Abstract
SummaryThe classical relationship for genetic progress (ΔG♀ = i h2 σ P) does not apply to a worker character in the honeybee (Apis mellifera) since an aunt-niece relationship takes the place of the parent-offspring relationship. When the genealogy involves only mother-daughter links (no relationship through males), the heritability sensu stricto need not be estimated, but can be substituted by the product φh2, where φ is the average coefficient of relationship between the workers of a colony. This product is equal to the mother—daughter regression coefficient or twice the within-family correlation.
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