Single-locus complementary sex determination absent in Heterospilus prosopidis (Hymenoptera: Braconidae)

Z. Wu, K. R. Hopper, P. J. Ode, R. W. Fuester, M. Tuda, G. E. Heimpel

研究成果: Contribution to journalArticle査読

17 被引用数 (Scopus)

抄録

In the haplodiploid Hymenoptera, haploid males arise from unfertilized eggs, receiving a single set of maternal chromosomes while diploid females arise from fertilized eggs and receive both maternal and paternal chromosomes. Under single-locus complementary sex determination (s/-CSD), sex is determined by multiple alleles at a single locus. Sex locus heterozygotes develop as females, while hemizygous and homozygous eggs develop as haploid and diploid males, respectively. Diploid males, which are inviable or sterile in almost all cases studied, are therefore produced in high frequency under inbreeding or in populations with low sex allele diversity. CSD is considered to be the ancestral form of sex determination within the Hymenoptera because members of the most basal taxa have CSD while some of the more derived groups have other mechanisms of sex determination that produce the haplo-diploid pattern without penalizing inbreeding. In this study, we investigated sex determination in Heterospilus prosopidis Viereck, a parasitoid from a relatively primitive subfamily of the Braconidae, a hymenopteran family having species with and without CSD. By comparing sex ratio and mortality patterns produced by inbred and outbred females, we were able to rule out s/-CSD as a sex determination mechanism in this species. The absence of s/-CSD in H. prosopidis was unexpected given its basal phylogenetic position in the Braconidae. This and other recent studies suggest that sex determination systems in the Hymenoptera may be evolutionary labile.

本文言語英語
ページ(範囲)228-234
ページ数7
ジャーナルHeredity
95
3
DOI
出版ステータス出版済み - 9 2005

All Science Journal Classification (ASJC) codes

  • Genetics
  • Genetics(clinical)

フィンガープリント 「Single-locus complementary sex determination absent in Heterospilus prosopidis (Hymenoptera: Braconidae)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル