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Human biological variation in the light of certain morphological and molecular biological traits.
Kujanová, Martina ; Černý, Viktor (advisor) ; Sládek, Vladimír (referee) ; Munclinger, Pavel (referee)
This doctoral thesis is submitted in the form of science publications with impact factor and presents human biological variation in two different ways. The first part is the study of phenotype variation focused on the degree of limb bones bilateral asymmetry. Besides genetic and hormonal factors asymmetry may develop as a response to biomechanical and to environmental factors influencing the individual/population. Therefore this trait can be considered as a measure of person's living conditions, health or environmental stress of different origin or exa- mine the effects of behavioral distinctions as sexual division of labor and diffe- rences in subsistence strategy. The submitted publication (Kujanová et al., 2008) is based on samples of two diachronic populations (medieval and recent) from Bohe- mia with different expected levels of health/environmental stress. The study is fo- cused especially on these aspects that may be indicative of various stresses, such as malnutrition or other nonspecific factors influencing health of persons living in the studied populations. According to the results we propose that bilateral asymmetry observed in the diachronic populations showed some differences supporting the theory that the medieval population was not subjected to as highly stressful condi- tions as the...
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Recently active L1 and B1 retrotransposons in the mouse genome
Janoušek, Václav ; Munclinger, Pavel (advisor) ; Bryja, Josef (referee)
The work focuses on two recently active retrotransposon families in the house mouse genome. They are L1 and B1 retrotransposons. The aim of the work was to find polymorphic retrotransposon insertions caused by their recent activity. Two genomes of mouse inbred strains derived from the different house mouse subspecies were compared. The BACends from MSM/Ms derived from M. m. molossinus were compared with the reference genome of C57BL/6J derived mostly from M. m. domesticus. The set of output insertions was classified into several subfamilies of B1 a L1 families. The presence/absence of these insertions was tested using PCR in all three house mouse subspecies and also in two sister species (M. spretus and M. macedonicus). The particular subfamilies differed with regard to presence in latter species. Despite the supposed lack of activity of older L1 families (F2 and F3) they persist in house mouse population as an ancestral polymorphism. Unlike L1 subfamilies, B1 subfamilies appear to be active in house mouse genome for longer period of time. Also the difference between the whole families L1 and B1was observed. Thus, according to my data L1 family seems to be recently more active than B1 family.
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Genetic conflicts and speciation
Kropáčková, Lucie ; Munclinger, Pavel (referee) ; Reifová, Radka (advisor)
In this thesis I'll examine the role of genetic conflicts in the origin of new species. Genetic conflicts can lead to an origin of reproductive barrier between the emerging species, especially postzygotic reproductive isolation. An example of such conflict could be meiotic drive on sex chromosomes, which distort sex ratio and seems to act a role in a hybrid male sterility. Another example may be genomic imprinting causing an abnormal placenta and embryo development in interspecies hybrids. Coevolution between cytoplasmic and nuclear genes can cause sterility of pollen in hybrids from plants. Similarly, the intracellular bacterium Wolbachia induces cytoplasmic incompatibility in animals. Mobilization of transposons may also lead to hybrid dysgenesis.
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Gentic structure of isolated populations of the Scarlet rosefinch (Caprodacus erythrinus)
Šašková, Lucie ; Munclinger, Pavel (advisor) ; Bryja, Josef (referee)
Diplomová práce se zabývá původem a demografickými charakteristikami geograficky izolovaných, nedávno vzniklých populací hýla rudého (Carpodacus erythrinus) na západním okraji areálu druhu. Práce je zalo.ena na nově získaných sekvencích dvou úseků mitochondriální DNA (410 páru bazí dlouhá sekvence kontrolní oblasti a 1029 dlouhá sekvence genu ND2) zji.těných u 82 jedinců ze 13 lokalit a jejich srovnáním s publikovanými sekvencemi z kontinuálního areálu. Zjistila jsem, .e geograficky izolované populace ze střední a severní Evropy nejsou významně geneticky izolované od populací kontinuálního areálu. Nově vzniklé populace také vykazují překvapivě vysokou diverzitu srovnatelnou s asijskými populacemi. Tato zji.tění nasvědčují intenzivnímu toku genů mezi populacemi zprostředkovanému pravděpodobně převá.ně disperzí mladých ptáků před prvním zahnízděním. Navzdory intenzivnímu toku genů mezi kontinuálním areálem a středo- a severoevropskými izolovanými populacemi hýli z Kavkazu, Bulharska a Turecka utvořili jasně oddělenou skupinu, která byla podpořena na základě několika typů analýz. Zdá se tedy, .e jedinci z těchto oblastí mohou mít vlastní oddělené zimovi.tě, komunikují jen minimálně se zbytkem areálu a díky tomu jsme zde zřejmě svědky počínající speciace. Klíčová slova: Hýl rudý (Carpodacus...
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