Heritability of various
traits in poultry
heritabiliy of 0.5 indicates that
phenotypic variance is attributable to genotypic variance,
selective breeding has the potential to provide significant
the production trait. Note that 'Egg
Quality' characters are often highly heritable,
whereas 'Egg Production'
traits under mass
rearing are not. Likewise, 'Viability'
characters show very low heritability: this indicates a large
environmental influence, and for example that
respiratory diseases are best approached as questions for
sanitation or antibiotic treatment.