David,
Michele & hazeleyes, thanks for the links!
admmad, thanks for the great information. You have a way of explaining very confusing things so that they actually make some sense!
I only have one orange that I've worked with, and have only seen 2 seedlings bloom from it so far. Both of the seedlings had wonderful color. I think I need to get a few more oranges, even though it is one of my least favorite colors.