+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

No evidence for increased extinction proneness with decreasing effective population size in a parasitoid with complementary sex determination and fertile diploid males



No evidence for increased extinction proneness with decreasing effective population size in a parasitoid with complementary sex determination and fertile diploid males



Bmc Evolutionary Biology 10: 366



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. By manipulating the relatedness of the founders, we established replicated experimental populations of the parasitoid C. glomerata differing in their genetic effective size, and thus in allelic richness at the sex-determining locus and in the expected magnitude of diploid male production. Our long-term survey of population welfare and persistence did not provide evidence for increased proneness to population extinction with decreasing initial genetic effective population size. Most recorded surrogates of fitness nevertheless decayed over time and most experimental populations eventually went extinct, suggesting that the negative effects of inbreeding outweighed any premium from the fertility of diploid males. The fertility of diploid males may have evolved as an adaptation prompted by the risk of extinction looming over small isolated populations of species with sl-CSD. However, fertility of diploid males does not negate the costs imposed by their production, and although it may temporarily stave off extinction, it is not sufficient to eradicate the negative effects of inbreeding.

(PDF emailed within 0-6 h: $19.90)

Accession: 037448454

Download citation: RISBibTeXText

PMID: 21110868

DOI: 10.1186/1471-2148-10-366


Related references

Sterile males in a parasitoid wasp with complementary sex determination: from fitness costs to population extinction. Bmc Ecology 15: 13, 2015

No need to discriminate? Reproductive diploid males in a parasitoid with complementary sex determination. Plos One 4(6): E6024, 2009

Unexpectedly low frequencies of diploid males in an inbreeding parasitoid with complementary sex determination. Biological Journal of the Linnean Society 108(1): 79-86, 2013

Complementary sex determination substantially increases extinction proneness of haplodiploid populations. Proceedings of the National Academy of Sciences of the United States of America 102(30): 10742-6, 2005

Effective population size in Hymenoptera with complementary sex determination. Heredity: an international journal of genetics 93(6): 627-630, 2004

Increased Probability of Extinction Due to Decreased Genetic Effective Population Size: Experimental Populations of Clarkia Pulchella. Evolution; International Journal of Organic Evolution 51(2): 354-362, 1997

Increased probability of extinction due to decreased genetic effective population size: Experimental populations of Clarkia pulchella. Evolution 51(2): 354-362, 1997

Histological evidence that diploid hybrids of Cobitis taenia and C. elongatoides (Teleostei, Cobitidae) develop into fertile females and sterile males. Hydrobiologia 814(1): 147-159, 2018

Functionally reproductive diploid and haploid males in an inbreeding hymenopteran with complementary sex determination. Proceedings of the National Academy of Sciences of the United States of America 101(28): 10374-9, 2004

Diploid males in the bumble bee Bombus terrestris Hymenoptera karyotype analyses of diploid females, diploid males and haploid males. Japanese Journal of Entomology 63.1 (March 25): 203-207, 1995

Diploid males in the bumble bee Bombus terrestris karyotype analyses of diploid females, diploid males and haploid males. Japanese Journal of Entomology 63(1): 203-207, 1995

Population-level consequences of complementary sex determination in a solitary parasitoid. Bmc Evolutionary Biology 15: 98, 2015

Fertile diploid males in the ant Cataglyphis cursor a potential cost of thelytoky?. Behavioral Ecology and Sociobiology 67(12): 1983-1993, 2013

Population structure, genetic effective size, mutation accumulation and extinction. Ecological Society of America Annual Meeting Abstracts 86: 113, 2001

Genetic variability and effective population size when local extinction and recolonization of subpopulations are frequent. Proceedings of the National Academy of Sciences of the United States of America 77(11): 6710-6714, 1980