Hybrid vigor
Hybrid vigor
Hybrid vigor, also known as Heterosis (pronounced: /ˌhɛtəˈroʊsɪs/), is a phenomenon in genetics where the offspring of two different varieties of a species show superior traits compared to both of the parent varieties. The term 'hybrid vigor' is derived from the Latin words 'hybrida' meaning 'the offspring of a tame sow and a wild boar' and 'vigor' meaning 'active strength or force'.
Explanation
Hybrid vigor is a result of the genetic recombination that occurs during sexual reproduction. This recombination can lead to offspring with new combinations of traits that may be more advantageous in their environment than the traits of their parents. This can result in increased fitness, such as greater size, faster growth, increased fertility, or increased yield in plants.
Examples
One of the most common examples of hybrid vigor is in agriculture, where it is often used to improve the yield and quality of crops. For example, hybrid corn often shows hybrid vigor, with the hybrid plants being larger and more productive than either of the parent varieties.
Related Terms
- Inbreeding depression: The reduced biological fitness in a given population as a result of inbreeding, or breeding of related individuals.
- Outbreeding enhancement: The increased fitness resulting from breeding of unrelated individuals, often leading to increased hybrid vigor.
- Crossbreed: The result of breeding different breeds, varieties, species, or genera.
See Also
External links
- Medical encyclopedia article on Hybrid vigor
- Wikipedia's article - Hybrid vigor
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