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National Repository of Grey Literature

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Physiological mechanisms of aging in maless of model insect species PROVAZNÍK, Jan Trade-off between reproduction and longevity is a widely accepted fact, yet proximate mechanisms are scarcely understood. In this work I tested differences in lifespan between diapause and non-diapause males of a model insect, the linden bug Pyrrhocoris apterus. Also the role of juvenile hormone in regulation of longevity and immunity (measured by relative phenoloxidase activity) was assessed. In addition to that, I examined if juvenile hormone is the mediator of reduction in longevity induced by mating. Detailed record

Identification of Z-linked genes for the study of sex chromosome evolution in Lepidoptera PROVAZNÍK, Jan Moths and butterflies (Lepidoptera) have a WZ/ZZ (female/male) sex chromosome system or its numerical variants. The non-recombining W chromosome is largely formed by heterochromatin, composed of repetitive DNA and almost free of genes. Its use for evolutionary studies is thus limited due to fast molecular divergence. Whereas the Z chromosome resembles to autosomes; it is rich in genes and thus expected to be more conserved. In this study, the Z-linked genes with available DNA sequence information are summarized in order to give reference to suitable candidates for the study on evolutionary history of sex chromosomes in Lepidoptera. The use of Zlinked genes to test current hypotheses on the origin of the lepidopteran W chromosome is also discussed. Detailed record

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10	PROVAZNÍK, Jan

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