【摘要】 本文根据外部形态、叶表皮解剖、淀粉粒、传播机制和地理分布特征,分析了中国大麦属(包括引进种)种间演化关系,并结合地史探讨了大麦属的地理起源及扩展途径。通过五方面证据的相互印证,表明大麦属的双花组最原始,直刺颖组次之,禾谷组最为高级。双花组的内蒙古大麦可能衍生了该属其它各类群。中国内蒙古集居了大麦属的古老类群,最原始的特有种内蒙古大麦分布于该区锡盟宝格达山,其它衍生类群则依演化顺序在东西方向上由近及远排布。而且,内蒙古是块古陆,植物区系古老,具有大麦属繁衍和避难的地史条件。故推测中国内蒙古可能是大麦属的起源中心。更多还原

【Abstract】 Based on the characteristics of extenal morphology, anatomy of leaf epidermis, starch grain, dispersal mechanism and geographical distribution, the evolutional relation among species of the genus Horde um in China (including introduced species) has been analysed and combined with hte geological history , the geographical origin and the migratory pathways of the genus have been studied as well in the present paper.The mutual corroboration of the evidence from five aspects has shown that the sect. Biflora is the most primitive, the sect. Stenosta chys is seconary and the sect. Hordeum is the most advanced among the three sections. H. tnnermongoiicum Kuo et L. B. Cai of the sect.Biflora probably derives all the other taxa of the genus. The old taxa of the genus are inhabited together in Inner Mongolia of China. H .innermongoticum Kuo et L.B.Cai, the most primitive endemic species, is distributed in Baogedashan. Ximeng. Inner Mongolia.Other derived taxa are distributed from near to far along evolutionary order in the east and west directions,Furthermore, the Inner Mongolia is a historical land and has ancient flora.There were historical and geographical conditions for derivation and refuge of the genus. So we infer that Inner Mongolia of China may be the centre of origin of the geaus Hordeum.更多还原