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Author Lardies, M.A.; Arias, M.B.; Poupin, M.J.; Bacigalupe, L.D.
Title Heritability of hsp70 expression in the beetle Tenebrio molitor: Ontogenetic and environmental effects Type
Year 2014 Publication Journal Of Insect Physiology Abbreviated Journal J. Insect Physiol.
Volume 67 Issue Pages 70-75
Keywords Animal model; Tenebrio molitor; Thermal adaptation; Thermotolerance; Climate change; Half-sib design
Abstract Ectotherms constitute the vast majority of terrestrial biodiversity and are especially likely to be vulnerable to climate warming because their basic physiological functions such as locomotion, growth, and reproduction are strongly influenced by environmental temperature. An integrated view about the effects of global warming will be reached not just establishing how the increase in mean temperature impacts the natural populations but also establishing the effects of the increase in temperature variance. One of the molecular responses that are activated in a cell under a temperature stress is the heat shock protein response (HSP). Some studies that have detected consistent differences among thermal treatments and ontogenetic stages in HSP70 expression have assumed that these differences had a genetic basis and consequently expression would be heritable. We tested for changes in quantitative genetic parameters of HSP70 expression in a half-sib design where individuals of the beetle Tenebrio molitor were maintained in constant and varying thermal environments. We estimated heritability of HSP70 expression using a linear mixed modelling approach in different ontogenetic stages. Expression levels of HSP70 were consistently higher in the variable environment and heritability estimates were low to moderate. The results imply that within each ontogenetic stage additive genetic variance was higher in the variable environment and in adults compared with constant environment and larvae stage, respectively. We found that almost all the genetic correlations across ontogenetic stages and environment were positive. These suggest that directional selection for higher levels of expression in one environment will result in higher expression levels of HSP70 on the other environment for the same ontogenetic stage. (C) 2014 Elsevier Ltd. All rights reserved.
Address [Lardies, Marco A.] Univ Adolfo Ibanez, Fac Artes Liberales, Dept Ciencias, Santiago, Chile, Email: marco.lardies@uai.cl
Corporate Author Thesis
Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-1910 ISBN Medium
Area Expedition Conference
Notes WOS:000340326900009 Approved
Call Number UAI @ eduardo.moreno @ Serial 399
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