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The tendency of a crossbred individual to show qualities superior to those of both parents.Also called hybrid vigor
- ‘The fixation of deleterious mutations may be a general explanation for heterosis in crosses between ecotypes, despite alternative overdominance interpretations.’
- ‘Traditionally the issue of heterosis has been posed in genetic terms such as dominance and overdominance.’
- ‘The fundamental genetic and physiological causes of heterosis remain poorly understood in plants after nearly a century of exploitation in crop improvement.’
- ‘Genetic background, heterosis, and sex differences can all have profound effects on chiasma and recombination frequencies.’
- ‘With overdominance, unlike alleles are postulated to result in a stimulating effect, so that genetic heterozygosity per se produces heterosis.’
Early 20th century: from Greek heterōsis ‘alteration’, from heteros ‘other’.
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From Afghanistan to Zimbabwe, discover surprising and intriguing language facts from around the globe.
The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.