Adiel, regarding mangiferas, as far as I know there are a few projects going on, but not concerning rootstocks, that chapter is closed. They found out many years ago, that the best rootstock for Canary Island are two local tupentine mangos, which perform very good.
On small scale they are trying to develop new cultivars, but I think the budged and efford on that is not very high. They are also always interested in importing and testing new cultivars. But from what I've heard, right now they are more interested in getting more manguifera species then mango cultivars. Mango species are for them interesting because of desease (fungus) ressistance, so maybe they could cross mango with other species. But that would be a long term thing...