What is the difference between broad and narrow sense heritability?

The broad-sense heritability of a trait is the proportion of phenotypic variance attributable to genetic causes, while the narrow-sense heritability is the proportion attributable to additive gene effects.

What does narrow sense heritability mean?

Narrow-sense heritability is defined as the fraction of phenotypic variance that can be attributed to variation in the additive effects of genes ( V A ) : h 2 = V A / V P ⋅ . Narrow-sense heritability is always less than or equal to broad-sense heritability.

Why is heritability in narrow sense more useful than heritability in broad sense?

Narrow-sense heritability is usually more practical than broad-sense heritability because it is easier to calculate and often provides a very good estimate of broad-sense heritability. Many phenotypes, including height, are multifactorial traits, meaning they are determined by more than one factor.

What does broad sense heritability mean?

Broad-sense heritability, defined as H2 = VG/VP, captures the proportion of phenotypic variation due to genetic values that may include effects due to dominance and epistasis.

What is the difference between broad sense heritability and narrow sense heritability quizlet?

Broad-sense heritability (H2) represents the proportion of phenotypic variance that is due to genetic variance. It is calculated by dividing the genetic variance by the phenotypic variance. Narrow- sense heritability(h2)- is equal to the additive genetic variance divided by the phenotypic variance.

What is meant by narrow sense?

From Longman Dictionary of Contemporary English narrow sense/definitiona meaning of a word that is exact or limited OPP broad I use the word ‘neighbour’ in its more precise or narrower sense.

Why is heritability in the narrow sense more important for applications like plant and animal breeding?

Narrow sense heritability is a measure of the ratio of additive genetic variation to phenotypic variation in a given population for a given trait. As a rule, traits with greater heritability can be modified more easily by selection and breeding than traits with lower heritability.

What is broad sense heritability quizlet?

Broad sense heritability is an estimate of how much phenotypic variation about the mean is due to genetic factors (it is the ratio of variance due to genetic factors over total variance).

What is the difference between narrow sense heritability h2 and broad sense heritability h2 )?

Two specific types of heritability can be estimated. The broad-sense heritability is the ratio of total genetic variance to total phenotypic variance. The narrow-sense heritability is the ratio of additive genetic variance to the total phenotypic variance.

What is the difference between narrow sense heritability h2 and broad sense heritability h2 )? Quizlet?

What does in a broad sense mean?

‘In a broad sense’ means any terms you’re using (eg in this case ‘behaviour’, ‘English’, and ‘Latvian’) need to be interpreted with the greatest possible latitude rather than in their most narrow, literal meaning. Nun-Translator’s example is (as usual) perfect.