Sorry for not responding immediately,
info about chromosome numbers, are widely available on the web: search (plant name) chromosome numbers, very simple.
Indeed it will be very interesting to have someone taking a look, now compatibility be, doesn't means it will be successful, nature thing you! know. and give it a try for at least a full year minimum.
*I don't know your fertilizer composition, but make sure you have at least the 17 minimums minor, micro and trace elements, personally I use over 60 in my program.
*as you probably know already Adenium flowers are most receptible on the second day.
*as pollen is best as soon bags open, pollination should be done in early morning, overcast days be the best.
*and finally have on standby young seedlings just in case they needs to be transferred on a stronger root system *the best method with Adeniums will be the cotyledon graft.
Have fun and keep us informed.
And please excuse me for my poor English, I never had a chance to go to school for it!
