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

Published online by Cambridge University Press:  26 July 2002

DINAH F. HALES ,
ALEX C. C. WILSON ,
MATHEW A. SLOANE ,
JEAN-CHRISTOPHE SIMON ,
JEAN-FRANÇOIS LEGALLIC  and
PAUL SUNNUCKS
DINAH F. HALES
Affiliation:
Department of Biological Sciences, Macquarie University, NSW 2109, Australia
ALEX C. C. WILSON
Affiliation:
Division of Botany and Zoology, The Australian National University, ACT 0200, Australia Current address: Center for Population Biology, University of California, Davis, CA 95616, USA
MATHEW A. SLOANE
Affiliation:
Department of Biological Sciences, Macquarie University, NSW 2109, Australia
JEAN-CHRISTOPHE SIMON
Affiliation:
UMR Biologie des Organismes et des Populations Appliquée à la Protection des Plantes, INRA, Domain de la Motte BP35327, 35653 Le Rheu Cedex, France
JEAN-FRANÇOIS LEGALLIC
Affiliation:
UMR Biologie des Organismes et des Populations Appliquée à la Protection des Plantes, INRA, Domain de la Motte BP35327, 35653 Le Rheu Cedex, France
PAUL SUNNUCKS
Affiliation:
Department of Genetics, La Trobe University, VIC 3083, Australia
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Abstract

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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.

Type
Research Article
Information
Genetics Research , Volume 79 , Issue 3 , June 2002 , pp. 203 - 209
Copyright
© 2002 Cambridge University Press