http://www.theguardian.com/science/2015/may/20/the-doomsday-vault-seeds-save-post-apocalyptic-world Useful or futile?
Interesting article I think it would be useful for the most part of natural disasters and pestilence. Unless these frozen specimens could not survive in future climate or pestilence because they are frozen in time (pun intended). In order to catch them up they could use current modern genetic engineering getting rid of the preservation idea but would not be viable for large scale use for a couple few years. Great concept they have but there are a few holes in there theory. although some researchers have propagated seeds(wheat) from Egyptian tombs; also worth reading about. also some other researchers have propagated a squash that was thought to be extinct for good from an ancient cash in the Americas. Overall I think it is useful.