The sources I have read treat it as fact, so I hoping that is the case. Never can tell sometimes!
So, I still have several marula seeds left from the ones I got a few years ago. I have them marked as to male and female. Sadly, I didn't hear the odd/even eye thing until after I had planted mine. I selected the strongest to keep, and I don't know it's sex, but MOST of the seeds I planted had two eyes (I remember, since I spent so long carefully prying the eyes out with my pocket knife!). Because of the size of my greenhouse, I only have room for one marula. Once it blooms, I will see if it is male of female, then plant a seed of the opposite sex, grow it up a while and graft it to my big tree.
Or, if there are other folks growing marula, maybe we can swap scions. How old are they to bloom?
Cheers!
Carolyn