在环境波动期间表型可塑性的演变.
Zuzana Sekajova1, Erlend I F Fossen1,2, Elena Rosa1
1Animal Ecology, Department of Ecology and Genetics, Uppsala, University, Uppsala, Sweden.
Journal of evolutionary biology
|June 11, 2025
概括
在可变的环境中,线虫虫进化了更大的身体尺寸可塑性,但不是投注对冲. 这项研究探索了温度波动中的进化策略.
科学领域:
- 进化生物学 进化生物学
- 环境科学 环境科学
- 遗传学 是一个遗传学.
背景情况:
- 可变的环境可以影响进化轨迹,可能有利于表型可塑性或对遗传道进行投注.
- 理论研究经常对塑性和投注对冲进行对比,但检查它们同时演变的经验研究很少.
- 了解这些适应策略对于预测物种对环境变化的反应至关重要.
研究的目的:
- 实证地研究表型可塑性和投注对冲的同时演变,以应对不同的温度变化模式.
- 为了比较进化的可塑性和线虫虫Caenorhabditis remanei中的投注对冲策略的适应意义.
- 评估基于常态遗传变异的进一步进化适应的潜力.
主要方法:
- 在两个不同的温度变化模式下,Caenorhabditis remanei 30 代的实验进化:快速周期和缓慢增长.
- 测量不同温度 (20°C和25°C) 的进化种群的成人体型和健康状况.
- 基于环境条件和后代表现的表型可塑性和投注对冲策略的分析.
主要成果:
- 快速温度周期的实验进化导致身体尺寸可塑性增加,与缓慢变化的环境相比.
- 在任何实验方案中都没有观察到注对冲的显著增加.
- 进化的可塑性遵循温度尺寸规则,并且具有适应性,发现了体型的大量基因变异.
结论:
- 快速的环境波动选择增加表型可塑性,特别是体型,在Caenorhabditis remanei.
- 在测试条件下,投注对冲策略不受青,这表明可塑性是一种更直接的适应性反应.
- 持续存在的基因变异表明了持续适应不断变化的环境的潜力.
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
181
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,...
181
Speciation Rates
21.1K
Overview
21.1K
Genetic Drift
39.5K
Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
39.5K
Mutation, Gene Flow, and Genetic Drift
58.2K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
58.2K
Gene Flow
34.9K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
34.9K


