Genetic variation in heat-stress tolerance among South American Drosophila populations
| Autor: | Lindsey C. Fallis, Theodore J. Morgan, Juan J. Fanara |
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| Rok vydání: | 2011 |
| Předmět: |
Otras Ciencias Biológicas
Population THERMOTOLERANCE Plant Science Environment Ciencias Biológicas Environment variable Genetic variation Genetics Animals Mean radiant temperature education Drosophila TEMPERATURE STRESS RESISTANCE Adaptive capacity education.field_of_study biology Ecology Genetic Variation General Medicine South America biology.organism_classification Variation (linguistics) Drosophila melanogaster Phenotype HEAT SURVIVAL Insect Science Animal Science and Zoology Female CIENCIAS NATURALES Y EXACTAS Heat-Shock Response |
| Zdroj: | Genetica. 139(10) |
| ISSN: | 1573-6857 |
| Popis: | Spatial or temporal differences in environmental variables, such as temperature, are ubiquitous in nature and impose stress on organisms. This is especially true for organisms that are isothermal with the environment, such as insects. Understanding the means by which insects respond to temperature and how they will react to novel changes in environmental temperature is important for understanding the adaptive capacity of populations and to predict future trajectories of evolutionary change. The organismal response to heat has been identified as an important environmental variable for insects that can dramatically influence life history characters and geographic range. In the current study we surveyed the amount of variation in heat tolerance among Drosophila melanogaster populations collected at diverse sites along a latitudinal gradient in Argentina (24°-38°S). This is the first study to quantify heat tolerance in South American populations and our work demonstrates that most of the populations surveyed have abundant within-population phenotypic variation, while still exhibiting significant variation among populations. The one exception was the most heat tolerant population that comes from a climate exhibiting the warmest annual mean temperature. All together our results suggest there is abundant genetic variation for heat-tolerance phenotypes within and among natural populations of Drosophila and this variation has likely been shaped by environmental temperature. Fil: Fallis, Lindsey C.. Kansas State University; Estados Unidos Fil: Fanara, Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina Fil: Morgan, Theodore J.. Kansas State University; Estados Unidos |
| Databáze: | OpenAIRE |
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