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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 21 to 22 of 22 (0.064 seconds)Spelling suggestions: "subject:"eex reversal"" "subject:"xex reversal""
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Reverze pohlaví u ještěra s genotypově určeným pohlavím (Squamata: Acrodonta: Pogona vitticeps) / Sex reversion in the lizard with genotypic sex determination (Squamata: Acrodonta: Pogona vitticeps)Ehl, Jan January 2015 (has links)
Sex determination among reptiles is a very variable matter across it's taxa. We meet there temperature sex determination and genotypic sex determination with many independent transitions between them. It is a group suitable to study evolution of sex determination, sex chromosomes and sex determination genes. Rare cases of sex reversal caused by extreme incubation temperature or exogenous hormones have been reported in recent years. In case of Acrodont lizard, Pogona vitticeps, was reported sex reversal caused by high incubation temperatures. Our purpose was to repeat the experiment, mainly due to insufficient conclusiveness of used methods. We wanted to expand the experiment by hormonal reversal, studying persistence of sex reversal to maturity and fertility of reversed individuals. We managed successfully to demonstrate sex reversal in both treatments by histological examination. Individuals with discordant phenotypic and genotypic sex were breed till one year of life, which demonstrate persistence of reversal. Our outcomes are concordant with most recent work on this species and show full functional phenomenon of sex reversal with reptiles, which studying could contribute to our understanding of evolution of sex determination.
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Quantitative and molecular genetic studies on temperature-dependent sex determination of Nile tilapia (<i>Oreochromis niloticus</i>) / Quantitativ- und molekulargenetische Studien zur temperaturabhängigen Geschlechtsdetermination von Niltilapien (<i>Oreochromis niloticus</i>)Lühmann, Liane-Magdalena 02 February 2012 (has links)
No description available.
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