中国圆孔牛肝菌属的分类及分子系统发育研究

	中国圆孔牛肝菌属的分类及分子系统发育研究; Taxonomy and molecular phylogeny of Gyroporus from China
	黄聪
导师	李艳春
摘要	Fungi of Gyroporus Quél. (Basidiomycetes, Boletales, Gyroporaceae) are not only of important ecological value, but also of economic and scientific values. Most species within the genus form ectomycohrrizal symbioses with various tree species, benefiting a wide range of forest trees. Some species are well-known edible or medicinal mushrooms. Fourty species have been reported worldwide, of which nine species have been reported from China. Species in this genus are diverse in morphology, complicate in structure, and wide in ecological distribution. Currently, there are following scientific problems in this genus: (1) the identification of species in this genus from China need to be verified, especially those referenced to the names of European or North American species, and need to be reconfirmed whether they are conspecific or not; (2) the knowledge about the diversity of the species in the genus in China is seriously scanty; and a large number of species need to be described; and (3) the relationships among species within this genus are largely unclear, due to the paucity of molecular phylogeny studies. Accordingly, based on large-scale sampling of ca. 120 representative samples of the genus, this study intends to employ integrated and inter-disciplinary approaches including morphological-anatomical characterization, ultrastructural investigations, molecular phylogenetic analyses of multigene nucleotide sequences (ITS, LSU, tef1-a, atp6 and rpb2), and field-ecological observations to study the phylogeny of Gyroporus, and we also elucidated the biogeography and hosts of Gyroporus. The main results are summarized as follows: (1) The monophyly of Gyroporus was well supported, and its infrageneric classification was proposed for the first time and two sections, they were erected based on molecular and morphological data, the new section namely G. sect Castaneus. A total of seventeen species of this genus were identified in China in this study, including twelve new species, 1 newly recorded species to China, and four previously reported species from China. Chinese species account for about 40% of the world's known species. The study has revealed the diversity and peculiarity of the Gyroporus in China. (2) We concluded that the main host species of this genus are Fagaceae (Quercus, Lithocarpus, Castanea) and Pinaceae (Abies, Pinus) in the Northern Hemisphere, but in the Southern Hemisphere species in Gyroporus are mainly associated with plants of the family Myrtaceae (Leptospermum, Eucalyptus). Molecular dating suggested that Gyroporus possibly was originated from East Asia in the late Eocene (36 Ma). We also briefly analysed possible ways for Gyroporus to dispersal globally.
	2021-05
文献类型	学位论文
条目标识符	http://ir.kib.ac.cn/handle/151853/74639
专题	昆明植物所硕博研究生毕业学位论文
推荐引用方式 GB/T 7714	黄聪. 中国圆孔牛肝菌属的分类及分子系统发育研究, Taxonomy and molecular phylogeny of Gyroporus from China[D],2021.

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