Term
| Additive genetic variance |
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Definition
| Genetic variance associated with the average effect of substituting one allele for another. |
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Term
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Definition
| Situation in which the parents of the next generation are chosen based on the presence of useful or desirable characteristics. |
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Term
| Broad-sense heritability (H2) |
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Definition
| Within a particular population, the proportion of total phenotypic variance that is contributed by genetic variance. |
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Term
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Definition
| Existence in a population of an unbroken range of forms, in which every intermediate form is possible. |
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Term
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Definition
| Existence in a population of two or more distinctly different forms. |
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Term
| Dominance genetic variance |
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Definition
| Genetic variance at a single locus attributable to interactions (dominance) between alleles. |
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Term
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Definition
| The extent to which phenotypic differences among individuals are due to genetic differences. |
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Term
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Definition
| A trait that varies quantitatively in increments of whole, countable units. |
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Term
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Definition
| A characteristic that results from multiple genetic and environmental factors that interact to determine a phenotype. |
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Term
| Narrow-sense heritability (h2) |
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Definition
| Within a particular population, the proportion of total phenotypic variance that is contributed by additive genetic variance. |
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Term
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Definition
| Principle that individuals that are better adapted to an environment tend to survive more often and contribute more offspring to the next generation. |
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Term
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Definition
| A group of two or more genetic loci that together control a quantitative trait. |
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Term
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Definition
| Inheritance of a characteristic that varies (usually continuously) in amount. |
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Term
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Definition
| A characteristic that varies in amount of a measurable feature. |
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Term
| Quantitative trait locus (QTL) |
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Definition
| The position on a chromosome of a gene that contributes to a quantitative trait. |
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Term
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Definition
| The difference between the mean of the selected parents and the mean of the general population. |
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Term
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Definition
| The point at which no further improvement can be obtained by artificial selection. |
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Term
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Definition
| The difference between the mean of the offspring of the selected parents and the mean of the original general population. |
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Term
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Definition
| A discrete trait that is brought about when some continuously varying parameter(s) exceeds a critical value. |
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