https://wikimd.org/index.php?action=history&feed=atom&title=HeterosisHeterosis - Revision history2026-04-26T03:49:03ZRevision history for this page on the wikiMediaWiki 1.44.2https://wikimd.org/index.php?title=Heterosis&diff=6311284&oldid=prevPrab: CSV import2025-02-18T01:22:11Z<p>CSV import</p>
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<p><b>New page</b></p><div>'''Heterosis''', also known as '''hybrid vigor''' or '''outbreeding enhancement''', is a phenomenon in which the hybrid offspring of two different varieties of a species show qualities superior to those of both parents. This concept is widely used in plant and animal breeding.<br />
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== Overview ==<br />
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The term [[Heterosis]] was coined by [[George Harrison Shull]] in 1914. It is a phenomenon observed in the offspring resulting from a cross-breeding of parents from different species or subspecies, or even from different strains or varieties within a species. The offspring, or hybrids, exhibit traits that are stronger, more robust, or more efficient than those of either parent.<br />
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== Mechanisms ==<br />
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The exact mechanisms behind heterosis are not fully understood, but several theories have been proposed. These include the [[Dominance hypothesis]], the [[Overdominance hypothesis]], and the [[Epistasis hypothesis]]. Each of these theories suggests different genetic factors that could contribute to the superior qualities observed in hybrid offspring.<br />
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== Applications ==<br />
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Heterosis has been widely used in [[Agriculture|agricultural]] practices for many years. It is particularly useful in the breeding of [[Crop plants|crop plants]] and [[Livestock|livestock]], where it can result in increased yield, size, or efficiency. Some examples of crops that have benefited from heterosis include [[Corn|corn]], [[Rice|rice]], and [[Wheat|wheat]].<br />
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== See also ==<br />
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* [[Hybrid (biology)|Hybrid]]<br />
* [[Inbreeding depression]]<br />
* [[Plant breeding]]<br />
* [[Animal breeding]]<br />
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== References ==<br />
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<references /><br />
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[[Category:Genetics]]<br />
[[Category:Agriculture]]<br />
[[Category:Biology]]<br />
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