10.5061/DRYAD.9R4R7P1
Batista, Marcos R. D.
State University of Campinas
Penha, Rafael E. S.
State University of Campinas
Sofia, Silvia H.
Londrina State University
Klaczko, Louis B.
State University of Campinas
Data from: Comparative analysis of adaptive and neutral markers of
Drosophila mediopunctata populations dispersed among forest fragments
Dryad
dataset
2019
genetic biodiversity
Drosophila mediopunctata
present
tripunctata species group
Holocene
2019-11-22T00:00:00Z
2019-11-22T00:00:00Z
en
https://doi.org/10.1002/ece3.4696
98181 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Comparison of adaptive and neutral genetic markers is a valuable approach
to characterize the evolutionary consequences of populations living in
environments threatened by anthropogenic disturbances, such as forest
fragmentation. Shifts in allele frequencies, low genetic variability, and
a small effective population size can be considered clear signs of forest
fragmentation effects (due to genetic drift) over natural populations,
while adaptive responses correlate with environmental variables. Brazilian
Atlantic Forest had its landscape drastically reduced and fragmented. Now,
several forest remnants are isolated from each other by urban and crop
areas. We sampled Drosophila mediopunctata populations from eight forest
remnants dispersed on two adjacent geomorphological regions, which are
physiognomic and climatically quite distinct. Microsatellite data of
inversionāfree chromosomes (neutral genetic marker) indicate low
structuration among populations suggesting that they were panmictic and
greatly influenced by gene flow. Moreover, significant differences in
chromosomal inversion frequencies (adaptive genetic marker) among
populations and their correlations with climatic and geographical
variables indicate that genetic divergence among populations could be an
adaptive response to their environment. Nonetheless, we observed a
significant difference in inversion frequencies of a population in two
consecutive years that may be associated with edge and demographic
effects. Also, it may be reflecting seasonal changes of inversion
frequencies influenced by great temperature variation due to edge effects.
Moreover, the forest fragment size does not affect genetic variation of
neutral markers. Our data indicate that despite oscillations in
chromosomal inversion frequencies, D. mediopunctata populations from
Brazilian Atlantic Forest and their divergence may be driven by adaptive
factors to local differences, perhaps because it is a small flying insect
easily carried by the wind increasing its migration rates.
Raw data for chromosome inversionsIndividual karyotypes per locality. Each
locality is in a different page of the
file.raw-data-chrom-inv.xlsxRaw-data-ssrGenotypes for 12 microsatellite
loci in various locations.
Neotropical