I do have Arctic Glo, and it's redder than Indian Free. So both parents are white peach/nectarine with red flesh. This should be a third type really, comes from whites though. It ripens in early August, so hoping a cross will yield an earlier peach than Indian Free. Also Arctic Glo is a fairly big fruit, not as big as the nectaplum, that one is massive! Anyway hoping for a bigger peach as Indian Free is rather a small peach. If I can get a bigger Indian Free-like cultivar to ripen earlier, I can increase brix, as temps fall in the fall. Ripening a bit earlier should produce a sweeter peach.
I'm fairly positive all three seedlings I have are from Arctic Glo. The nectplum is red, no signs of that. My lucky 13 had freeze damage and produced no peaches. The pollen was probably no good. It's the farthest tree too. They don't look like plums, so it's got to be Arctic Glo. Which is the closest tree too.
It's also possible the fruit is bad, I need to keep as many as possible, and taste the fruit, decide from there. I can't keep them all though. This is fun, I'll do it again next year, and maybe take them to my cottage plant them there.