I know I ran across something on a forum somewhere within this realm, where there was a genetic % of results for each year of grow-out for a cross. It was a hand-written note deal but split out the percentages of what you would expect year after year over eight years to bring a cross to stability.
I remember that post a thinking it was the same as what I've used in the past, see pic at bottom of my post. It comes from this article,Tomato Gene Basics,which elaborates on "crossing".
Edit: OOOPPPSSS! Late to the party!