亚洲大陆杜茎山属（报春花科）的分类学研究

杜茎山属（报春花科）广泛分布于旧世界热带和亚热带地区，中国和邻近的东南亚地区是本属的现代多样性中心。对杜茎山属的分类学研究迄今都比较零散，分类学尚存在诸多问题，如有一部分种类地理分布广，性状变异幅度大，物种界限难以划分；因为缺乏资料，中国与邻近东南亚、印缅地区的一些物种一直没有厘清；对重要形态学性状的分类学价值缺乏正确把握，对属下分类系统的设置和分类群之间的亲缘关系缺乏一致的意见。本项目拟针对亚洲大陆的杜茎山属植物开展分类学研究。项目将全面查阅世界范围的馆藏本属植物标本，进行深入的野外调查；开展包括分子生物学的多学科的研究，以获得丰富的分类学性状，来重建本属的系统发育树；在此基础上追溯关键形态学性状的演化途径，探讨属下分类群的亲缘关系，并订正属下亚洲大陆各分类学实体。项目的实施对研究报春花科的系统学、探讨东亚植物区系、泛热带植物区系的起源与演变、以及二者之间的关系都有重要意义。

The genus Maesa (Primulaceae) is widely distributed in the tropical and subtropical regions of the Old World. China and the adjacent SE Asia is the modern biodiversity center of this genus. To date only sparse taxonomic studies have been available for this plant group. Several problems remain concerning the taxonomy of Maesa. Some species have wide distribution and great morphological variation, which resulted in uncertain specific delimitation; sufficient taxonomic data are needed, particularly for those species occurring in the border areas of China and adjacent SE Asia and the Indian-Myanmar regions; evolutionary trends of some inportant morphological characters are not fully understood, infrageneric grouping and phylogenetic relationships are also unclear. This project is to study the taxonomy of Maesa in the Asian continent. Methods will include literature searching, detailed herbarium examination, and extensive filed investiations. By incorporating multi-disciplinary data inculding molecular biolgoy, sufficient taxonomic evidence will be achieved, to reconstruct the phylogeny of Maesa, which will provide a framework for tracing character evolution, inferring genetic relationships, and revising infrageneric entities in Asian continent. The successful implement of the study will be important for the systematics of Primulaceae, for understanding the evolution of East Asian and Pantropical flora, and the relationship between them two.