Research has been conducted to determine any genetic aspects of heterosis. The scientists couldn't narrow down specifics of the genomics; however, grouped regions of several genes have been highlighted in the study. It was determined that the genes associated with heterosis act similarly to dominant gene alleles. To show a substantial change in plant qualities, the plant must have at least one copy of a variant, or complete dominance. The dominance is compared to a spectrum where some qualities are partially positive or partially negative dominant, depending on the effect of the genomics on the plant.
These different aspects of dominance help when mutations are involved. They have no effect on the plant when present from only one parent. Also, the quantity of proteins produced by the genes affects the plants. This is called dosage sensitivity. While both the dominance spectrum and dosage sensitivity do not affect plants identically, they generally benefit the plants. Scientists have speculated why heterosis does this and have considered it to only be a part of natural selection.
I feel like even though heterosis has roots within natural selection, since evolution is the demonstration of genetic change over time, heterosis also has genetic causes. With genetic modification, I believe we can properly improve the vigor of hybrid plants. We just haven't pinpointed specific genes that are responsible. The study of heterosis and plant science has a practical application to our world. We have a global demand for food, especially with the rising population rates. By understanding heterosis and how it affects the vigor of plants, we are able to understand how to provide strong, viable food sources for ourselves and future generations.