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Parent/offspring Relations for a Fitness Related Character
Author(s) -
Skovgaard I. M.
Publication year - 1986
Publication title -
biometrical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.108
H-Index - 63
eISSN - 1521-4036
pISSN - 0323-3847
DOI - 10.1002/bimj.4710280817
Subject(s) - character (mathematics) , offspring , heritability , regression , population , selection (genetic algorithm) , relation (database) , biology , statistics , mathematics , evolutionary biology , demography , genetics , computer science , artificial intelligence , sociology , pregnancy , geometry , database
Some parent/offspring relations of a quantitative character are discussed, in particular in relation to the mean change from one generation to the next. It is shown that the prediction of this “progress” as the heritability multiplied by the selection differential takes only the slope of the parent/offspring relation into account and holds if, and only if, the population mean is a fixpoint of the mid‐parent/offspring regression in the case of a character that is unrelated to sex. In particular, two examples show that this may not be the case if the character is related to fitness by pleiotropic effects of single genes.