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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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中国科学院东亚植... [154]
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昆明植物所硕博研究... [68]
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中国西南野生生物种... [10]
植物化学与西部植物资... [7]
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周浙昆 [53]
Sun Hang [47]
许建初 [40]
邓涛 [17]
李德铢 [15]
龚洵 [12]
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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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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
Diversity patterns of cushion plants on the Qinghai-Tibet Plateau: A basic study for future conservation efforts on alpine ecosystems
期刊论文
PLANT DIVERSITY, 2022, 卷号: 44, 期号: 3, 页码: 231-242
Authors:
Zhang, Ya-Zhou
;
Qian, Li-Shen
;
Chen, Xu-Fang
;
Sun, Lu
;
Sun, Hang
;
Chen, Jian-Guo
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Submit date：2022/07/15
Climatic features
Cushion distribution
Ecosystem engineer
Hengduan mountains
Phylogenetic diversity
Phylogenetic community structure
Review on factors affecting coffee volatiles: from seed to cup
期刊论文
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, 2022, 卷号: 102, 期号: 4, 页码: 1341-1352
Authors:
Wang,Xiaoyuan
;
Wang,Yanbing
;
Hu,Guilin
;
Hong,Defu
;
Guo,Tieying
;
Li,Jinhong
;
Li,Zhongrong
;
Qiu,Minghua
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Submit date：2022/04/02
aroma modification
controlled fermentation
superheated steam (SHS)
cold brew
coffee omics
STARTER CULTURES
AROMA COMPOUNDS
ROASTED COFFEE
ARABICA COFFEE
FERMENTATION
QUALITY
FLAVOR
BEANS
EXTRACTION
STORAGE
Gene duplications and phylogenomic conflict underlie major pulses of phenotypic evolution in gymnosperms
期刊论文
nature plants, 2021
Authors:
Gregory W. Stull
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Submit date：2021/08/23
Plastome phylogenomics of the East Asian endemic genus Dobinea
期刊论文
PLANT DIVERSITY, 2021, 卷号: 43, 期号: 1, 页码: 35-42
Authors:
Liu,Changkun
;
Yang,Jin
;
Jin,Lei
;
Wang,Shuying
;
Yang,Zhenyan
;
Ji,Yunheng
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Submit date：2022/04/02
Neo-endemism
Divergence
Dobinea delavayi
Dobinea vulgaris
Dobineeae
Anacardiaceae
QUANTITATIVE RECONSTRUCTION
MOLECULAR PHYLOGENETICS
EVOLUTIONARY HISTORY
CHLOROPLAST GENOME
SAPINDALES
MONSOON
NUCLEAR
CHINA
DIVERSIFICATION
ANACARDIACEAE
Spatiotemporal maintenance of flora in the Himalaya biodiversity hotspot: Current knowledge and future perspectives
期刊论文
ECOLOGY AND EVOLUTION, 2021, 卷号: 11, 期号: 16, 页码: 10794-10812
Authors:
Wambulwa,Moses C.
;
Milne,Richard
;
Wu,Zeng-Yuan
;
Spicer,Robert A.
;
Provan,Jim
;
Luo,Ya-Huang
;
Zhu,Guang-Fu
;
Wang,Wan-Ting
;
Wang,Hong
;
Gao,Lian-Ming
;
Li,De-Zhu
;
Liu,Jie
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Submit date：2022/04/02
biodiversity hotspot
climate change
elevational gradient
Himalayan flora
mountain ecosystem
spatiotemporal diversification
SPECIES RICHNESS PATTERNS
QINGHAI-TIBET PLATEAU
SOUTH ASIAN MONSOON
ELEVATIONAL GRADIENT
HENGDUAN MOUNTAINS
CLIMATE-CHANGE
BETA-DIVERSITY
QUATERNARY GLACIATION
GENETIC CONSEQUENCES
ARTIFICIAL DISPERSAL
Gene duplications and phylogenomic conflict underlie major pulses of phenotypic evolution in gymnosperms
期刊论文
NATURE PLANTS, 2021, 卷号: 7, 期号: 8, 页码: 1015+
Authors:
Stull,Gregory W.
;
Qu,Xiao-Jian
;
Parins-Fukuchi,Caroline
;
Yang,Ying-Ying
;
Yang,Jun-Bo
;
Yang,Zhi-Yun
;
Hu,Yi
;
Ma,Hong
;
Soltis,Pamela S.
;
Soltis,Douglas E.
;
Li,De-Zhu
;
Smith,Stephen A.
;
Yi,Ting-Shuang
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Submit date：2022/04/02
SEED PLANTS
R PACKAGE
POLYPLOIDY
CONIFERS
TREE
GENERATION
INFERENCE
ANCIENT
DISCORDANCE
ANGIOSPERMS
Pluteus cervinus and Laccaria moshuijun (Agaricales, Basidiomycota), New Records from Pakistan
期刊论文
CHIANG MAI JOURNAL OF SCIENCE, 2021, 卷号: 48, 期号: 3, 页码: 909-921
Authors:
Ishaq,Muhammad
;
Karunarathna,Samantha C.
;
Tibpromma,Saowaluck
;
Dauner,Lucas
;
Asad,Suhail
;
Khan,Muhammad Binyamin
;
Ullah,Shariat
;
Fiaz,Muhammad
;
Khalid,Abdul Nasir
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Submit date：2022/04/02
buner
Hydnangiaceae
ITS
phylogeny
Pluteaceae
taxonomy
BUNER
DISTRICT
AMANITA
Grade of Membership models reveal geographical and environmental correlates of floristic structure in a temperate biodiversity hotspot
期刊论文
NEW PHYTOLOGIST, 2021, 卷号: 232, 期号: 3, 页码: 1424-1435
Authors:
Li,Qin
;
Sun,Hang
;
Boufford,David E.
;
Bartholomew,Bruce
;
Fritsch,Peter W.
;
Chen,Jiahui
;
Deng,Tao
;
Ree,Richard H.
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Submit date：2022/04/02
biogeographical regionalization
biotic turnover
floristic structure
Hengduan Mountains
seed plants
species motif
tropical-temperate divide
HENGDUAN MOUNTAINS
BIOGEOGRAPHICAL REGIONS
TIBETAN PLATEAU
PLANT DIVERSITY
PATTERNS
WORLDS
DIVERSIFICATION
EVOLUTION
GRADIENT
CLIMATE
Diversity of Flower Visiting Beetles at Higher Elevations on the Yulong Snow Mountain (Yunnan, China)
期刊论文
DIVERSITY-BASEL, 2021, 卷号: 13, 期号: 11, 页码: 604
Authors:
Li,Kai-Qin
;
Ren,Zong-Xin
;
Li,Qiang
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Submit date：2022/04/02
alpine
diversity
Hengduan Mountain
modularity
plant-insect interaction
FLORAL BIOLOGY
RAIN-FOREST
POLLINATION
COLEOPTERA
COMMUNITY
SPECIALIZATION
NETWORKS
SARAWAK
ANDES
