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Accepted version

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2018-02-01

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/131316

Chromosomal Thermal Index: a comprehensive way to integrate the thermal adaptation of Drosophila subobscura whole karyotype

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https://doi.org/10.1139/gen-2017-0124

Abstract

Drosophila has demonstrated to be an excellent model to study the adaptation of organisms to global warming, with inversion chromosomal polymorphism having a key role in this adaptation. Here, we introduce a new index (Chromosomal Thermal Index or CTI) to quantify the thermal adaptation of a population according to its composition of 'warm' and 'cold' adapted inversions. This index is intuitive, has good statistical properties, and can be used to hypothesis on the effect of global warming on natural populations. We show the usefulness of CTI using data from European populations of D. subobscura, sampled in different years. Out of 15 comparisons over time, nine showed significant increase of CTI, in accordance with global warming expectations. Although large regions of the genome outside inversions contain thermal adaptation genes, our results show that the total amount of warm or cold inversions in populations seems to be directly involved in thermal adaptation, whereas the interactions between the inversions content of homologous and non-homologous chromosomes are not relevant.

Subject

Drosòfila subobscura, Cromosomes

Subject (English)

Drosophila subobscura, Chromosomes

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Articles publicats en revistes (Genètica, Microbiologia i Estadística)
Articles publicats en revistes (Institut de Recerca de la Biodiversitat (IRBio))

Citation

ARENAS SOLÀ, Concepción, ZIVANOVIC, Goran and MESTRES I NAVAL, Francesc. Chromosomal Thermal Index: a comprehensive way to integrate the thermal adaptation of Drosophila subobscura whole karyotype. Genome. 2018. Vol. 61, num. 2, pags. 73-78. ISSN 0831-2796. [consulted: 9 of August of 2026]. Available at: https://hdl.handle.net/2445/131316

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