Egg development in parthenogenetic nematodes: variations in meiosis and axis formation

The International Journal of Developmental Biology
Vera LahlEinhard Schierenberg

Abstract

In the well studied model nematode Caenorhabditis elegans entrance of the sperm induces an anterior-posterior polarity in the egg and determines the orientation of the primary embryonic axis. Subsequently, fusion of two haploid gamete nuclei results in a diploid zygote as a prerequisite for normal embryogenesis. Here we analyze the establishment of embryonic polarity and diploidy in the absence of sperm in three parthenogenetic nematode species from three different families, Diploscapter coronatus (Diploscapteridae), Acrobeloides nanus (Cephalobidae) and Plectus sp. (Plectidae). We find that they not only differ from C. elegans in these two aspects but also from each other, indicating variant solutions for the same developmental challenges and supporting the view that the parthenogenetic mode of reproduction has been acquired multiple times independently.

Citations

May 19, 2010·BMC Developmental Biology·Peter HegerEinhard Schierenberg
Jul 4, 2012·EvoDevo·Jens SchulzeEinhard Schierenberg
Apr 8, 2014·Biochemical and Biophysical Research Communications·Stuart A Newman
Oct 28, 2008·Biochimica Et Biophysica Acta·Michael Brauchle
May 11, 2011·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Stuart A Newman
Sep 21, 2011·EvoDevo·Jens Schulze, Einhard Schierenberg
Aug 1, 2009·Developmental Biology·Michael BrauchleFabio Piano
Apr 29, 2016·BMC Developmental Biology·Alejandro Calderón-UrreaGodelieve Gheysen
Sep 29, 2020·The Journal of Heredity·Kamil S JaronTanja Schwander
Sep 26, 2017·Current Biology : CB·Hélène FradinKristin C Gunsalus

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