Introduction to Quantitative Genetics
The general term that describes the proportion of the genetic variance to
the total variance is heritability.
Boad-sense heritability is the ratio of total genetic variance to
total phenotypic variance.
Narow-sense heritability is the ratio of additive genetic variance
to the total phenotypic variance.
Important points about heritability
The heritability estimate is specific to the population and environment you
The estimate is a population, not an individual parameter.
Heritability does not indicate the degree to which a trait is genetic, it
measures the proportion of the phenotypic variance that is the result of