rupestris/Rontundfolia/Labrusca/Riparia/Berlandieri/etc that are disease resistant? These hybrid grapes have a long & troubled history in France and other parts of Europe and have pretty much been driven from wine regions.
The ResDur1 varieties or Soreli (Italian hybrid) I've not heard of. I'm assuming these are grapes for wine production? Curious as to what the wines taste like.
This begs the question of if you can make a "natural" wine from these unnatural grapes. SweetAlice will have to way in on that one before we know the answer.