摘要
交配系统是控制遗传物质在世代间传递的直接方式,影响着植物种群内和种群间遗传变异分布,决定着后代种群的遗传结构和遗传多样性。交配系统除了体现植物本身的生物学特性之外,还因环境条件的改变而发生改变和进化。海拔对环境因子在垂直方向上分布的影响呈现出一定的规律性,因而影响着植物的交配系统。对交配系统的进化模式研究发现,随着海拔的升高交配系统有从异交向自交演变的倾向,甚至在极端环境下植物的进化产生多倍体以适应恶劣的环境条件。本研究根据大量已有的研究成果,从海拔影响植物交配系统的传粉者数量、区系、传粉方式、植物生活史、花朵构件等方面进行了总结和概述。
The mating system is associated with genetic relationships,and genetic variation within population.To a large extent,the mating system effects on population quantity and genetic composition for natural selection.Besides the biological characters of plant itself,the mating system is evolved with the changeable environment.Altitude is one of the vertically regular environmental factors,which effects on mating system of alpine plant.The evolutionary model of mating system reveals that the trend of mating system changes from outcross to selfing along with increasing altitude.In extreme environments,alpine plant always experiences polyploidization to adapt the harsh environments.This study reviewed the regular influences of altitude on the plant mating system for the following aspects,including the number and species of pollinator,model of pollination and life history of plant,flower component and so on.
出处
《草业科学》
CAS
CSCD
北大核心
2012年第4期640-645,共6页
Pratacultural Science
基金
国家自然科学基金(30871531和30901051)
关键词
植物交配系统
传粉
海拔
进化
适应
plant mating system
pollination
altitude
evolution
adaptation
