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Population specific fitness response of Drosophila subobscura to lead pollution

Insect Science 2013年第2期20卷 245-253页

作者： Bojan Kenig marina stamenkovic-radak Marko Andelkovic Institute for Biological Research Sinia Stankovic University of Belgrade Faculty of Biology University of Belgrade Serbian A cademy of Sciences and Arts Belgrade Serbia

Differences in heavy metal tolerance among separate populations of the same species have often been interpreted as local adaptation. Persistence of differences after removing the stressor indicates that mechanisms responsible for the increased tolerance were genetically determined. Drosophila subobscura Collin （Diptera： Drosophilidae） pop- ulations were sampled from two localities with different history of heavy metal pollution, and reared for eight generations in the laboratory on a standard medium and on media with different concentrations of lead （Pb）. To determine whether flies from different natural populations exposed to the Pb-contaminated media in the laboratory show population spe- cific variability in fitness components over generations, experimental groups with different concentrations of lead were assayed in three generations （F2, Fs, and Fs） for fecundity, de- velopmental time, and egg-to-adult viability. On the contaminated medium, fecundity was reduced in later generations and viability was increased, irrespective of the environmental origin of populations. For both populations, developmental time showed a tendency of slowing down on media with lead. Faster development was observed in later generations. Preadaptation to contamination, meaning higher fecundity, higher viability, and faster egg to adult development in all studied generations, was found in D. subobscura originating from the locality with a higher level of heavy metal pollution,

关键词： environmental background fitness components heavy metal interpopulation differences laboratory evolution local adaptation

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Mating behavior as an indicator of quality of Drosophila subobscura males？

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Insect Science 2017年第1期24卷 122-132页

作者： Marija Savic Veselinovic Sofija Pavkovic-Lucic Zorana Kurbalija Novicic Mihailo Jelic marina stamenkovic-radak Marko Andjelkovic Faculty of Biology University of Belgrade Belgrade Serbia Institute for Biological Research 'Sinisa Stankovic' University of Belgrade Belgrade Serbia Serbian Academy of Sciences and Arts Belgrade Serbia

According to current theoretical predictions, any deleterious mutations that reduce nonsexual fitness may have a negative influence on mating success. This means that sexual selection may remove deleterious mutations from the populations. Males of good genetic quality should be more successful in mating, compared to the males of lower genetic quality. As mating success is a condition dependent trait, large fractions of the genome may be a target of sexual selection and many behavioral traits are likely to be condition dependent. We manipulated the genetic quality of Drosophila subobscura males by inducing mutations with ionizing radiation and observed the effects of the obtained heterozygous mutations on male mating behavior： courtship occurrence, courtship latency, mating occurrence, latency to mating and duration of mating. We found possible effects of mutations. Females mated more frequently with male progeny of nonirradiated males and that these males courted females faster compared to the male progeny of irradiated males. Our findings indicate a possible important role of sexual selection in purging deleterious mutations.

关键词： condition dependence deleterious mutations female preference inbred lines ionizing radiation mutational load

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