摘要
在回顾白刺属研究历史的基础上 ,根据白刺属种间染色体倍数特征并结合形态学、生物地理学等方面的研究文献 ,提出新的白刺属种间分类系统 :二倍体组 ( 2n =2X =2 4 )和四倍体组 ( 2n =4X =48)。多倍化 ( 2X→ 4X)是白刺属内种间进化的基本特征。白刺属的起源中心可能是古地中海沿岸地区 ;中亚及我国西北地区是白刺属的现代分布中心。
Nitraria L. is a widespread genus of some 13 species from Africa, Asia, Europe and Australia. Taxonomic relationships of the genus have been subject to a wide diversity of opinion. Based on the number of chromosome, and combined with morphological and geobiological data of 13 species in genus Nitraria L., they were divided into two groups: diploid group (2n=2X=24) and tetraploid group (2n=4X=48). Polyploidy (2X→4X) is a basic evolutionary trend in the diversification of plants in genus Nitraria L.. A possible original site of the genus Nitraria L. was the coast of ancient Mediterranean. The central Asian and the northwestern China are its modern center of distribution. A applied perspective for molecular ecology research on these desert plant species was also suggested.
出处
《植物学通报》
CSCD
北大核心
2003年第5期632-638,共7页
Chinese Bulletin of Botany
基金
国家自然科学基金 (90 1 0 2 0 1 5
3 0 1 70 1 61 )
国家重点基础研究专项经费 (G1 9990 1 1 70 5 )项目
关键词
白刺属
分类
进化
多倍化
染色体数目
蒺藜科
Nitraria , Classification, Evolution, Polyploidy, Chromosome number
