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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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许建初 [56]
Sun Hang [44]
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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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Boletes clarified
期刊论文
出版物, 3111, 期号: 0, 页码: 1-38
Authors:
David Arora
;
Jonathan L. Frank
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Submit date：2017/07/24
Appendiculati
Boletaceae
Butter Boletes
Butyriboletus
Molecular phylogenetics
New Genus
New Species
Taxonomy
Evolutionary ecology of plant-plant interactions
期刊论文
出版物, 3111, 页码: 1-144
Authors:
Zuo Z(作者)
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How to Prepare a Manuscript for International Journal
期刊论文
出版物, 3111, 页码: 1-46
Authors:
Zuo Z(作者)
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Data Analysisin Vegetation Ecology
期刊论文
出版物, 3111, 期号: 0, 页码: 1-297
Authors:
Otto Wildi
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Submit date：2017/07/24
High species richness in the lichen genus Peltigera (Ascomycota, Lecanoromycetes): 34 species in the dolichorhizoid and scabrosoid clades of section Polydactylon, including 24 new to science
期刊论文
PERSOONIA, 2023, 卷号: 51, 页码: 1-88
Authors:
Magain,N.
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Miadlikowska,J.
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Goffinet,B.
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Goward,T.
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Pardo-De la Hoz,C. J.
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Juriado,I.
;
Simon,A.
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Mercado-Diaz,J. A.
;
Barlow,T.
;
Moncada,B.
;
Luecking,R.
;
Spielmann,A.
;
Canez,L.
;
Wang,L. S.
;
Nelson,P.
;
Wheeler,T.
;
Lutzoni,F.
;
Serusiaux,E.
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Submit date：2024/07/17
cryptic species
identification key
new taxa
Peltigerales species delimitation
INTERNAL TRANSCRIBED SPACER
BRITISH-COLUMBIA
PHYLOGENETIC REVISION
FORMING ASCOMYCOTA
NITROGEN-FIXATION
LARGE SUBUNIT
RECENT ORIGIN
DELIMITATION
FUNGI
DIVERSITY
The diversity of mycorrhiza-associated fungi and trees shapes subtropical mountain forest ecosystem functioning
期刊论文
JOURNAL OF BIOGEOGRAPHY, 2023
Authors:
Luo,Ya-Huang
;
Ma,Liang-Liang
;
Seibold,Sebastian
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Cadotte,Marc W. W.
;
Burgess,Kevin S. S.
;
Tan,Shao-Lin
;
Ye,Lin-Jiang
;
Zheng,Wei
;
Zou,Jia-Yun
;
Chen,Zhi-Fa
;
Liu,De-Tuan
;
Zhu,Guang-Fu
;
Shi,Xiao-Chun
;
Zhao,Wei
;
Li,De-Zhu
;
Liu,Jie
;
Gao,Lian-Ming
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Submit date：2024/07/10
above-ground carbon
arbuscular mycorrhiza
ectomycorrhiza
elevational gradients
functional diversity
soil organic carbon
NET PRIMARY PRODUCTIVITY
CARBON SEQUESTRATION
ABOVEGROUND BIOMASS
TROPICAL FORESTS
NITROGEN LIMITATION
BIODIVERSITY LOSS
SPECIES RICHNESS
PLANT DIVERSITY
ORGANIC-MATTER
SOIL
Phylogeny and phenotypic adjustments drive functional traits in Rhododendron across elevations in its diversity hot-spot in W-China
期刊论文
ALPINE BOTANY, 2023
Authors:
Liu,Jin-Mei
;
de Vos,Jurriaan M.
;
Korner,Christian
;
Yang,Yang
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Adaptation
Atmospheric pressure
Elevation
Evolution
Mountains
Temperature
Woody species
CARBON-ISOTOPE DISCRIMINATION
FLORAL TRAITS
PLANT-GROWTH
LEAF
ERICACEAE
DETERMINANTS
MORPHOLOGY
DIVERSIFICATION
CONDUCTANCE
MOUNTAINS
Taxonomy, phylogeny and evolution of freshwater Hypocreomycetidae (Sordariomycetes)
期刊论文
FUNGAL DIVERSITY, 2023, 卷号: 121, 期号: 1, 页码: 1-94
Authors:
Bao,Dan-Feng
;
Hyde,Kevin D.
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Maharachchikumbura,Sajeewa S. N.
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Perera,Rekhani H.
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Thiyagaraja,Vinodhini
;
Hongsanan,Sinang
;
Wanasinghe,Dhanushka N.
;
Shen,Hong-Wei
;
Tian,Xing-Guo
;
Yang,Li-Quan
;
Nalumpang,Sarunya
;
Luo,Zong-Long
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Ancestral character analysis
Divergence time estimates
Molecular clock analysis
Morphology
Phylogeny
Freshwater fungi
MULTIPLE SEQUENCE ALIGNMENT
SP-NOV
CLONOSTACHYS-ROSEA
STACHYBOTRYS-CHARTARUM
SUBMERGED WOOD
SP. NOV.
THELONECTRIA NECTRIACEAE
NATURAL CLASSIFICATION
MOLECULAR PHYLOGENY
FUNGAL ASSOCIATIONS
Stable functional structure despite high taxonomic variability across fungal communities in soils of old-growth montane forests
期刊论文
MICROBIOME, 2023, 卷号: 11, 期号: 1, 页码: 217
Authors:
Zeng,Qingchao
;
Lebreton,Annie
;
Auer,Lucas
;
Man,Xiaowu
;
Jia,Liukun
;
Wang,Gengshen
;
Gong,Sai
;
Lombard,Vincent
;
Buee,Marc
;
Wu,Gang
;
Dai,Yucheng
;
Yang,Zhuliang
;
Martin,Francis M.
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Fungal guilds
Functional traits
Forest soil
Metatranscriptomics
Organic Matter degradation
Yunnan
DATABASE
SPRUCE
Updates on Scleroderma: Four New Species of Section Scleroderma from Southwestern China
期刊论文
DIVERSITY-BASEL, 2023, 卷号: 15, 期号: 6, 页码: 775
Authors:
Wu,Rui
;
Zhou,Lvrong
;
Qu,Hua
;
Ge,Zai-Wei
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Submit date：2024/05/09
four new species
Boletales
ectomycorrhizal fungi
Sclerodermataceae
taxonomy
HOST-SPECIFICITY
SP. NOV.
ECTOMYCORRHIZAL
DIVERSITY
FUNGI
ASSOCIATIONS
SUTHEPENSE
