F₁ hybrid

An F₁ hybrid in botany refers to the first filial generation of offspring resulting from a cross between two genetically different parent plants. These hybrids often exhibit "hybrid vigor," or heterosis, meaning they can be more vigorous than their parents. This vigor can lead to increased growth rates, greater uniformity, earlier flowering, and, importantly for agriculture, increased yields.12

The development of hybrid varieties focuses on producing these F₁ plants, rather than creating a pure-breeding population. While hybrid corn (maize) is a prime example due to its ease of controlled pollination, advancements like cytoplasmic male sterility have made hybrid varieties feasible in many other crops. Farmers typically purchase new hybrid seed each year because much of the hybrid vigor is lost in subsequent generations.13