Variation and plasticity in life-history traits and fitness of wild Arabidopsis thaliana populations are not related to their genotypic and ecological diversity

IF 3.4 Q1 Agricultural and Biological Sciences
Raul de la Mata, Almudena Mollá-Morales, Belén Méndez-Vigo, Rafael Torres-Pérez, Juan Carlos Oliveros, Rocío Gómez, Arnald Marcer, Antonio R. Castilla, Magnus Nordborg, Carlos Alonso-Blanco, F. Xavier Picó
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引用次数: 0

Abstract

Despite its implications for population dynamics and evolution, the relationship between genetic and phenotypic variation in wild populations remains unclear. Here, we estimated variation and plasticity in life-history traits and fitness of the annual plant Arabidopsis thaliana in two common garden experiments that differed in environmental conditions. We used up to 306 maternal inbred lines from six Iberian populations characterized by low and high genotypic (based on whole-genome sequences) and ecological (vegetation type) diversity. Low and high genotypic and ecological diversity was found in edge and core Iberian environments, respectively. Given that selection is expected to be stronger in edge environments and that ecological diversity may enhance both phenotypic variation and plasticity, we expected genotypic diversity to be positively associated with phenotypic variation and plasticity. However, maternal lines, irrespective of the genotypic and ecological diversity of their population of origin, exhibited a substantial amount of phenotypic variation and plasticity for all traits. Furthermore, all populations harbored maternal lines with canalization (robustness) or sensitivity in response to harsher environmental conditions in one of the two experiments. Overall, we conclude that the environmental attributes of each population probably determine their genotypic diversity, but all populations maintain substantial phenotypic variation and plasticity for all traits, which represents an asset to endure in changing environments.
拟南芥野生种群生命史特征和适应性的变异和可塑性与其基因型和生态多样性无关
尽管野生种群的遗传变异和表型变异对种群动态和进化有影响,但两者之间的关系仍不清楚。在这里,我们在两个环境条件不同的普通花园实验中估测了一年生植物拟南芥生命史性状和适应性的变异和可塑性。我们使用了来自六个伊比利亚种群的多达 306 个母本近交系,这些种群的特点是基因型(基于全基因组序列)和生态(植被类型)多样性较低和较高。伊比利亚边缘环境和核心环境的基因型和生态多样性分别较低和较高。鉴于边缘环境中的选择作用会更强,而且生态多样性可能会增强表型变异和可塑性,我们预计基因型多样性与表型变异和可塑性呈正相关。然而,母本品系无论其原生种群的基因型和生态多样性如何,在所有性状上都表现出大量的表型变异和可塑性。此外,在两个实验中的一个实验中,所有种群的母本品系都具有渠化(稳健性)或对更恶劣环境条件的敏感性。总之,我们得出的结论是,每个种群的环境属性可能决定了它们的基因型多样性,但所有种群在所有性状上都保持了大量的表型变异和可塑性,这代表了一种在不断变化的环境中经久不衰的资产。
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来源期刊
BMC Evolutionary Biology
BMC Evolutionary Biology 生物-进化生物学
CiteScore
5.80
自引率
0.00%
发文量
0
审稿时长
6 months
期刊介绍: BMC Evolutionary Biology is an open access, peer-reviewed journal that considers articles on all aspects of molecular and non-molecular evolution of all organisms, as well as phylogenetics and palaeontology.
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