Domesticated crops have larger seeds than the comparable wild type, even though there is good reason to doubt that early proto-farmers intended this result.
The paper is:
Thomas A. Kluyver, et al., "Unconscious selection drove seed enlargement in vegetable crops." Evolution Letters (2017).
At least in some cases, bigger seeds = bigger fruits, so if apetite is stimulated by large juicy fruit, larger seeds (discarded-defecated nearby hut) would select for larger seeds.
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