What is the term for when a hybrid exhibits stronger traits than either parent?

The term for when a hybrid exhibits stronger traits than either parent is known as hybrid vigor. This phenomenon occurs when the offspring of two different breeds or species demonstrate superior qualities such as increased height, growth rate, fertility, or resistance to disease compared to their parents. This enhanced performance is often attributed to the increased genetic diversity that results from the combination of different genetic backgrounds.

In agricultural practices, hybrid vigor is particularly advantageous as it can lead to more robust crop varieties and livestock with improved traits, contributing to better yields and health. The concept contrasts with the other options, which either refer to different genetic processes or do not specifically address the phenomenon of hybrids outperforming their parents. For example, interbreeding generally refers to mating between closely related individuals rather than the advantages seen in hybrids. Genetic screening focuses on identifying specific genes or disorders, while population genetics studies the genetic composition of populations without addressing the hybrid vigor concept directly.