The only way to check pollinators is individually Online pollination checker for fruit trees .If you type in golden delicious you will see exactly what apples pollinate it using this website. Typically a tree closely related to another won’t pollinate the related tree. The chart will let you know what you need to. Dont want to go into ploidy or other factors to much now but we have covered it in the past on here. If you look back on old posts i touched on it Understanding Ploidy and Pollination . You might want to also read this thread Parthenocarpic Pears and this one The modernization of flowering pears
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