Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/62603
Title: Inbreeding and thermal adaptation in Drosophila subobscura
Author: Zivanovic, Goran
Arenas Solà, Concepción
Mestres i Naval, Francesc
Keywords: Genètica
Drosòfila
Adaptació (Biologia)
Consanguinitat
Genetics
Drosophila
Adaptation (Biology)
Consanguinity
Issue Date: 10-Dec-2014
Publisher: NRC Research Press
Abstract: Using a well-adapted Drosophila subobscura population (Avala, Serbia), a drastic experiment of inbreeding was carried out to assess whether the expected level of homozygosity could be reached or if other evolutionary forces affected the process. In general, no significant changes of inversion (or arrangement) frequencies were detected after 12 brother <br>sister mating generations. Furthermore, no significant differences were obtained between observed and expected (under the inbreeding model) karyotypic frequencies. Thus, these results seemed to indicate that the main evolutionary factor in the experiment was inbreeding. However, in the G12 generation, complete chromosomal fixation was reached only in two out of the eight final inbred lines. In these lines, the chromosomal compositions were difficult to interpret, but they could be likely a consequence of adaptation to particular laboratory conditions (constant 18 °C, food, light period, etc.). Finally, in a second experiment, the inbred lines presented higher fertility at 18 °C than at 13 °C. Also, there was a significant line effect on fertility: inbred line number 6 (A1, J1, U1+2; U1+2+6, E8, and O3+4+7) presented the highest values, which maybe the result of an adaptation to laboratory conditions. Thus, the results obtained in our experiments reflect the adaptive potential of D. subobscura inversions.
Note: Versió postprint del document publicat a: http://dx.doi.org/10.1139/gen-2014-0149
It is part of: Genome, 2014, vol. 57, num. 9, p. 481-488
Related resource: http://dx.doi.org/10.1139/gen-2014-0149
URI: http://hdl.handle.net/2445/62603
ISSN: 0831-2796
Appears in Collections:Articles publicats en revistes (Genètica, Microbiologia i Estadística)

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