TY  - JOUR
TI  - Egg development in parthenogenetic nematodes: variations in meiosis and axis formation
AU  - Lahl, Vera
AU  - Sadler, Bernd
AU  - Schierenberg, Einhard
T2  - The International Journal of Developmental Biology
AB  - 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.
PY  - 2006
DO  - 10.1387/ijdb.052030vl
VL  - 50
IS  - 4
SP  - 393
EP  - 397
J2  - Int. J. Dev. Biol.
LA  - en
SN  - 0214-6282
SN  - 1696-3547
UR  - https://ijdb.ehu.eus/article/052030vl
Y2  - 2024/11/05/15:21:45
ER  -