Sibling competition and the advantage of mixed families Barton, Nicholas H ; https://orcid.org/0000-0002-8548-5240 Post, R.J. It is noted that the sibling competition model for the evolution of sex and recombination, as it has been developed so far, involves truncation selection. After briefly reviewing aspects of the development and behaviour of such models an analytical treatment is presented which involves additive selection. Additive selection, as compared with truncation selection, decreases the advantage of sex to such an extent that it is unlikely that sibling competition could overcome its intrinsic two-fold cost, although it could still be important in promoting family variability produced by other mechanisms, such as polyandry. Elsevier 1986 info:eu-repo/semantics/article doc-type:article text http://purl.org/coar/resource_type/c_2df8fbb1 https://research-explorer.ista.ac.at/record/4323 Barton NH, Post RJ. Sibling competition and the advantage of mixed families. <i>Journal of Theoretical Biology</i>. 1986;120(4):381-387. doi:<a href="https://doi.org/10.1016/S0022-5193(86)80033-9">10.1016/S0022-5193(86)80033-9</a> eng info:eu-repo/semantics/altIdentifier/doi/10.1016/S0022-5193(86)80033-9 info:eu-repo/semantics/altIdentifier/issn/0022-5193 info:eu-repo/semantics/altIdentifier/e-issn/1095-8541 info:eu-repo/semantics/closedAccess