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Chromosoma

, Volume 32, Issue 3, pp 332–342 | Cite as

Oogenesis and chromosomal heterozygosity in the thelytokous midge, Lundstroemia parthenogenetica (Diptera, Chironomidae)

  • D. L. Porter
Article

Abstract

The thelytokous triploid midge Lundstroemia parthenogenetica (Diptera: Chironomidae:Chironominae), 3n = 9, is always found to be heterozygous for two inversions and a deletion. Parthenogenesis is maintained by an apomiotic restitutional oogenesis as found in the subfamily Orthocladiinae. This mechanism is compared with other groups exhibiting a restitutional or disordered first division. Possible modes of evolution of the apomictic restitutional system, origin of triploidy in apomictic forms, and chromosomal polymorphisms are discussed.

Keywords

Developmental Biology Chromosomal Polymorphism Apomictic Form Chromosomal Heterozygosity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1971

Authors and Affiliations

  • D. L. Porter
    • 1
  1. 1.Department of GeneticsUniversity of MelbourneAustralia

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