MHC genotype and male ornamentation: Genetic evidence for the Hamilton-Zuk model

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Abstract

The major histocompatibility complex (MHC) is an immunologically important cluster of highly variable genes that is known to affect fitness in domesticated mammals and birds. Spur length of male pheasants in southern Sweden correlates with male viability, female mate choice, and offspring survival rate. Here we show by genetic analyses that the MHC genotype is associated with variation in both male spur length and male viability. These are the first data that directly support a 'good genes' hypothesis by Hamilton and Zuk predicting that females discriminate among males on the basis of secondary sexual characters in order to pass on genes for disease resistance that improve fitness in their offspring.

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Subject classification (UKÄ) – MANDATORY

  • Biological Sciences

Keywords

  • branta-leucopsis, barnacle goose, sexual selection, preferences, mating, phasianus-colchicus, major histocompatibility complex, evolution, viability, pheasant, haplotypes
Original languageEnglish
Pages (from-to)265-271
JournalRoyal Society of London. Proceedings B. Biological Sciences
Volume263
Issue number1368
Publication statusPublished - 1996
Publication categoryResearch
Peer-reviewedYes