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中国科学院昆明植物研究所知识管理系统
Knowledge Management System of Kunming Institute of Botany,CAS
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GST,p < 0.001) and low levels of seed-based gene flow. C. debaoensis (Cycadaceae) is an endangered species restricted to the border of Guangxi and Yunnan province in southwest China. This species has been classified into two types: sand and karst, according to the soil matrix they grow on. We examined chloroplast sequence variation of the cpDNA sequences from 11 populations of this species. Significant population genetic differentiation was detected (GST= 0.684 and FST = 0.74160). There was marked genetic differentiation between populations in the sand and karst regions and no expansion was detected. Climate changes during glacial periods have had significant effects on the current distribution of cycads. The molecular phylogenetic data, together with the geographic distribution of the haplotypes, suggest that C. debaoensis experienced range contraction during glacial periods, and that the current populations are still confined to the original refugia in southwest China which have favorable habitats in glacial period. These results imply that small refugia were maintained in both sand and karst regions during the LGM (last glacial maximum). This species had no postglacial recolonization and only stayed in these refugia up to now. The low within-population diversity of C. debaoensis suggests that there were strong bottleneck events or founder effects within each separate region during the Quaternary climatic oscillations. Relatively high genetic and haplotype diversities were detected in the newly discovered populations, which located at intermediate locality of sand regions and had morphological variation; this is probably the consequence of the admixture of different haplotypes colonizing the area from separate sources. C. micholitzii occurs in the Annan Highlands in central Vietnam near the Laos border. C. bifida occurs in North Vietnam; its distribution extends across the border into adjacent localities in Guangxi and Yunnan in China. For the comparability between them,theywere considered as the same species C. micholitzii by many academicians. The cpDNA sequences from 11 populations showed that these very controversial species, C. micholitzii and C. bifida, is paraphyletic and should belong to the same species C. micholitzii. AMOVA analysis showed that the component of among-population within region/species (76.46%) was unexpectedly larger than the among-species/region component (14.97%), which also indicates that there is no justification for recognizing two species as C. micholitzii and C. bifida. This hypothesis was also supported by the geological data, especially the neotectonic history of the indo-china block, which started to move south since Oligocene and cause the geographic isolation of these two groups. Therefore, the most likely explanation to the phenotypic similarities between these two groups may be the retention of ancestral polymorphisms in the paraphyletic group due to incomplete lineage sorting. Furthermore, the similarities may also be ascribed to pollen-mediated gene flow among geographically proximate populations and/or phenotypic convergence under similar selection schemes in the same region. C.micholitzi had the higest genetic diversity (HT = 0.980,) and genetic differentiation (GST = 0.830, NST = 0.915) among the C. micholitzii complex. The high genetic diversity might be attributed to its long evolutionary history, highly diverse habitats. The ineffective mode of seed dispersal and dramatic neotectonic movement in the distribution range of this species could result in the high genetic differentiation. 