Heterosis

Heterosis, also known as hybrid vigor, is a phenomenon that occurs when two differently-bred varieties of a species are crossbred together and the offspring show increased performance compared to the parents. Heterosis is seen most commonly in agricultural and horticultural species, where it has significant economic importance. For example, heterosis can lead to increased yield, disease resistance, and various other desirable traits in crops. Heterosis can also be seen in some animals, such as when two differently-bred dogs are bred together to create dogs with the best traits of both parents. Heterosis is an important tool used by breeders to improve their crops and animals in a variety of ways.