title: Genetic incompatibility drives mate choice in a parasitic wasp.
abstract: BACKGROUND
  Allelic incompatibility between individuals of the same species should select for mate choice based on the genetic make-up of both partners at loci that influence offspring fitness. As a consequence, mate choice may be an important driver of allelic diversity. A complementary sex determination (CSD) system is responsible for intraspecific allelic incompatibility in many species of ants, bees, and wasps. CSD may thus favour disassortative mating and in this, resembles the MHC of the vertebrate immune system, or the self-incompatibility (SI) system of higher plants.
  
  
  RESULTS
  Here we show that in the monogamous parasitic wasp Bracon brevicornis (Wesmael), females are able to reject partners with incompatible alleles. Forcing females to accept initially rejected partners resulted in sex ratio distortion and partial infertility of offspring.
  
  
  CONCLUSIONS
  CSD-disassortative mating occurred independent of kin recognition and inbreeding avoidance in our experiment. The fitness consequences of mate choice are directly observable, not influenced by environmental effects, and more severe than in comparable systems (SI or MHC), on individuals as well as at the population level. Our results thus demonstrate the strong potential of female mate choice for maintaining high offspring fitness in this species.
authors.affiliation: Population and Evolutionary Ecology, Institute of Ecology, University of Bremen, FB 2, Leobener Str, NW2, 28359 Bremen, Germany. thiel@uni-bremen.de.
authors.forename: Andra
authors.initials: A
authors.lastname: Thiel
authors.forename: Anne C
authors.initials: AC
authors.lastname: Weeda
authors.forename: Jetske G
authors.initials: JG
authors.lastname: de Boer
authors.forename: Thomas S
authors.initials: TS
authors.lastname: Hoffmeister
references.citation: Genetica. 2008 Sep;134(1):147-58
references.pmid: 17973192
references.citation: Proc Natl Acad Sci U S A. 2005 Jul 26;102(30):10742-6
references.pmid: 16020532
references.citation: PLoS One. 2010 Oct 19;5(10):e13505
references.pmid: 20976063
references.citation: Science. 1983 Jun 3;220(4601):1049-51
references.pmid: 17754551
references.citation: Mol Ecol. 2005 Jan;14(1):19-38
references.pmid: 15643948
references.citation: Mol Ecol. 2009 Aug;18(15):3307-15
references.pmid: 19508451
references.citation: Evolution. 2012 Feb;66(2):459-68
references.pmid: 22276541
references.citation: Science. 2010 Oct 22;330(6003):493-5
references.pmid: 20966249
references.citation: Annu Rev Entomol. 2008;53:209-30
references.pmid: 17803453
references.citation: Science. 2003 Sep 5;301(5638):1343
references.pmid: 12958352
references.citation: Trends Ecol Evol. 2004 Jun;19(6):329-33
references.pmid: 16701279
references.citation: Biol Lett. 2009 Aug 23;5(4):449-51
references.pmid: 19411269
references.citation: Trends Ecol Evol. 2004 Oct;19(10):554-9
references.pmid: 16701321
references.citation: Psychoneuroendocrinology. 2009 May;34(4):497-512
references.pmid: 19054623
references.citation: J Evol Biol. 2003 May;16(3):363-77
references.pmid: 14635837
references.citation: Front Zool. 2006 Jan 05;3:1
references.pmid: 16393347
references.citation: Cell. 2003 Aug 22;114(4):419-29
references.pmid: 12941271
references.citation: Proc Biol Sci. 1995 Jun 22;260(1359):245-9
references.pmid: 7630893
references.citation: Trends Ecol Evol. 2006 Feb;21(2):55-7
references.pmid: 16701470
references.citation: Mol Ecol. 2000 Aug;9(8):1013-27
references.pmid: 10964221