Overdominance

Overdominance

An effect in the heterozygote, A/a, which is greater than that in the homozygous dominant, A/A.

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Part of Speech: noun
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Industry/Domain: Agriculture
Category: Rice science
Company: IRRI
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Related terms

overdominance

Biotechnology; Genetic engineering

A condition in which heterozygotes are superior (on some scale of measurement) to either of the associated homozygotes.

overdominance

Agriculture; Rice science

An effect in the heterozygote, A/a, which is greater than that in the homozygous dominant, A/A.

overdominance

Biology; Biochemistry; Molecular biology

A relationship in which the phenotypic expression of the heterozygote is greater than that of either homozygote.

overdominance (heterozygote advantage)

Archaeology; Human evolution

Condition in which the heterozygote has higher fitness than either of the homozygotes.

watershed

Agriculture; Rice science

The total area from which a single river collects surface water runoff; the catchment or drainage area of a river system.

watershed degradation

Agriculture; Rice science

A marked deterioration in the hydrological behavior of a river system which reduces the potential of land and water by causing a water flow of inferior quality, quantity and ...

waterlogging

Agriculture; Rice science

Impeded drainage; or soil saturated with water but not necessarily with standing water.

waterlogged field

Agriculture; Rice science

A field which continuously has standing water and cannot be drained. The water level may not be deep.

water use efficiency

Agriculture; Rice science

1). Expressed in terms of dry matter or harvested portion of the crop produced per unit of water consumed. 2). Ratio of the water used for evapotranspiration, seepage, and ...