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地球上有记载的植物约30万种(species),已被人类利用的约2,500种,其中1,500种属于栽培植物(包括农作物、栽培果树、栽培林木、蔬菜、药用植物等)。每一种栽培植物在种内又存在多种多样的亚种(subspecies)、变种(varietas)、类型(forma)和品种(culti-var)。了解栽培植物品种的演变形成过程,不论在生物的进化问题上,还是在农作物的引种、栽培和选育新品种的实际工作上,都具有重要的理论和实践意义。本文仅就栽培植物的起源和农作物品种资源的一些问题作一简介。栽培植物的起源 1.栽培
There are about 300,000 species of plants recorded on Earth and about 2,500 species already used by humans. Of these, 1,500 are cultivated plants (including crops, cultivated fruit trees, cultivated trees, vegetables, medicinal plants, etc.). There is a wide variety of subspecies, varietas, formations and culti-vars within each species of cultivated plants. It is of great theoretical and practical significance to understand the evolvement and formation process of cultivated plant species both in terms of biological evolution and in the practical work of introducing, cultivating and breeding new crops. This article only on the origin of cultivated plants and some varieties of crop resources for a brief introduction. The origin of cultivated plants 1. Cultivation