Heritability (h2)

Term Definition
Heritability (h2)
The proportion of differences we observe between a population of individuals that can be attributed to genetics. We usually talk about Narrow-sense heritability which is specific to the differences observed that are attributed to additive genetic value. Heritability ranges from 0 to 1 with lower numbers being lowly heritable (not much of the phenotypic variation is due to genetics) and higher numbers being highly heritable (a larger portion of the phenotypic differences are due to genetics). Reproductive traits tend to be lowly heritable and growth traits tend to be highly heritable.


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