BIOREpository (Faculty of Biology, University of Belgrade)
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Ecological preferences and new data on distribution of perlid stonefly Dinocras megacephala (Klapálek, 1907) in Serbia
No full textM3
Identification of Y-chromosome Turnover in Newts Fails to Support a Sex Chromosome Origin for the Triturus Balanced Lethal System
No full textNon-recombining regions often have profound effects on genome evolution, resulting in structures such as sex chromosomes and supergenes. Amongst the strangest examples are balanced lethal systems, such as that found in newts of the genus Triturus. These systems halve reproductive output, and the evolution of such a deleterious trait is difficult to explain. For Triturus, an intriguing model proposes that the balanced lethal system evolved from an ancestral Y-chromosome. To test this hypothesis, we identify the Y-chromosome of Triturus and verify whether it, or the balanced lethal system, is homologous to the Y-chromosome of its sister genus Lissotriton, which does not possess the balanced lethal system. We identify a set of candidate Y-linked markers in Triturus ivanbureschi and validate the male specificity of the markers in all major clades of Triturus. We place the Y-linked markers on a high-density linkage map of T. ivanbureschi that we construct with 7,233 RADseq markers. We then place both the Triturus and Lissotriton Y-linked regions within previously constructed target capture linkage maps that include genes linked to the balanced lethal system. We observe that neither the Triturus balanced lethal system, nor the Triturus Y-chromosome are homologous to the Lissotriton Y-chromosome. This is the first molecular evidence of a transition between Y-chromosome systems within salamanders. However, unless additional sex chromosome turnover events are involved, our data does not support a sex chromosome origin of the balanced lethal system.M213.217
FIRST RECORD OF PONTOBELGRANDIELLA RADOMAN, 1978 (GASTROPODA: TRUNCATELLOIDEA: HYDROBIIDAE) IN SERBIA MARKS THE WESTERNMOST BORDER OF THE GENUS’ DISTRIBUTION
No full textIn this paper we report the first record of the genus Pontobelgrandiella from Serbia, which considerably extends its distribution to the west. The morphology of the specimens found is described and they were compared with other similar taxa. Although our specimens showed some morphological differences from other taxa, we refrained from describing a new species due to the current problems in this group and the limited significance of shell features. Reporting populations of endangered gastropods may increase the chances of their better description and more accurate identification as well as contribute to their protection and the conservation of their habitats.M2418619033
Impact of seven-day regimen of intermittent theta burst stimulation (iTBS) on dendritic spine morphology and structural plasticity
No full textBrain Stimulation 18(1):409-410M3
Length-weight relationship of brown trout (Salmo trutta) from different river systems in Serbia
No full text363-368M3
Implications of mitonuclear interactions for the Trojan Female Technique in pest biocontrol: A case study on the seed beetle Acanthoscelides obtectus
No full textThe seed beetle (Acanthoscelides obtectus) is a pest of common beans and other legumes that causes considerable losses of stored products. Its populations are universally regulated with insecticides, but novel, safer and more efficient methods of control are needed. One such method is the Trojan Female Technique (TFT) which is based on the existence of male harming/female benign mitochondrial haplotypes. The introduction of females carrying haplotypes with male-specific negative effect into the target population can lead to its self-perpetuating suppression over generations. Due to the coevolution of mitochondrial and nuclear genomes, it is possible for nuclear variants that compensate for the negative effects of male harming mitochondrial haplotypes to evolve. Therefore, one of the requirements for the applicability of TFT is that candidate mitochondrial haplotypes confer their negative effects on males in diverse nuclear backgrounds. In this study, we used the previously described mitochondrial haplotype, MG3b, which reduces male-only fertility, and placed it in a range of nuclear backgrounds from three different natural populations. The goal was to test whether its effects on male and female fertility are dependent on interactions with different nuclei. Our results showed that MG3b consistently decreases male fertility independently of the nuclear environments, while having no negative effect on females. Additionally, we found no statistically significant effect of mitonuclear interactions, suggesting that there is no standing variation of compensatory mutations in nuclear backgrounds. These results indicate that the MG3b haplotype could be used in the TFT in different natural seed beetle populations.M212,710259511
Finding the Right Host in the Darkness of the Cave-New Insights into the Ecology and Spatio-temporal Dynamics of Hyperparasitic Fungi (Arthrorhynchus nycteribiae, Laboulbeniales)
No full textThe aim of this study was to determine the presence of the hyperparasitic fungus Arthrorhynchus nycteribiae and to analyze its spatio-temporal pattern in the two bat flies (Penicillidia conspicua and P. dufourii) parasitizing on bats. We collected 612 samples of bat flies from 400 bats in 20 caves in the Central Balkans. Hyperparasite was identified based on morphological and molecular analyses of rDNA genes (LSU and SSU). A. nycteribiae was reported for the first time in Bosnia and Herzegovina and Montenegro, and confirmed in Serbia. Of the 20 sites examined, we found A. nycteribiae at 11 sites. The prevalence of A. nycteribiae infection in the bats examined was approximately 17%. Miniopterus schreibersii harbored the highest number of bat flies and was the only bat species hosting the infected bat flies of the species P. conspicua. Our results showed significant differences in infection patterns during the different seasons: the highest prevalence of bat flies with hyperparasitic fungi was found in the summer season (23%) and the lowest in spring (2%). Female bat fly hosts showed a significantly higher prevalence of infection than male bat flies. This study makes an important contribution to the knowledge of the distribution of A. nycteribiae and to the understanding of complex parasite-host relationships in the poorly studied areas of the Central Balkans.M21a3.32388