2. Phylogeographic analysis based on nuclear ribosomal sequences, We sequenced the nrDNA ITS in all 27 populations sampled, 7 haplotypes were identified, among which C. micholitzii had 6, while C. multipinnata, C. longipetiolula and C. debaoensis shared the remaining one. Compared to chloroplast genes, nuclear genes had higher correlation between genetic and geographical distance, but lower interspecies differentiation (54.42% vs 25.24%). Phylogeographical structure of C. micholitzii and C.bifida based on ITS Variation was consistent with the morphology differentiation. This similar in nuclear gene should be ascribed to pollen-mediated gene flow among geographically proximate populations.Long-distance gene flow over the two groups was clearly interrupted, which brought on the nrDNA genetic differenciation between the geographically isolated groups, to a certain extent affected the morphological variation. 3. Interspecies relationships among Cycas micholitzii complex, We analysed chloroplast sequence variation of the atpB-rbcL and psbA-trnH intergenic spacers in 27 populations sampled of C. micholitzii complex, AMOVA analysis showed that the component of among-species/region component (59.21%). However, phylogenic analysis showed that the haplotypes of C. micholitzii complex couldn`t grouped into four clusters closely corresponding to the narrowly defined C. micholitzi, C. multipinnata, C. debaoensis and C. longipetiolula. We concluded that the conflict may result from several factors: firstly incomplete lineage sorting of C. micholitzii; secondly hybridization/introgression of sympatrically cycads, which would be supported by evidence base on nrDNA ITS sequences; thirdly intramolecular recombination in cpDNA of cycads; eventually the neotectonic movement in the distribution range of this 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Evolutionary ecology of plant-plant interactions
期刊论文
出版物, 3111, 页码: 1-144
作者:
Zuo Z(作者)
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浏览/下载：229/4
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提交时间：2017/07/19
Clarifying the identity of marketed edible Huotanjun (Burnt Charcoal Mushroom) in southern China
期刊论文
MYCOLOGICAL PROGRESS, 2023, 卷号: 22, 期号: 12, 页码: 80
作者:
Huang,Lian-Hui
;
Wang,Jing
;
Li,Shu-Hong
;
Qin,Wei-Qiang
;
Li,Hai-Jiao
;
Wang,Xiang-Hua
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浏览/下载：6/3
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提交时间：2024/05/09
Edible mushrooms
Molecular phylogeny
4 new species
Russula
Russula subgen. Compactae
POISONING OUTBREAKS
PHYLOGENETIC-RELATIONSHIPS
SPECIES CONCEPTS
RUSSULA PERS.
LACTIFLUUS
FUNGI
COMMUNITIES
THAILAND
Two new species of Sarcomyxa (Agaricales) from China
期刊论文
MYCOLOGICAL PROGRESS, 2023, 卷号: 22, 期号: 6, 页码: 38
作者:
Cai,Qing
;
Lin,Wen-Fei
;
Liu,Jian-Wei
;
Zhou,Yong
;
Yang,Zhu L.
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浏览/下载：3/1
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提交时间：2024/05/09
Sarcomyxaceae
Morphology
New taxa
Phylogeny
Systematics
PHYLOGENETIC INFERENCE
ALIGNMENTS
SEQUENCES
MUSHROOMS
CLADES
TOOL
Pleomorphic Dematiomelanomma yunnanense gen. et sp. nov. (Ascomycota, Melanommataceae) from grassland vegetation in Yunnan, China
期刊论文
MYCOKEYS, 2023, 期号: 98, 页码: 273-297
作者:
Gao,Ying
;
Zhong,Tingfang
;
Bhat,Jayarama D.
;
de Farias,Antonio Roberto Gomes
;
Dawoud,Turki M.
;
Hyde,Kevin D.
;
Xiong,Weiqiang
;
Li,Yunju
;
Gui,Heng
;
Yang,Xuefei
;
Wu,Shixi
;
Wanasinghe,Dhanushka N.
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浏览/下载：8/3
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提交时间：2024/05/09
Asexual morph
Greater Mekong Subregion
molecular phylogeny
muriform
Pleosporales
sexual morph
taxonomy
MULTIPLE SEQUENCE ALIGNMENT
MICROCYCLE CONIDIATION
FUNGI
NAMES
TAXA
PLEOSPORALES
REVISION
PETRAKIA
RECORDS
CHOICE
Species Diversity of Amanita Section Vaginatae in Eastern China, with a Description of Four New Species
期刊论文
JOURNAL OF FUNGI, 2023, 卷号: 9, 期号: 8, 页码: 862
作者:
Cui,Yang-Yang
;
Hao,Yan-Jia
;
Guo,Ting
;
Yang,Zhu L.
