broad-sense heritability


Also found in: Dictionary, Medical.
Related to broad-sense heritability: selection differential

broad-sense heritability

[¦brȯd ‚sens ‚her·ə·tə′bil·ə·dē]
(genetics)
The degree to which individual phenotypes are determined by their genotypes; expressed as the ratio of the total genetic variance to the total phenotypic variance.
References in periodicals archive ?
In the study of Bonos and coworkers (2004), broad-sense heritability of gray leaf spot was estimated as 0.
The resemblance between MZ twins separated at birth and raised apart also provides a direct estimate of broad-sense heritability, while unrelated (adoptive) siblings provide a direct estimate of the influence of a shared family environment.
Estimates of the broad-sense heritability from the intraclass correlations differed almost by a factor of two between third-instar larvae and adults (0.
When selection is used to reduce the symptoms or the disease severity in the presence of the pathogen (by artificial or natural inoculation), the effects of different genes and alleles in their allelic forms and the dominance variance derived from them, which directly influences the broad-sense heritability, are highly likely to be fixed by selection.
Assessment of seven different selection indices based on Smith-Hazel and Brim-Williams indices showed that the most genetic advance in grain yield and traits such as number of tillers and plant height was accomplished through a completely new index in which economic values were calculated via multiplication of broad-sense heritability values and values of direct effects of path analysis.
The random nongenetic effects had a normal distribution with a mean of zero and were scaled so that broad-sense heritability among testcrosses was H = 0.
Accurately finding the broad-sense heritability of a trait in natural populations, where the organisms in question are not deliberately sorted into particular environments, is quite difficult; in the case of humans, it is all but impossible.
The broad-sense heritability is the proportion of the total phenotypic variance that is explained by the genetic variance.
The broad-sense heritability and the narrow-sense heritability were estimated with the backcross method (WARNER, 1952), by the following expressions:
bfs] = estimate of the broad-sense heritability in the family means, [[?