关键词: 片断热带雨林, 植物区系成分, 西双版纳

Abstract

As one of the biggest potato producing countries, China has the largest potato growing areas in the world. In some arid areas or mountainous districts, this crop is regarded as the staple food, while in other regions, it is a major daily vegetable. Due to the infection of virus, bacteria, fungi, etc. and the influence of environmental conditions, the per unit area yield of potato in China is lower than that of the world average. Furthermore, many marketable quality traits of domestic commercial cultivars are not satisfactory. Owing to the development of current methods in plant biotechnology and ease of Agrobacterium tumefaciens mediated transformation and regeneration of potato tissues, some Chinese plant biotehnology laboratories have Carried out or joined in some projects for the improvement of potato plants and have made progress in this area.

Key words: rain forest fragments, floristic composition, southern Yunnan