Natural populations of Daphnia magna have been found which are polymorphic for electrophoretic variants of supernatant malic dehydrogenase, esterase, and alkaline phosphatase. Using these enzyme variants as genetic markers it has been possible to demonstrate the absence of recombination during parthenogenetic reproduction. Genetic uniformity is expected within parthenogenetic clones derived fro...

Chevasco, Veronica Evolution and ecological aspects of parthenogenetic and sexual bagworm moths (Lepidoptera: Psychidae: Naryciinae) Jyväskylä: University of Jyväskylä, 2012, 50 p. (Jyväskylä Studies in Biological and Environmental Science ISSN 1456–9701, 242) ISBN 978-951-39-4808-5 (nid.) ISBN 978-951-39-4809-2 (PDF) Yhteenveto: Näkökulmia partenogeneettisten ja seksuaalisesti lisääntyvien pus...

Diploid parthenogenetically activated oocytes were obtained after gonadotropin-induced ovulation of virgin females of the LT/Sv (LT) inbred mouse strain. These oocytes cleave spontaneously and develop into blastocysts which implant in the uterus but die within a few days. We examined the developmental potential of nuclei from parthenogenetic embryos after transplantation into fertilized eggs. T...

Although more than 100 imprinted genes have already been identified in the mouse and human genomes, little is known about genomic imprinting in cattle. For a better understanding of these genes in cattle, parthenogenetically activated bovine blastocysts were transferred to recipient cows to obtain parthenotes, and fibroblasts derived from a Day 40 (Day 0 being the day of parthenogenetic activat...

Background: Parthenogenesis is the production of an embryo from a female gamete in the absence of any contribution from a male gamete, with or without the eventual development into an adult. In vivo, mammalian parthenogenesis is a rare event. Parthenogenesis can be efficiently induced in vitro with a variety of mechanical, chemical, and electrical stimuli in several species. Hydrostatic pressur...

Effects of different media (TCM 199 + BSA, TCM 199 + FCS, TCM 199 + NBCS, Whitten's medium + BSA) supplemented with estradiol-17beta and two isolated and everted follicle shells on MPF and MAP kinase activities and the sensitivity to parthenogenetic activation of pig oocytes were examined at the end of culture (48 h). Elevated (P < 0.05) activities of MAP kinase were recorded in metaphase II oo...

Genetically matched pluripotent embryonic stem (ES) cells generated via nuclear transfer or parthenogenesis (pES cells) are a potential source of histocompatible cells and tissues for transplantation. After parthenogenetic activation of murine oocytes and interruption of meiosis I or II, we isolated and genotyped pES cells and characterized those that carried the full complement of major histoc...

Avertin anaesthesia induced mouse eggs to become activated parthenogenetically. An increasing incidence of activation was observed when females were anaesthetized 6-5, 9 and 13 h after ovulation, reaching a maximum of 45.8 percent. In a spontaneously ovulating group approximately 12.5 percent of all the eggs ovulated, or 27.3 percent of all the eggs activated evoked a decidual response, and the...