;
Cai,Qing
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浏览/下载：2/0
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提交时间：2024/05/09
Agaricales
ectomycorrhizal fungi
Funga
morphology
integrative taxonomy
INTEGRATIVE TAXONOMY
MOLECULAR PHYLOGENY
AGARICALES
BASIDIOMYCOTA
SELECTION
Taxonomy and Phylogeny of Cystolepiota (Agaricaceae, Agaricales): New Species, New Combinations and Notes on the C. seminuda Complex
期刊论文
JOURNAL OF FUNGI, 2023, 卷号: 9, 期号: 5, 页码: 537
作者:
Qu,Hua
;
Damm,Ulrike
;
Hou,Ya-Jun
;
Ge,Zai-Wei
Adobe PDF(110107Kb)
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浏览/下载：4/0
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提交时间：2024/05/09
molecular phylogeny
new combinations
new species
species delimitation
systematics
LEPIOTA
AGARICACEAE
CALIFORNIA
SEQUENCES
INFERENCE
FUNGI
TOOL
Plant-Associated Novel Didymellaceous Taxa in the South China Botanical Garden (Guangzhou, China)
期刊论文
JOURNAL OF FUNGI, 2023, 卷号: 9, 期号: 2, 页码: 182
作者:
Kularathnage,Nuwan D. D.
;
Senanayake,Indunil C. C.
;
Wanasinghe,Dhanushka N. N.
;
Doilom,Mingkwan
;
Stephenson,Steven L. L.
;
Song,Jiage
;
Dong,Wei
;
Xu,Biao
Adobe PDF(7037Kb)
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浏览/下载：10/1
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提交时间：2024/05/09
3 new species
1 new host record
Dothideomycetes
Guangdong Province
hyaline-spored coelomycetes
Pleosporales
INCERTAE-SEDIS
LEAF-SPOT
SP. NOV.
PHOMA
FUNGI
PHYLOGENY
LETTUCE
TROPICA
CHOICE
GENERA
Species diversity of Hygrophorus in China and a phylogenetic study of the genus
期刊论文
MYCOSPHERE, 2023, 卷号: 14, 期号: 1, 页码: 1742-1834
作者:
Wang,C. Q.
;
Zhang,M.
;
He,X. L.
;
Liu,J. W.
;
Wei,T. Z.
;
Liu,T. Z.
;
Wang,K.
;
Adamcik,S.
;
Li,T. H.
;
Deng,W. Q.
Adobe PDF(6619Kb)
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浏览/下载：55/3
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提交时间：2024/05/09
Hygrophoraceae
Novel taxa
Phylogeny
Taxonomy
Waxcap
EDIBLE MUSHROOM
RUSSULA-COMPLEX
SEQUENCE DATA
SP. NOV.
AGARICALES
OLIVACEOUMBRINI
CLADES
拟疣柄牛肝菌属（Hemileccinum）分子系统发育与分类研究
学位论文
: 中国科学院大学, 2022
作者:
李梅香
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浏览/下载：3/0
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提交时间：2024/05/14
拟疣柄牛肝菌属，形态分类，分子系统发育，物种多样性
Hemileccinum, Morphological classification, Molecular phylogeny, Species diversity
A global phylogeny of Lycopodiaceae (Lycopodiales; lycophytes) with the description of a new genus, Brownseya, from Oceania
期刊论文
TAXON, 2022, 卷号: 71, 期号: 1, 页码: 25-51
作者:
Chen,De-Kui
;
Zhou,Xin-Mao
;
Rothfels,Carl J.
;
Shepherd,Lara D.
;
Knapp,Ralf
;
Zhang,Liang
;
Lu,Ngan Thi
;
Fan,Xue-Ping
;
Wan,Xia
;
Gao,Xin-Fen
;
He,Hai
;
Zhang,Li-Bing
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浏览/下载：155/8
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提交时间：2022/04/02
Huperzia
Lycophyte Phylogeny
Lycopodiella Serpentina
Phlegmariurus
Phylloglossum
Vascular Plant Evolution
Complete Chloroplast Genome
Lycopodiopsida Lycopodiaceae
Generic Classification
Spore Morphology
Early Evolution
Land Plants
Rbcl Gene
Huperzia
Sequence
Likelihood
