- 1. Seed produced by crossing genetically dissimilar parents.2. In plant breeding, used colloquially for seed produced by specific crosses of selected pure lines, such that the F1 crop is genetically uniform and displays hybrid vigour. As the F1 plants are heterozygous with respect to many genes, the crop does not breed true and so new seed must be purchased each season.
Glossary of Biotechnology for Food and Agriculture . 2015.
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