Survival of heat stress with and without heat hardening in Drosophila melanogaster:Interactions with larval density

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Survival of a potentially lethal high temperature stress is a genetically variable thermal adaptation trait in many organisms. Organisms cope with heat stress by basal or induced thermoresistance. Here, we tested quantitative trait loci (QTL) for heat stress survival (HSS) in Drosophila melanogaster...

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Detalles Bibliográficos
Autores principales: Arias, L.N., Sambucetti, P., Scannapieco, A.C., Loeschcke, V., Norry, F.M.
Formato: Artículo publishedVersion
Publicado: 2012
Materias:
High temperature stress
Quantitative trait loci
Thermal resistance
Thermotolerance
adaptation
animal
article
Drosophila melanogaster
genetics
heat
larva
phenotype
physiological stress
physiology
quantitative trait locus
Adaptation, Physiological
Animals
Hot Temperature
Larva
Phenotype
Quantitative Trait Loci
Stress, Physiological
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00220949_v215_n13_p2220_Arias
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00220949_v215_n13_p2220_Arias_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Survival of a potentially lethal high temperature stress is a genetically variable thermal adaptation trait in many organisms. Organisms cope with heat stress by basal or induced thermoresistance. Here, we tested quantitative trait loci (QTL) for heat stress survival (HSS) in Drosophila melanogaster, with and without a cyclic heat-hardening pre-treatment, for flies that were reared at low (LD) or high (HD) density. Mapping populations were two panels of recombinant inbred lines (RIL), which were previously constructed from heat stress-selected stocks: RIL-D48 and RIL-SH2, derived from backcrosses to stocks of low and high heat resistance, respectively. HSS increased with heat hardening in both LD and HD flies. In addition, HSS increased consistently with density in non-hardened flies. There was a significant interaction between heat hardening and density effects in RIL-D48. Several QTL were significant for both density and hardening treatments. Many QTL overlapped with thermotolerance QTL identified for other traits in previous studies based on LD cultures only. However, three new QTL were found in HD only (cytological ranges: 12E-16F6; 30A3-34C2; 49C-50C). Previously found thermotolerance QTL were also significant for flies from HD cultures. © 2012. Published by The Company of Biologists Ltd.

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