Spatiotemporal dynamics of genetic variation at the quantitative and molecular levels within a natural Arabidopsis thaliana population
Spatiotemporal dynamics of genetic variation at the quantitative and molecular levels within a natural Arabidopsis thaliana population
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自然拟南芥种群内定量和分子水平遗传变异的时空动态
DOI：
10.1111/1365-2745.13981
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发表时间：
2022
影响因子：
5.5
通讯作者：
Picó, F. Xavier
中科院分区：
文献类型：
--
作者：
Méndez‐Vigo, Belén;Castilla, Antonio R.;Gómez, Rocío;Marcer, Arnald;Alonso‐Blanco, Carlos;Picó, F. Xavier
进化变化始于种群规模。因此，理解适应性变异需要在种群内水平上确定维持和形成常备遗传变异的因素。时空环境异质性是种群内遗传变异的生态驱动因素，决定了种群随随机过程的进化轨迹。本文主要研究了时空异质性对一年生植物拟南芥自然种群数量和分子变异的影响。我们从西班牙人身上抽取了1093个样本。泰国人口跨越10年（2012-2021）的7.4公顷。以279个母系为样本，在普通园林试验中估计了生活史性状和适合度的时空变化。我们利用核微卫星对884个个体进行基因分型，以估计遗传多样性的时空变化。我们通过估计性状的空间自相关性和精细尺度遗传结构来评估空间格局。分析了表型变异与地理位置、遗传亲缘关系的关系，以及环境适宜性和遗传稀有性对表型变异的影响。普通园林试验表明，植物生活史性状和适宜度的时间变异大于空间变异。尽管年份之间存在差异，但生态相关性状（如开花时间）的遗传距离与母系间的遗传距离呈正相关，而距离隔离的重要性较低。遗传多样性在近距离上表现出显著的空间结构，且在不同年份间具有一致性。最后，遗传稀有性，而不是环境适宜性，解释了生命史性状的遗传变异。我们的研究强调了重复采样在定量和分子水平上检测大量遗传多样性的重要性。泰国人口可以容纳。总体而言，从我们的长期监测方案（遗传亲缘性和遗传稀有性）估计的种群遗传属性，而不是生物（扩散）或生态（植被类型和环境适宜性）因素，成为种群内表型变异结构的最重要驱动因素。芥。
Evolutionary change begins at the population scale. Therefore, understanding adaptive variation requires the identification of the factors maintaining and shaping standing genetic variation at the within‐population level. Spatial and temporal environmental heterogeneity represent ecological drivers of within‐population genetic variation, determining the evolutionary trajectory of populations along with random processes. Here, we focused on the effects of spatiotemporal heterogeneity on quantitative and molecular variation in a natural population of the annual plantArabidopsis thaliana.We sampled 1093 individuals from a SpanishA. thalianapopulation across an area of 7.4 ha for 10 years (2012–2021). Based on a sample of 279 maternal lines, we estimated spatiotemporal variation in life‐history traits and fitness from a common garden experiment. We genotyped 884 individuals with nuclear microsatellites to estimate spatiotemporal variation in genetic diversity. We assessed spatial patterns by estimating spatial autocorrelation of traits and fine‐scale genetic structure. We analysed the relationships between phenotypic variation, geographical location and genetic relatedness, as well as the effects of environmental suitability and genetic rarity on phenotypic variation.The common garden experiment indicated that there was more temporal than spatial variation in life‐history traits and fitness. Despite the differences among years, genetic distance in ecologically relevant traits (e.g. flowering time) tended to be positively correlated to genetic distance among maternal lines, while isolation by distance was less important. Genetic diversity exhibited significant spatial structure at short distances, which were consistent among years. Finally, genetic rarity, and not environmental suitability, accounted for genetic variation in life‐history traits.Synthesis. Our study highlighted the importance of repeated sampling to detect the large amount of genetic diversity at the quantitative and molecular levels that a singleA. thalianapopulation can harbour. Overall, population genetic attributes estimated from our long‐term monitoring scheme (genetic relatedness and genetic rarity), rather than biological (dispersal) or ecological (vegetation types and environmental suitability) factors, emerged as the most important drivers of within‐population structure of phenotypic variation inA. thaliana.
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DOI：
--
发表时间：
2018
期刊：
Plant, Cell and Environment
影响因子：
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作者：
D. Tabas;B. Méndez‐Vigo;Noelia Arteaga;A. Marcer;A. Pascual;D. Weigel;F. Xavier Picó;C. Alonso‐Blanco
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DOI：
10.1073/pnas.1912451117
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2020-01
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11.1
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Alejandra Martínez-Berdeja;Michelle C. Stitzer;M. Taylor;M. Okada;E. Ezcurra;D. Runcie;J. Schmitt
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DOI：
--
发表时间：
1991
期刊：
影响因子：
--
作者：
G. Bell;M. Lechowicz
通讯作者：
M. Lechowicz
影响因子：
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作者：
Wilczek, Amity M.;Roe, Judith L.;Schmitt, Johanna
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Schmitt, Johanna
使用随机播种的拟南芥种子测量自然选择的空间变化
DOI：
--
发表时间：
1996
期刊：
影响因子：
--
作者：
D. Stratton;C. Bennington
通讯作者：
C. Bennington