OK. Monsanto seems to have a unique interpretation of IP for themselves. They invented a genetic modification of existing crops. Now they claim the modified crops themselves as their IP, which is like HP claiming copyright on material printed with their printers. Not only that, they also claim rights on the following generations of these crops, which is just absurd.
If you want to patent your genetic modifications, so noone else can apply it, go ahead - sue people who apply the same modifications. But claiming IP rights on modified (with it) seeds is not reasonable.