海南分布有多种天然的热带松科植物如南亚松、海南五针松、华南五针松，并大面积栽培有原产于中美洲的加勒比松，其中的南亚松纯林是我国面积最大的热带针叶林。热带松林中具有丰富的外生菌根真菌，其中与松科植物形成专一共生关系的乳牛肝菌亚目真菌更是种类多样。但过去对海南热带松林该类真菌的研究处于近空白的状态，有待对其进行深入研究。本项目将在野外考察、标本采集的基础上，采用多基因系谱一致性系统发育种识别法，同时综合形态解剖特征、地理及生态信息等多方面的资料，对该地的乳牛肝亚目真菌进行分类研究，明确海南热带松林中的乳牛肝菌亚目真菌种类，探讨该类真菌与松科不同属种间的生态关系，发现和描述更多的新分类单元。项目的完成，对认识真菌物种分化，完善牛肝菌目分类系统具有重要的科学意义，同时也为松科植物的造林、热带松林生态系统的保护和恢复、以及热带真菌资源的可持续利用提供科学依据。

Hainan, an important tropical region, preserves the largest tropical coniferous forest composed of Pinus latteri in China; in addition, other native or introduced coniferous trees such as P. fenzeliana, P. kwangtungensis and P. caribaea are common in the region. These tropical coniferous trees host abundant ectomycorrhizal fungi, especially the species of Suillineae (Boletales), which have been known to be restricted to only pine species. However, the species of Suillineae in Hainan are poorly known. In the project, the species of Suillineae will be studied through fieldwork, multilocus DNA sequence data and phylogenetic species recognition based on genealogical concordance and nondiscordance (GCPSR), and morphological studies, aiming to reveal the species diversity of Suillineae in the tropical pine forests of Hainan, to investigate the ecological features of Suillineae, to describe more new taxa. With the project, it not only helps to understand the speciation of fungi, to improve the systematics of Boletales with collections of Suillineae from Hainan, but also provides important data for the cultivation of pine trees, protection and restoration of tropical pine ecosystem, and the conservation and sustainable use of the tropical fungal resources in China.