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Genetic hitchhiking can promote the initial spread of strong altruism.
Santos, Mauro (Universitat Autònoma de Barcelona. Departament de Genètica i de Microbiologia)
Szathmáry, Eörs (Collegium Budapest. Institute for Advanced Study (Hongria))

Data: 2008
Resum: Background: The evolutionary origin of strong altruism (where the altruist pays an absolute cost in terms of fitness) towards non-kin has never been satisfactorily explained since no mechanism (except genetic drift) seems to be able to overcome the fitness disadvantage of the individual who practiced altruism in the first place. Results: Here we consider a multilocus, single-generation random group model and demonstrate that with low, but realistic levels of recombination and social heterosis (selecting for allelic diversity within groups) altruism can evolve without invoking kin selection, because sampling effects in the formation of temporary groups and selection for complementary haplotypes generate nonrandom associations between alleles at polymorphic loci. Conclusion: By letting altruism get off the ground, selection on other genes favourably interferes with the eventual fate of the altruistic trait due to genetic hitchhiking.
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès.
Document: article ; publishedVersion
Publicat a: BMC Evolutionary biology, Vol. 8, N. 281 (October 2008) , p. 1-12, ISSN 1471-2148

DOI: 10.1186/1471-2148-8-281
PMID: 18847475

12 p, 404.5 KB

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