I have outlined some tools i often use when searching for information on fruit.
I have a whole list of links/documents of different resources.
-From a list of hundreds of sweet cherry varieties with their S genome for pollination and also parentage (if known).
-Another list of 600+ apples genetical tested to be diploid or triploid.
those are just 2 examples out of ~50 or so.
I’m afraid just by the nature of fruit growing, and different climates and institutions, that you won’t find a “master library” anywhere. The trick imo is to learn how to search effectively in the sea of knowledge there already is, even if it is disorganized.