“…We confirmed by cytological analysis that S. venezuelensis produces eggs by parthenogenesis during the parasitic stage of its life cycle. …”
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“…Parthenogenesis is a natural form of asexual reproduction in which embryos develop in the absence of fertilisation. …”
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“…The present results provide insights for the haploid parthenogenesis induction process.…”
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“…To uncover the genomic changes associated with the evolution of parthenogenesis in this nematode, we carried out a genome analysis. …”
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“…SIMPLE SUMMARY: Bristletails (Insecta: Microcoryphia) are primarily wingless insects, some of which have been found to exhibit parthenogenesis. In the genus Coreamachilis, parthenogenesis occurs in C. coreanus, whereas sexual reproduction is found in C. songi. …”
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“…Parthenogenesis is an asexual form of reproduction, normally present in various animal and plant species, in which an embryo is generated from a single gamete. …”
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“…Moreover, three modes of reproduction are present in the phylum: obligatory sexuality, cyclical parthenogenesis, and obligatory ameiotic parthenogenesis. …”
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“…We report comprehensive evidence for obligatory thelytokous parthenogenesis in an ant Monomorium triviale. This species is characterized by distinct queen–worker dimorphism with strict reproductive division of labor: queens produce both workers and new queens without mating, whereas workers are completely sterile. …”
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“…In mammals, a new life starts with the fusion of an oocyte and a sperm cell. Parthenogenesis, a way of generating offspring solely from female gametes, is limited because of problems arising from genomic imprinting. …”
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“…This study provides confirmation for previous works and releases new genomic data that will contribute to future discoveries on the mechanisms of parthenogenesis as well as support comparative studies among reptiles.…”
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“…The effects on oocyte growth, nuclear progression, oocyte maturation, and embryonic development after parthenogenesis were examined. Insulin treatment during oocyte growth was found to have a positive effect on nuclear maturation, embryonic development after parthenogenesis, and the expansion of cumulus cells. …”
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“…It is not clear how these old parthenogens can escape the predicted long-term costs of parthenogenesis, but an obvious explanation is cryptic sex. …”
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“…Reproductive strategies are also diverse in this group of nematodes, employing not only sexual reproduction but also parthenogenesis, making it an attractive group to study genome adaptation to specific conditions. …”
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“…Commonly, a single aphid species exhibits a wide range of reproductive strategies including cyclical parthenogenesis and obligate parthenogenesis. Sex determination in aphids is chromosomal; females have two X chromosomes, while males have one. …”
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“…Because facultative parthenogenesis is a competing hypothesis to explain the production of offspring after prolonged separation from males, the identification of paternal alleles through genetic analysis is essential. …”
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“…In Hymenoptera, arrhenotokous parthenogenesis (arrhenotoky) is a common reproductive mode. …”
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“…Aphids detect photoperiod shortening by sensing the length of the night and switch from viviparous parthenogenesis in spring and summer, to oviparous sexual reproduction in autumn. …”
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“…METHODOLOGY/PRINCIPAL FINDINGS: We found that transitions to obligate parthenogenesis (OP) in the rotifer Brachionus calyciflorus, a small freshwater invertebrate which normally reproduces by cyclical parthenogenesis, were controlled by a simple Mendelian inheritance. …”
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“…Recent work suggests that switching from parthenogenesis to sex can be costly and that females can resist mating to avoid switching. …”
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“…To determine the mechanism of this mating strategy, we ruled out the involvement of reproduction manipulating endosymbionts by use of next generation sequencing data, thus suggesting that parthenogenesis is determined genetically and may have evolved as a means to assure reproduction. …”
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