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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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二倍体草莓基因组图谱构建与S位点演化研究
学位论文
: 中国科学院大学, 2022
作者:
陈武
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浏览/下载：69/0
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提交时间：2024/05/14
草莓属，基因组，自交不亲和，核糖核酸酶T2，S位点
Fragaria, Genome, Self-incompatible, RNase T2, S-locus
Complex and reticulate origin of edible roses (Rosa, Rosaceae) in China
期刊论文
HORTICULTURE RESEARCH, 2022, 卷号: 9, 页码: uhab051
作者:
Cui, Wei-Hua
;
Du, Xin-Yu
;
Zhong, Mi-Cai
;
Fang, Wei
;
Suo, Zhi-Quan
;
Wang, Dan
;
Dong, Xue
;
Jiang, Xiao-Dong
;
Hu, Jin-Yong
Adobe PDF(751Kb)
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浏览/下载：35/8
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提交时间：2024/04/30
NUCLEAR-DNA CONTENT
COMPLETE CHLOROPLAST GENOME
DENSITY GENETIC-MAP
GENUS ROSA
PHYLOGENETIC-RELATIONSHIPS
MOLECULAR EVIDENCE
RIBOSOMAL DNA
GARDEN ROSES
WILD ROSES
EVOLUTION
中国食用玫瑰的复杂网状起源
学位论文
, 2021
作者:
崔卫华
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浏览/下载：183/0
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提交时间：2024/03/20
An updated tribal classification of Lamiaceae based on plastome phylogenomics
期刊论文
BMC BIOLOGY, 2021, 卷号: 19, 期号: 1, 页码: 2
作者:
Zhao,Fei
;
Chen,Ya-Ping
;
Salmaki,Yasaman
;
Drew,Bryan T.
;
Wilson,Trevor C.
;
Scheen,Anne-Cathrine
;
Celep,Ferhat
;
Braeuchler,Christian
;
Bendiksby,Mika
;
Wang,Qiang
;
Min,Dao-Zhang
;
Peng,Hua
;
Olmstead,Richard G.
;
Li,Bo
;
Xiang,Chun-Lei
Adobe PDF(2557Kb)
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浏览/下载：166/43
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提交时间：2022/04/02
Lamiaceae
Lamioideae
Mints
Phylogenomics
Tribal relationships
COMPLETE CHLOROPLAST GENOME
HAWAIIAN ENDEMIC MINTS
MOLECULAR PHYLOGENY
POLLEN MORPHOLOGY
CLERODENDRUM LAMIACEAE
LAMIOIDEAE LAMIACEAE
STACHYDEAE LAMIACEAE
CHARACTER EVOLUTION
STAMINAL EVOLUTION
PERICARP STRUCTURE
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
作者:
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
Adobe PDF(2089Kb)
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浏览/下载：201/63
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提交时间：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
The untapped potential of plant sesterterpenoids: chemistry, biological activities and biosynthesis
期刊论文
NATURAL PRODUCT REPORTS, 2021, 卷号: 38, 期号: 12, 页码: 2293-2314
作者:
Guo,Kai
;
Liu,Yan
;
Li,Sheng-Hong
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浏览/下载：97/26
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提交时间：2022/04/02
LEUCOSCEPTRUM-CANUM
GLANDULAR TRICHOMES
FERN CONSTITUENTS
AERIAL PARTS
ABSOLUTE STEREOCHEMISTRY
SALVIA
CYCLIZATION
SYNTHASES
NORSESTERTERPENES
CONFIGURATION
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
作者:
Li,Kai-Qin
;
Ren,Zong-Xin
;
Li,Qiang
Adobe PDF(2409Kb)
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浏览/下载：135/49
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提交时间：2022/04/02
alpine
diversity
Hengduan Mountain
modularity
plant-insect interaction
FLORAL BIOLOGY
RAIN-FOREST
POLLINATION
COLEOPTERA
COMMUNITY
SPECIALIZATION
NETWORKS
SARAWAK
ANDES
Polyploidization and sexual dimorphism of floral traits in a subdioecious population of Dasiphora glabra
期刊论文
JOURNAL OF PLANT ECOLOGY, 2021, 卷号: 14, 期号: 2, 页码: 229-240
作者:
Wang,Lin-Lin
;
Yang,Na-Cai
;
Chen,Min-Yu
;
Yang,Yong-Ping
;
Duan,Yuan-Wen
Adobe PDF(671Kb)
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提交时间：2022/04/02
natural selection
flower traits
polyploidy
sex separation
sexual dimorphism
GENDER DIMORPHISM
POLLEN LIMITATION
POLLINATOR VISITATION
PLANT REPRODUCTION
ALPINE PLANT
EVOLUTIONARY
STRATEGIES
DISPLAY
SYSTEM
FRUIT
Climatic Refugia and Geographical Isolation Contribute to the Speciation and Genetic Divergence in Himalayan-Hengduan Tree Peonies (Paeonia delavayi and Paeonia ludlowii)
期刊论文
FRONTIERS IN GENETICS, 2021, 卷号: 11, 页码: 595334
作者:
Zhao,Yu-Juan
;
Yin,Gen-Shen
;
Pan,Yue-Zhi
;
Tian,Bo
;
Gong,Xun
Adobe PDF(3084Kb)
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浏览/下载：93/19
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提交时间：2022/04/02
climate change
Himalaya-Hengduan Mountains
Paeonia
Pleistocene
refugia
speciation
EVOLUTIONARY HISTORY
SPECIES DELIMITATION
POPULATION-GENETICS
PLANT DIVERSITY
PHYLOGEOGRAPHY
CHLOROPLAST
MOUNTAINS
INFERENCE
SOFTWARE
DIVERSIFICATION
Introduction of Neolophiotrema xiaokongense gen. et sp. nov. to the poorly represented Anteagloniaceae (Pleosporales, Dothideomycetes)
期刊论文
PHYTOTAXA, 2021, 卷号: 482, 期号: 1, 页码: 25-35
作者:
Ren,Guang-Cong
;
Wanasinghe,Dhanushka N.
;
Monkai,Jutamart
;
Hyde,Kevin D.
;
Mortimer,Peter E.
;
Xu,Jianchu
;
Pang,Aimin
;
Gui,Heng
Adobe PDF(3002Kb)
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浏览/下载：95/5
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提交时间：2022/04/02
2 new taxa
guttulate
phylogeny
saprobic
taxonomy
BAYESIAN PHYLOGENETIC INFERENCE
MULTIPLE SEQUENCE ALIGNMENT
YUNNAN PROVINCE
DIVERSITY
FUNGI
PROBABILITY
REAPPRAISAL
CHOICE
