A hybrid strain created by pollinating two very carefully selected parents. The resulting seedlings usually show great vigor and uniformity and many strains of annuals and vegetables are F1 hybrids. It is useless to save seeds from these, as the original cross must be made afresh every time seed is wanted.
The first generation offspring of two closely related but distinct species or strains; usually more vigorous than the parent species and may have other desirable attributes. Self-pollination of FI hybrids rarely produces plants that are true to type.
A hybrid strain created by crossing two very carefully selected parents, created afresh for every batch of seed. The resulting seedlings usually show great vigor and uniformity and many strains of annuals and vegetables are FI hybrids. It is useless to save seeds from these.