No evidence for increased extinction proneness with decreasing effective population size in a parasitoid with complementary sex determination and fertile diploid males |
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Authors: | Jan Elias Silvia Dorn Dominique Mazzi |
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Institution: | 1.ETH Zurich, Institute of Plant,Animal and Agroecosystem Sciences/Applied Entomology,Zurich,Switzerland |
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Abstract: | Background In species with single locus complementary sex determination (sl-CSD), the sex of individuals depends on their genotype at
one single locus with multiple alleles. Haploid individuals are always males. Diploid individuals are females when heterozygous,
but males when homozygous at the sex-determining locus. Diploid males are typically unviable or effectively sterile, hence
imposing a genetic load on populations. Diploid males are produced from matings of partners that share an allele at the sex-determining
locus. The lower the allelic diversity at the sex-determining locus, the more diploid males are produced, ultimately impairing
the growth of populations and jeopardizing their persistence. The gregarious endoparasitoid wasp Cotesia glomerata is one of only two known species with sl-CSD and fertile diploid males. |
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