生物多样性 ›› 2000, Vol. 08 ›› Issue (1): 95-102.  DOI: 10.17520/biods.2000013

• 论文 • 上一篇    下一篇

阿尔卑斯山黄花茅(Anthoxanthum alpinum)沿海拔梯度的基因频率分布

赵桂仿,Francois Felber,Philippe Kuepfer   

  1. Botanical Institute , University of Neuchatel , Chantemerle 18 , CH - 2007 , Neuchatel , Switzerland.
  • 收稿日期:1998-08-27 修回日期:1999-08-27 出版日期:2000-02-20 发布日期:2000-02-20

Gene frequency distributions of Anthoxanthum alpinumalong the altitudinal gradients in Swiss Alps

ZHAO Gui-Fang,Francois Felber,Philippe Kuepfer   

  1. Botanical Institute , University of Neuchatel , Chantemerle 18 , CH - 2007 , Neuchatel , Switzerland.
  • Received:1998-08-27 Revised:1999-08-27 Online:2000-02-20 Published:2000-02-20

摘要:

在瑞士阿尔卑斯山的2个定点样地,黄花茅从森林线(海拔1700 m)到山顶(海拔2830 m)呈连续分布。在海拔梯度样带的最高和最低定样场所间的垂直距离差不多为1000 m,但2个定样场所间相距仅仅1.4 km。在所研究的3个海拔梯度样带中,3个同工酶位点(Px-1, Got-2和 Mdh-1)被观察到有统计意义的倾群变异。研究结果显示:沿海拔梯度样带的亚居群间的基因流可能太弱不足以克服自然选择的影响,后者促使对局部环境的适应。在这种情况下,温度因子至少可能作为一种主要的自然选择力起作用。

AbstractAnthoxanthum alpinum has a continuous distribution from the treeline (1700 m) to the summit ridges (2830 m) in Arpette and Belalp of Valais , Swiss Alps. The highest and lowest sites of the transect differ by almost 1000 m in elevation , but only an average of 1. 4 km apart . A significant clinal variation was observed at three allozyme loci ( Px- 1 , Got- 2 and Mdh- 1) on all three transects. It suggests that gene flow among sub-populations may be too weak to overcome the effects of natural selection in favor of adaptations to local conditions , and that temperature variables may function as major selective force in this case.