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Induction of in vitro maturation in oocytes of Triturus (Amphibia Urodela)
No full textRecently, it has been made possible to induce in vitro oocyte maturation by progesterone in the urodele Triturus viridescens. The urodeles represent the animal group in which the morphology and the structure of the lampbrush chromosomes have been studied most extensively. The authors verified the possibility of inducing in vitro oocyte maturation in other species of urodeles, with the particular aim of investigating the morphological changes of the lampbrush chromosomes during the maturing period
Banding patterns on lampbrush chromosomes of Triturus marmoratus (Amphibia Urodela) by the Giemsa stain
No full textLampbrush chromosome preparations from the newt species Triturus marmoratus have been submitted to a banding procedure by using a Giemsa stain technique (C-banding) as well as variants of the method. Centromeres, most of telomeres, the nucleolus organizing region and some segments along the chromosome axes appear to be differently stained. The centromere positions have been indicated on the maps of the lampbrush complement of the species. The possible relationships between banding and chromosome structure and organization are briefly discussed
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