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Lack of detectable genetic recombination on the X chromosome during the parthenogenetic production of female and male aphids

  • DINAH F. HALES (a1), ALEX C. C. WILSON (a2) (a3), MATHEW A. SLOANE (a1), JEAN-CHRISTOPHE SIMON (a4), JEAN-FRANÇOIS LEGALLIC (a4) and PAUL SUNNUCKS (a5)...
Abstract

We used polymorphic microsatellite markers to look for recombination during parthenogenetic oogenesis between the X chromosomes of aphids of the tribe Macrosiphini. We examined the X chromosome because it comprises ∼25% of the genome and previous cytological observations of chromosome pairing and nucleolar organizer (NOR) heteromorphism suggest recombination, although the same is not true for autosomes. A total of 564 parthenogenetic females of Myzus clones with three distinct reproductive modes (cyclical parthenogenesis, obligate parthenogenesis and obligate parthenogenesis with male production) were genotyped at three informative X-linked loci. Also, parthenogenetically produced males from clones encompassing the full range of male-producing reproductive strategies were genotyped. These included 391 Myzus persicae males that were genotyped at three X-linked loci and 538 males from Sitobion clones that were genotyped at five informative X-linked loci. Our results show no departure from clonality in parthenogenetic generations of aphids of the tribe Macrosiphini: no recombinant genotypes were observed in parthenogenetically produced males or females.

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Copyright
Corresponding author
Corresponding author. Tel: +612 9850 8136. Fax: +612 9850 8245. e-mail: dhales@rna.bio.mq.edu.au
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Genetics Research
  • ISSN: 0016-6723
  • EISSN: 1469-5073
  • URL: /core/journals/genetics-research
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