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heterosis |
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heterosis [ˌhɛtəˈrəʊsɪs] n (Life Sciences & Allied Applications / Biology) Biology another name for hybrid vigour [from Late Greek: alteration, from Greek heteroioun to alter, from heteros other, different] heterosis abnormal development, especially increased size, in plants or animals, usually as a result of cross-breeding. See also: Animals, Plantsabnormal development, especially increased size, in plants or animals, usually as a result of crossbreeding. See also: Size
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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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