Definition of heterosis in English:

heterosis

noun ˌhɛtəˈrəʊsɪsˌhedəˈrōsəs

technical term for hybrid vigour
Example sentencesExamples
- Genetic background, heterosis, and sex differences can all have profound effects on chiasma and recombination frequencies.
- Traditionally the issue of heterosis has been posed in genetic terms such as dominance and overdominance.
- With overdominance, unlike alleles are postulated to result in a stimulating effect, so that genetic heterozygosity per se produces heterosis.
- The fixation of deleterious mutations may be a general explanation for heterosis in crosses between ecotypes, despite alternative overdominance interpretations.
- The fundamental genetic and physiological causes of heterosis remain poorly understood in plants after nearly a century of exploitation in crop improvement.

Origin

Early 20th century: from Greek heterōsis 'alteration', from heteros 'other'.

Definition of heterosis in US English:

heterosis

nounˌhedəˈrōsəs

The tendency of a crossbred individual to show qualities superior to those of both parents.
Also called hybrid vigor
Example sentencesExamples
- Genetic background, heterosis, and sex differences can all have profound effects on chiasma and recombination frequencies.
- Traditionally the issue of heterosis has been posed in genetic terms such as dominance and overdominance.
- With overdominance, unlike alleles are postulated to result in a stimulating effect, so that genetic heterozygosity per se produces heterosis.
- The fixation of deleterious mutations may be a general explanation for heterosis in crosses between ecotypes, despite alternative overdominance interpretations.
- The fundamental genetic and physiological causes of heterosis remain poorly understood in plants after nearly a century of exploitation in crop improvement.

Origin

Early 20th century: from Greek heterōsis ‘alteration’, from heteros ‘other’.

单词	heterosis
释义	Definition of heterosis in English: heterosis noun ˌhɛtəˈrəʊsɪsˌhedəˈrōsəs technical term for hybrid vigour Example sentencesExamples Genetic background, heterosis, and sex differences can all have profound effects on chiasma and recombination frequencies. Traditionally the issue of heterosis has been posed in genetic terms such as dominance and overdominance. With overdominance, unlike alleles are postulated to result in a stimulating effect, so that genetic heterozygosity per se produces heterosis. The fixation of deleterious mutations may be a general explanation for heterosis in crosses between ecotypes, despite alternative overdominance interpretations. The fundamental genetic and physiological causes of heterosis remain poorly understood in plants after nearly a century of exploitation in crop improvement. Origin Early 20th century: from Greek heterōsis 'alteration', from heteros 'other'. Definition of heterosis in US English: heterosis nounˌhedəˈrōsəs The tendency of a crossbred individual to show qualities superior to those of both parents. Also called hybrid vigor Example sentencesExamples Genetic background, heterosis, and sex differences can all have profound effects on chiasma and recombination frequencies. Traditionally the issue of heterosis has been posed in genetic terms such as dominance and overdominance. With overdominance, unlike alleles are postulated to result in a stimulating effect, so that genetic heterozygosity per se produces heterosis. The fixation of deleterious mutations may be a general explanation for heterosis in crosses between ecotypes, despite alternative overdominance interpretations. The fundamental genetic and physiological causes of heterosis remain poorly understood in plants after nearly a century of exploitation in crop improvement. Origin Early 20th century: from Greek heterōsis ‘alteration’, from heteros ‘other’.
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