Abstract：
Phenotypic plasticity can alter traits that are crucial to population establishment in a new environment, before adaptation can occur. How often phenotypic plasticity enables subsequent adaptive evolution is unknown, and examples of the phenomenon are limited. We investigated the hypothesis of plasticity-mediated persistence as a means of colonization of agricultural fields in one of the world\'s worst weeds, Raphanus raphanistrum ssp. raphanistrum. Using non-weedy native populations of the same species and subspecies as a comparison, we tested for plasticity-mediated persistence in a growth chamber reciprocal transplant experiment. We identified traits with genetic differentiation between the weedy and native ecotypes as well as phenotypic plasticity between growth chamber environments. We found that most traits were both plastic and differentiated between ecotypes, with the majority plastic and differentiated in the same direction. This suggests that phenotypic plasticity may have enabled radish populations to colonize and then adapt to novel agricultural environments.
摘要：
表型可塑性可以改变在新环境中对种群建立至关重要的性状，在适应发生之前。表型可塑性能够实现后续适应性进化的频率是未知的，这种现象的例子是有限的。我们调查了可塑性介导的持久性的假设，作为世界上最糟糕的杂草之一的农田定殖的手段，Raphanusraphanistrumssp。raphanistrum.使用相同物种和亚种的非杂草本地种群作为比较，我们在生长室互惠移植实验中测试了可塑性介导的持久性。我们确定了杂草和天然生态型之间具有遗传分化的性状，以及生长室环境之间的表型可塑性。我们发现大多数性状都是可塑性的，并且在生态型之间有区别，与大多数塑料和分化方向相同。这表明表型可塑性可能使萝卜种群能够定殖，然后适应新的农业环境。
