F1 hybrid is a term used in genetics and selective breeding. F1 stands for Filial 1, the first filial generation seeds/plants or animal offspring resulting from a cross mating of distinctly different parental types.
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Credit Kirsten Luce for The New York Times. 1  BLOOMINGBURG, N.Y. â Clifford M. Teich came to this rustic village in the foothills of the Catskills 30 years ago to be a country doctor, an internist who would treat his fellow villagersâ aches and pains, and get to know them as neighbors.