• 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>AoB Plants >Isotropic and anisotropic processes influence fine-scale spatial genetic structure of a keystone tropical plant
【2h】

Isotropic and anisotropic processes influence fine-scale spatial genetic structure of a keystone tropical plant

机译：各向同性和各向异性过程影响基石热带植物的精细尺度空间遗传结构

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

Limited seed or pollen dispersal enhances spatial genetic relatedness between individuals (fine-scale spatial genetic structure, FSGS), which usually decreases as a function of physical distance. However, such isotropic pattern of FSGS may not always occur when spatially asymmetric processes, for instance, wind direction during dispersal, are considered in wind-pollinated and -dispersed plants. This study assessed the pattern of FSGS in the keystone tropical wetland plant Cyperus papyrus (papyrus) as a function of these isotropic and anisotropic processes. We tested the hypothesis that the FSGS would be influenced by predominant wind direction during pollen and seed dispersal, as well as by the physical distance between individuals. We genotyped a total of 510 adults and 407 juveniles from three papyrus swamps (Ethiopia) using 15 microsatellite markers. In addition, the contemporary directional dispersal by wind was evaluated by seed release-recapture experiments and complemented with parentage analysis. Adults and juveniles differed in the strength of isotropic FSGS ranging from 0.09 to 0.13 and 0.12 to 0.16, respectively, and this suggests variation in dispersal distance. Anisotropic FSGS was found to be a function of asymmetric wind direction during dispersal/pollination that varied between sites. Historical gene dispersal distance was astoundingly low (<4 m), possibly due to localized seed rain. According to our contemporary dispersal estimates, mean pollen dispersal distances were longer than those of seed dispersal (101 and <55 m, respectively). More than two-thirds of seeds and half of pollen grains were locally dispersed (≤80 m). The difference in historical and contemporary dispersal distance probably resulted from the asymmetric wind direction due to change in vegetation cover in the surrounding matrix. We further concluded that, in addition to wind direction, post-dispersal processes could influence gene dispersal distance inferred from the FSGS.
机译：有限的种子或花粉扩散增强了个体之间的空间遗传相关性（精细尺度的空间遗传结构，FSGS），通常随着物理距离而降低。但是，当在风授粉和散布植物中考虑空间不对称过程（例如，散布期间的风向）时，FSGS的这种各向同性模式可能不会始终出现。这项研究评估了关键的热带湿地植物莎草纸莎草（纸莎草）中FSGS的模式与这些各向同性和各向异性过程的关系。我们测试了以下假设：FSGS将受花粉和种子传播过程中主要风向以及个体之间的物理距离影响。我们使用15个微卫星标记对来自三个纸莎草沼泽（埃塞俄比亚）的510名成年人和407名少年进行了基因分型。此外，通过种子释放-捕获实验对当代风的定向传播进行了评估，并辅以亲子关系分析。成人和青少年的各向同性FSGS的强度分别为0.09至0.13和0.12至0.16，这表明分散距离有所不同。各向异性FSGS被发现是散布/授粉期间风向不对称的函数，在不同站点之间变化。历史基因的扩散距离极低（<4 m），这可能是由于局部降雨造成的。根据我们当代的扩散估计，平均花粉扩散距离比种子扩散距离长（分别为101和<55 m）。超过三分之二的种子和一半的花粉颗粒局部分散（≤80m）。历史和当代散布距离的差异可能是由于周围基质中植被的变化导致风向不对称所致。我们进一步得出结论，除风向外，后扩散过程还可能影响从FSGS推断的基因扩散距离。

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