My personal rule of thumb is that "good pollen donor" is too low on the list of characteristics to worry about. Most varieties provide decent amounts of pollen, and I think it is best to focus on other traits (like color, flavor, vigor, etc.).
I only think about the better pollen donors (and receivers) once I have a cross that I want to make over and over. At that point, I will consider how to set up which variety in a pair should be used as the male, and which should be used as the female.
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