In my opinion this is the leading textbook in English. Perhaps I’ll add a few more specific to fruits later on.
I often wonder how much is “science” and how much is dogged persistence. Luther Burbank achieved unbelievable outcomes without the scientific principles we use today. He made millions of crosses in his lifetime. Granted that Burbank did not have methods to do embryo rescue, but still, he successfully made multiple cross-species hybrids.
Never mind that he knew John Rock and Gustav Eisen.
It’s not Burbank’s fault they were bad at naming plants after themselves.
And Ivan Michurin!