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The quantitative genetic basis of sex ratio variation in Nasonia vitripennis: a QTL study

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Author(s)

B. A. Pannebakker, R. Watt, S. A. Knott, S. A. West, David Michael Shuker

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Abstract

Our understanding of how natural selection should shape sex allocation is perhaps more developed than for any other trait. However, this understanding is not matched by our knowledge of the genetic basis of sex allocation. Here, we examine the genetic basis of sex ratio variation in the parasitoid wasp Nasonia vitripennis, a species well known for its response to local mate competition (LMC). We identified a quantitative trait locus (QTL) for sex ratio on chromosome 2 and three weaker QTL on chromosomes 3 and 5. We tested predictions that genes associated with sex ratio should be pleiotropic for other traits by seeing if sex ratio QTL co-occurred with clutch size QTL. We found one clutch size QTL on chromosome 1, and six weaker QTL across chromosomes 2, 3 and 5, with some overlap to regions associated with sex ratio. The results suggest rather limited scope for pleiotropy between these traits.

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Details

Original languageEnglish
Pages (from-to)12-22
Number of pages11
JournalJournal of Evolutionary Biology
Volume24
Issue number1
Early online date26 Oct 2010
DOIs
Publication statusPublished - Jan 2011

    Research areas

  • Brood size, Clutch size, Linkage map, Local mate competition, Nasonia, Oviposition, Parasitoid wasp, Sex allocation, Parasitic wasp, Trait loci, Natural-selection, Fig wasps, Variable fecundity, Mating-behavior, Information use, Allocation

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