Genetics or environment?
Here's a photo of fruit from a Boar's Hoof plant. I grew two plants of this variety this year in different garden beds. One plant yielded fruit with this very distinct mustard/green shoulders type, the other with no/very subtle green shoulders. At first I thought I found an interesting variant/mutant, but a few weeks later I noticed the a similar pattern in the seemingly related Evan's Purlple Pear, with again two plants in the same different beds. My question: is this shoulders coloration related to differences in the micro-climate, or a genetic variant. I saved seed from both to give a definitive answer next summer, but thought someone might be able to speak from experience.
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