Adaptive Role of Inversion Polymorphism of Drosophila subobscura in Lead Stressed Environment
2015
Аутори:
Kenig, BojanKurbalija Novičić, Zorana
Patenković, Aleksandra
Stamenković-Radak, Marina
Anđelković, Marko
Тип документа:
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт:
Local adaptation to environmental stress at different levels of genetic
polymorphism in various plants and animals has been documented through
evolution of heavy metal tolerance. We used samples of Drosophila
subobscura populations from two differently polluted environments to
analyze the change of chromosomal inversion polymorphism as genetic
marker during laboratory exposure to lead. Exposure to environmental
contamination can affect the genetic content within a particular
inversion and produce targets for selection in populations from
different environments. The aims were to discover whether the inversion
polymorphism is shaped by the local natural environments, and if lead as
a selection pressure would cause adaptive divergence of two populations
during the multigenerational laboratory experiment. The results showed
that populations retain signatures from past contamination events, and
that heavy metal pollution can cause adaptive changes in population.
Differences in inversion polymorphism between the two populations
increased over generations under lead contamination in the laboratory.
The inversion polymorphism of population originating from the more
polluted natural environment was more stable during the experiment, both
under conditions with and without lead. Therefore, results showed that
inversion polymorphism as a genetic marker reflects a strong signature
of adaptation to the local environment, and that historical demographic
events and selection are important for both prediction of evolutionary
potential and long-term viability of natural populations.
Извор:
Plos One, 2015, 10, UNSP e0131270
DOI: 10.1371/journal.pone.0131270
ISSN: 1932-6203