Lactarius deliciosus is an ectomycorrhizal mushroom that forms symbiotic associations with species of Pinus and plays an important ecological role in natural forest ecosystems in many parts of the world.It is also an economically important gourmet mushroom.Because no artificial cultivation is available,natural populations of this species are under increasing threats,primarily from habitat disturbance and destruction.We analyzed 68 samples of L.deliciosus from South China using ITS sequences.By comparing the difference of ITS sequences,the haplo...