• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Proceedings of the Royal Society B: Biological Sciences >Rapid adaptive divergence of life-history traits in response to abiotic stress within a natural population of a parthenogenetic nematode
【2h】

Rapid adaptive divergence of life-history traits in response to abiotic stress within a natural population of a parthenogenetic nematode

机译：孤雌生殖线虫自然种群中对非生物胁迫的响应生命历史特征的快速适应性差异

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Sexual reproduction is acknowledged to facilitate adaptation to novel environments while asexual eukaryotes are often regarded as having low adaptive potential. This view has been challenged in a number of studies, but the adaptive potential of asexual populations in the field is poorly documented. We investigated the response of natural populations of the parthenogenetic nematode Acrobeloides nanus to imposed divergent selective pressures. For this purpose, we employed a replicated evolution experiment in the field. After 20 years of evolution under abiotic stress and control conditions, life-history traits were assessed in reaction norm- and reciprocal transplant experiments. Both these experiments indicated adaptive divergence within the population of A. nanus. Namely, the transplant experiment demonstrated that in the stressed soil environment, body growth rate was more reduced in the nematodes originating from the control treatment. In the reaction norm experiment, survival and reproduction were higher under test conditions corresponding to the native environment of the nematodes. The differences in the analysed traits are discussed in the context of life-history theory. Overall, our results strongly support high adaptive potential of A. nanus and suggest that population structure and distribution of asexual species is shaped by local adaptation events.
机译：人们承认有性生殖有助于对新环境的适应，而无性真核生物通常被认为具有较低的适应潜力。这种观点在许多研究中都受到挑战，但是该领域无性种群的适应潜力却鲜有文献记载。我们调查了孤雌生殖线虫Acrobeloides nanus的自然种群对施加不同选择压力的反应。为此，我们在该领域进行了复制进化实验。在非生物胁迫和控制条件下经过20年的进化后，在反应规范和互惠移植实验中评估了生活史特征。这两个实验都表明七叶草种群内的适应性差异。即，移植实验表明，在受胁迫的土壤环境中，源于对照处理的线虫的身体生长速度进一步降低。在反应标准实验中，在与线虫天然环境相对应的测试条件下，存活和繁殖更高。在生活史理论的背景下讨论了所分析特征的差异。总体而言，我们的结果强烈支持七叶草的高适应潜力，并表明无性物种的种群结构和分布受局部适应事件的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号