Kay wrote:I have no idea what micro-propogated is.
I don't believe you, and I think you're winding me up
Fitivver, rare vegetable varieties (and indeed species and cultivars of all plants threatened by extinction) are kept and maintained, mostly by public donation, at Kew Gardens, the Royal Horticultural Society at its various locations, and the HDRA.
In many cases, there are so few potential parent plants still extant that propagation by seed (or tubers in the case of potatoes) is unrealistic.
Hence, plants are propagated in the laboratory using tissue culture. One shoot, using tissue or cell culture, can produce hundreds (even thousands) of young plants.
This is nothing to do with cloning, GM, or Dolly-the-dead-Sheep. This is vegetative propagation, like taking cuttings, but at a micro level.
Micro propagation is good for keeping alive the vegetable varieties we spat out as kids, but it is far more important in preserving plants - many of which are very important medicinally - which are being lost throughout the globe courtesy of human raptors.
You did ask