武陵山区植物区系细胞地理学研究

武陵山区位于湘鄂渝黔四省市界处，是我国亚热带森林系统核心区和长江流域重要的生态屏障，具有物种丰富和起源古老的特点，享有“华中动植物基因库”的美誉，是开展生物多样性基础研究非常关键的地区。武陵山区极高的物种丰富性和特有性必然有其细胞学遗传机制，然而对该地区植物区系细胞学方面的研究还非常少。本项目首先利用计算机收集整理已有的细胞学文献建立武陵山区植物染色体数据库，为进一步的细胞地理学研究搭建一个基础平台。另一方面鉴于该地区细胞学资料贫乏，我们将大量增加对该地区的植物细胞学的研究和报道，同时选取一些该地区的重要类群开展细胞学与染色体进化规律的研究。最后综合所有数据统计分析武陵山区植物多倍体的比率并探讨其在本地区植物区系演化中的地位和作用。通过对武陵山区植物区系的细胞学方面的初步研究，为探讨该地区植物物种进化、华中植物区系起源和演化等许多重大问题提供独到的研究视角和重要的启示意义。

Wuling Mountains is located on the boundaries among Hunan, Hubei, Guizhou, and Chongqing. It is a core area of sub-tropical forestry ecosystem in China and a key ecological barrier in Yangtze River Basin, characterized by high species richness and ancient origin and well-known as “gene bank of plants and animals in central China”. Therefore, the Wuling Mountains is an important area to study origin and evolution of biodiversity. There should be cytological mechanism for the high species richness and endemism. However, the chromosome survey from this region is still very poor. This project first aims to collect the previously reported chromosome data using a database technology, in order to provide a good background for further studies. Then, a large number of taxa will be explored to accumulate cytological data from this area and some selected important taxa will be cytologically studied. Finally, synthesized with all chromosomal data available to assess the role of polyploidy in the chromosome evolution of plants in this region. This is important to our understanding of plant speciation, floristic origin and evolution in Wuling Mountains, as well as in flora of central China.