Sex determination meltdown upon biological control introduction of the parasitoid Cotesia rubecula?

Jetske G. De Boer, Bram Kuijper, George E. Heimpel, Leo W. Beukeboom

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Natural enemies may go through genetic bottlenecks during the process of biological control introductions. Such bottlenecks are expected to be particularly detrimental in parasitoid Hymenoptera that exhibit complementary sex determination (CSD). CSD is associated with a severe form of inbreeding depression because homozygosity at one or multiple sex loci leads to the production of diploid males that are typically unviable or sterile. We observed that diploid males occur at a relatively high rate (8-13% of diploid adults) in a field population of Cotesia rubecula in Minnesota, USA, where this parasitoid was introduced for biological control of the cabbage white Pieris rapae. However, our laboratory crosses suggest two-locus CSD in a native Dutch population of C. rubecula and moderately high diploid males survival (approximately 70%), a scenario expected to produce low proportions of diploid males. We also show that courtship behavior of diploid males is similar to that of haploid males, but females mated to diploid males produce only very few daughters that are triploid. We use our laboratory data to estimate sex allele diversity in the field population of C. rubecula and discuss the possibility of a sex determination meltdown from two-locus CSD to effective single-locus CSD during or after introduction.

Original languageEnglish (US)
Pages (from-to)444-454
Number of pages11
JournalEvolutionary Applications
Volume5
Issue number5
DOIs
StatePublished - Jul 1 2012

Fingerprint

Cotesia rubecula
sex determination
parasitoid
biological control
Diploidy
diploidy
gender
loci
population bottleneck
Population
inbreeding depression
Biological Phenomena
Courtship
Triploidy
Pieris rapae
Hymenoptera
courtship
natural enemy
Haploidy
Brassica

Keywords

  • Cabbage
  • Complementary sex determination
  • Diploid males
  • Haplodiploidy
  • Life history
  • Natural enemies
  • Parasitic wasps
  • Pieris rapae

Cite this

Sex determination meltdown upon biological control introduction of the parasitoid Cotesia rubecula? / De Boer, Jetske G.; Kuijper, Bram; Heimpel, George E.; Beukeboom, Leo W.

In: Evolutionary Applications, Vol. 5, No. 5, 01.07.2012, p. 444-454.

Research output: Contribution to journalArticle

De Boer, Jetske G. ; Kuijper, Bram ; Heimpel, George E. ; Beukeboom, Leo W. / Sex determination meltdown upon biological control introduction of the parasitoid Cotesia rubecula?. In: Evolutionary Applications. 2012 ; Vol. 5, No. 5. pp. 444-454.
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