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Mostrando ítems 11-20 de 98
Recreating the Follicular Environment: A Customized Approach for In Vitro Culture of Bovine Oocytes Based on the Origin and Differentiation State
(2021-01-01)
The mammalian ovary is a large source of oocytes organized into follicles at various stages of folliculogenesis. However, only a limited number of them can be used for in vitro embryo production (IVEP), while most have yet ...
Competition between meiotic and apomictic pathways during ovule and seed development results in clonality
(Wiley, 2013-01)
Meiotic and apomictic reproductive pathways develop simultaneously in facultative
aposporous species, and compete to form a seed as a final goal. This developmental competition
was evaluated in tetraploid genotypes of ...
The Effect of different vitrification and staining protocols on the visibility of the nuclear maturation stage of equine oocytes
(Elsevier Science Inc., 2020-07)
In this study, we compared two staining protocols assessing the nuclear chromatin stage of equine oocytes after vitrification using permeable and nonpermeable cryoprotectants. Slaughterhouse-derived oocytes (n = 155) were ...
Mitochondrial distribution and meiotic progression in canine oocytes during in vivo and in vitro maturation
(Elsevier, 2011)
The objective was to evaluate mitochondrial distribution, and its relationship to meiotic development, in canine oocytes during
in vitro maturation (IVM) at 48, 72, and 96 h, compared to those that were non-matured or in ...
In vitro growth and maturation of isolated caprine preantral follicles: Influence of insulin and FSH concentration, culture dish, coculture, and oocyte size on meiotic resumption
(Elsevier Science Inc, 2017)
The aims of this study were: (1) to evaluate the effect of different insulin concentrations, alone or in combination with either a fixed FSH concentration or increasing FSH concentrations on the in vitro culture of isolated ...
Competition between meiotic and apomictic pathways during ovule and seed development results in clonality
(Wiley Blackwell Publishing, Inc, 2013-01)
Meiotic and apomictic reproductive pathways develop simultaneously in facultative aposporous apomictic species, and compete to form a seed as final goal. This developmental competition was evaluated in tetraploid genotypes ...
Gene Expression in Bovine Oocytes and Cumulus Cells After Meiotic Inhibition with the Cyclin-Dependent Kinase Inhibitor Butyrolactone I
(WILEY-BLACKWELLHOBOKEN, 2012)
Contents The aim of this study was to determine the effect of temporary inhibition of meiosis using the cyclin-dependent kinase inhibitor butyrolactone I (BLI) on gene expression in bovine oocytes and cumulus cells. Immature ...
Gene expression in sheep cumulus-oocyte complexes meiotically inhibited with roscovitine
(2015-01-01)
The majority of mammalian oocytes destined for in vitro maturation (IVM) have not undergone all molecular and structural changes necessary for competence acquisition to support the fertilization and early embryogenesis. ...
Effect of Vitrification of Feline Ovarian Cortex on Follicular and Oocyte Quality and Competence
(Wiley-Blackwell, 2012-06-01)
Cryopreservation of ovarian cortex has important implications in the preservation of fertility and biodiversity in animal species. Slow freezing of cat ovarian tissue resulted in the preservation of follicular morphology ...