代际可塑性与温度依赖的选择对后代代谢率保持一致
Amanda K Pettersen1,2, Neil B Metcalfe2, Frank Seebacher1
1School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales 2006, Australia.
概括
父母的环境塑造了斑马鱼的后代代谢和生存. 适应性父母对后代代谢率的影响发生在父母和后代温度相匹配时,影响生存和生活节奏.
科学领域:
- 进化生物学是进化的生物学.
- 代谢率研究研究
- 现型性可塑性 现型性可塑性
背景情况:
- 代谢速率影响生命史特征和健康状况.
- 父母对后代代谢和生存的影响尚未完全理解.
研究的目的:
- 调查温度和养对斑马鱼后代的父母影响.
- 检查后代的表型,新陈代谢率和在不同温度下生存率.
主要方法:
- 斑马鱼的父母暴露在不同的温度 (24°C或30°C) 和养频率.
- 后代的表型,标准代谢率和生存率在24°C或30°C的发育温度下进行了评估.
主要成果:
- 来自低食物父母的后代的胚胎较大,但存活率较低.
- 从父母处于更高温度和较低食物的后代的代谢率较低.
- 较低的新陈代谢率与较慢的发育和生长相关,表明生活节奏较慢.
结论:
- 后代大小和新陈代谢的代际表型可塑性可以在父母和后代的温度相匹配时适应.
- 选择有利于在更高的温度下降低代谢,特别是来自低条件父母的后代.
- 适应性的父母影响是显而易见的,但取决于世代之间的环境条件匹配.
相关概念视频
Background and Environment Affect Phenotype
6.5K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.5K
Natural Selection and Adaptation
207
Natural selection, a fundamental concept in evolutionary biology, is the mechanism by which evolution is driven, favoring organisms that are best adapted to their environments. This process enhances their chances of survival and reproduction. Adaptation, a key outcome of this process, involves genetic modifications that optimize an organism's functionality under specific environmental challenges, such as extreme cold or thinner air at high altitudes.
Beyond physical adaptations,...
Beyond physical adaptations,...
207
Responses to Heat and Cold Stress
13.5K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.5K
Gene-Environment Interactions
320
Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
320
Factors Affecting Body Temperature
4.2K
As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
Factors may include:
Factors may include:
4.2K
Natural Selection and Mating Preferences
104
The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
Females, due to their biological roles in conception, pregnancy, and nursing,...
Females, due to their biological roles in conception, pregnancy, and nursing,...
104


