Demographic history of european populations of Arabidopsis thaliana.
Demographic history of european populations of Arabidopsis thaliana.
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DOI：
10.1371/journal.pgen.1000075
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发表时间：
2008-05-16
期刊：
影响因子：
4.5
通讯作者：
Rosenberg NA
中科院分区：
文献类型：
--
作者：
François O;Blum MG;Jakobsson M;Rosenberg NA
模式植物拟南芥成功地在最近经历了人为干扰的土地上定居。为了研究A.thaliana的史前传播，我们应用了近似贝叶斯计算和显式空间模型对76个欧洲材料进行了876个核基因座的测序。我们发现有证据表明，从东到西发生了一次主要的迁徙浪潮，影响了大多数抽样的个体。纵向坡度似乎是10,000年前该植物从∼东部向欧洲扩散的结果，向西扩散的速度为∼0.9公里/年。这种向前推进的模式与来自东部冰川避难所的自然殖民是一致的，这种自然殖民压倒了古老的西方血统。然而，该模型的速度和时间框架也表明，在新石器时代的过渡时期，刺参迁徙到欧洲可能伴随着农业的传播。在植物物种拟南芥中形成遗传变异模式的人口统计学力量为利用这一模式生物理解植物自然变异的遗传决定因素提供了重要的背景。我们使用新的种群遗传学工具结合分子和地理数据研究了拟南星天牛的人口学历史。我们推测，柳杉从东方进入欧洲，并以每年∼0.9公里的速度向西传播，其种群规模在大约10,000年前开始增加。这些结果提出的“前进浪潮”模型可能与该物种在最近一次冰川末期冰川消退后定居欧洲时预期的模式一致。或者，这也符合A.thaliana--一种杂草物种--可能随着农业的扩散而扩散到欧洲的可能性，为A.Crosby所描述的“生态帝国主义”现象提供了一个例子。在这一框架下，正如欧洲人类殖民时期来自欧洲的杂草入侵世界温带地区一样，起源于农业源头地区的杂草由于农业传播造成的干扰而入侵欧洲。
The model plant species Arabidopsis thaliana is successful at colonizing land that has recently undergone human-mediated disturbance. To investigate the prehistoric spread of A. thaliana, we applied approximate Bayesian computation and explicit spatial modeling to 76 European accessions sequenced at 876 nuclear loci. We find evidence that a major migration wave occurred from east to west, affecting most of the sampled individuals. The longitudinal gradient appears to result from the plant having spread in Europe from the east ∼10,000 years ago, with a rate of westward spread of ∼0.9 km/year. This wave-of-advance model is consistent with a natural colonization from an eastern glacial refugium that overwhelmed ancient western lineages. However, the speed and time frame of the model also suggest that the migration of A. thaliana into Europe may have accompanied the spread of agriculture during the Neolithic transition. The demographic forces that have shaped the pattern of genetic variability in the plant species Arabidopsis thaliana provide an important backdrop for the use of this model organism in understanding the genetic determinants of plant natural variation. We investigated the demographic history of A. thaliana using novel population-genetic tools applied to a combination of molecular and geographic data. We infer that A. thaliana entered Europe from the east and spread westward at a rate of ∼0.9 kilometers per year, and that its population size began increasing around 10,000 years ago. The “wave-of-advance” model suggested by these results is potentially consistent with the pattern expected if the species colonized Europe as the ice retreated at the end of the most recent glaciation. Alternatively, it is also compatible with the possibility that A. thaliana—a weedy species—may have spread into Europe with the diffusion of agriculture, providing an example of the phenomenon of “ecological imperialism” described by A. Crosby. In this framework, just as weeds from Europe invaded temperate regions worldwide during European human colonization, weeds originating from the source region of farming invaded Europe as a result of the disturbance caused by the spread of agriculture.
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10.1111/j.1095-8312.1999.tb01160.x
发表时间：
1999-09-01
影响因子：
1.9
作者：
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通讯作者：
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通讯作者：
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发表时间：
2007-09-01
期刊：
MOLECULAR ECOLOGY NOTES
影响因子：
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作者：
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通讯作者：
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