Překlad názvu: Effects of dispersal and local processes on genetic structure of populations Daphnia curvirostris and Daphnia pulex: genetic variability within and among river flood-plains
Autoři: Repovský, Marek ; Seďa, Jaromír (oponent) ; Černý, Martin (vedoucí práce)
Typ dokumentu: Diplomové práce
Rok: 2008
Jazyk: slo
Abstrakt: - 3 - Abstract Only a few studies have compared patterns of genetic variation among populations of different Daphnia species in the case of natural systems of river catchments. We assumed that as a result of dendritic nature of rivers and streams, the most genetic differentiation should be found between populations from different catchments and the least should be in the same sub-catchment. This is beacause it is much easier for animals restricted to passive dispersal via stream channel to disperse between adjacent streams in the same sub-catchment than between catchments. Using allozyme data based on six polymorphic enzyme loci, we present an analysis of genetic differentiation among 45 Daphnia curvirostris and 39 Daphnia pulex populations, separated by less than 100 m to more than 500 km from each other. The genetic population structure of the two species was strikingly similar, consistent with their similar metapopulation ecology. The mean FST value (differentiation within populations) was 0.32 and 0.30 and a hierarchical analysis showed that most genetic differentiation was between populations (68 and 70 %), less was present among populations within catchments (26 and 19 %) and the least was present among whole catchments (6 and 11 %). In spite of the large range of geographic distances, there was only...

Instituce: Fakulty UK (VŠKP) (web)
Informace o dostupnosti dokumentu: Dostupné v digitálním repozitáři UK.
Původní záznam: http://hdl.handle.net/20.500.11956/5460

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-272248


Záznam je zařazen do těchto sbírek:
Školství > Veřejné vysoké školy > Univerzita Karlova > Fakulty UK (VŠKP)
Vysokoškolské kvalifikační práce > Diplomové práce