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	Symbionti Arsenophonus a Sodalis v kloších: analogie k systému Wigglesworthia a Sodalis v mouchách tsetse ŠOCHOVÁ, Eva This study provides a new comparative model of symbiosis in sheep ked to well-characterized tsetse fly symbiotic system. Distribution of symbiotic associates was revealed by transmission electron microscopy and their evolutionary origin was confirmed by reconstruction of their phylogenies. Using genomic data, it explores their metabolic contribution to host and sheds light on B-vitamin metabolism. Detailed record
	Evolution and genomics of symbionts in Hippoboscidae ŠOCHOVÁ, Eva Obligately blood-sucking parasites harbour symbiotic bacteria providing them B-vitamins and cofactors missing from their blood diet. Within Hippoboscoidea group (parasites of birds and mammals), tsetse flies as medically important vectors have been studied extensively while bat flies and louse flies tend to be neglected. This thesis is composed of two complementary manuscripts focused on phylogeny and origin of bacterial symbionts in Hippoboscidae family (manuscript 1) and their genome evolution (manuscript 2). First, phylogenetic approach was employed to determine lineages of obligate and facultative symbionts present in this group. Second, genomic and phylogenomic analyses were carried out to better understand evolution of obligate endosymbionts from the Arsenophonus genus in this group. Results of the two studies indicate that relationships between Hippoboscoidea and their symbionts are extremely dynamic with frequent replacements of obligate symbionts. This hypothesis is supported by both phylogenetic and genomic evidence, in particular, Arsenophonus endosymbionts of Hippoboscidae represent several distinct lineages (of likely different ages) with noticeable differences in genome features and metabolic capabilities. The data presented in this thesis thus greatly extend our knowledge about evolution and genomics of symbiotic bacteria in Hippoboscidae and bloodsucking hosts in general. Detailed record
	The intracellular symbionts of blood-feeding Diptera group Hippobosccoidea ŠOCHOVÁ, Eva Blood-sucking parasites from the Hippoboscoidea group (Insecta: Diptera) harbor symbiotic bacteria providing them with B-vitamins and cofactors missing from their blood diet. Although including medically important vectors such as tsetse flies, evolutionary history of symbiosis in the whole group is poorly understood. This thesis is focused on analysis of symbionts in the Hippoboscidae family (parasites of birds and mammals). Phylogenetic approach was employed to determine lineages of obligatory and facultative symbionts present in this group. Results of the study indicate that relationships between Hippoboscoidea and their symbionts are extremely dynamic with frequent replacements of obligate symbionts. To which extent is this dynamic evolutionary history of symbiotic systems in Hippoboscoidea caused by features of their parasitic lifestyle (e.g. host switches from mammals to birds) will be an interesting question for further studies. Detailed record

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