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heterosis |
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heterosis /het·er·o·sis/ (het″er-o´sis) the existence, in the first generation hybrid, of greater vigor than is shown by either parent strain. heterosis [het′ərō′sis] Etymology: Gk, heteros + osis, condition the superiority of first-generation hybrid plants and animals with respect to one or more traits when compared with either of the parent strains or with corresponding inbred strains. Also called hybrid vigor. heterosis the existence, in the first generation hybrid, of greater vigor than is shown by either parent. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The percentage of heterosis (hybrid vigor--the amount of increased yield) also tends to be less at higher yield levels. Yield-boosting heterosis declines by a few percent with each succeeding generation of plants, notes Sanjaya Rajaram, director of the center's wheat programs. |
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