多倍化——白刺属的系统分类、进化特征及应用前景  

Polyploidy: Classification, Evolution and Applied Perspective of the Genus Nitraria L.

作　　者：潘晓云[1,2] 魏小平[2] 尉秋实[3] 陈家宽[1] 王根轩[2] 

机构地区：[1]生物多样性与生态工程教育部重点实验室,复旦大学生物多样性科学研究所,上海200433 [2]兰州大学干旱农业生态国家重点实验室,兰州730000 [3]甘肃省治沙研究所民勤沙生植物园,武威733300

出　　处：《植物学通报》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

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.

关 键 词：白刺属 分类 进化 多倍化 染色体数目 蒺藜科 

分 类 号：Q941[生物学—植物学]