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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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The legacy effects of rubber defoliation period on the refoliation phenology, leaf disease, and latex yield
期刊论文
PLANT DIVERSITY, 2023, 卷号: 45, 期号: 1, 页码: 98-103
作者:
Zhai,De-Li
;
Xu,Jian-Chu
Adobe PDF(1120Kb)
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浏览/下载：6/2
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提交时间：2024/05/09
Carbohydrate
Defoliation
Legacy effect
Phenology
Rubber trees
TROPICAL FORESTS
CLIMATE-CHANGE
XISHUANGBANNA
TREES
BIODIVERSITY
EXPANSION
IMPACTS
DEMAND
YUNNAN
Patterns of phylogenetic beta diversity measured at deep evolutionary histories across geographical and ecological spaces for angiosperms in China
期刊论文
JOURNAL OF BIOGEOGRAPHY, 2021, 卷号: 48, 期号: 4, 页码: 773-784
作者:
Qian,Hong
;
Jin,Yi
;
Leprieur,Fabien
;
Wang,Xianli
;
Deng,Tao
Adobe PDF(1074Kb)
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浏览/下载：102/33
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提交时间：2022/04/02
Chinese flora
environmental gradient
flowering plants
latitudinal gradient
phylogenetic beta diversity
1ST FOSSIL RECORD
VASCULAR PLANTS
SPECIES RICHNESS
ASIAN MONSOON
COMMUNITY STRUCTURE
NICHE CONSERVATISM
EASTERN ASIA
SCALE
TERRESTRIAL
ENVIRONMENT
The flux of root-derived carbon via fungi and bacteria into soil microarthropods (Collembola) differs markedly between cropping systems
期刊论文
SOIL BIOLOGY & BIOCHEMISTRY, 2021, 卷号: 160, 页码: 108336
作者:
Li,Zhipeng
;
Shi,Lingling
;
Kuzyakov,Yakov
;
Pausch,Johanna
;
Scheu,Stefan
;
Pollierer,Melanie M.
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浏览/下载：104/14
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提交时间：2022/04/02
Agroforestry
Bacterial energy channel
C-13 labeling
Collembola Fungal energy channel
NLFAs
MICROBIAL COMMUNITY COMPOSITION
ARBUSCULAR MYCORRHIZAL FUNGI
FOOD WEBS
FATTY-ACIDS
PLANT CARBON
ARABLE SOIL
RHIZOSPHERE
C-13
ASSIMILATION
NITROGEN
From the Wild to the Cup: Tracking Footprints of the Tea Species in Time and Space
期刊论文
FRONTIERS IN NUTRITION, 2021, 卷号: 8, 页码: 706770
作者:
Wambulwa,Moses C.
;
Meegahakumbura,Muditha K.
;
Kamunya,Samson
;
Wachira,Francis N.
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Adobe PDF(889Kb)
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浏览/下载：64/12
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提交时间：2022/04/02
tea
Camellia sinensis
footprints of tea
wild tea
origin of tea
tea domestication
expansion history
AMPLIFIED POLYMORPHIC DNA
CAMELLIA-SINENSIS
GENETIC DIVERSITY
CLIMATE
RELATIVES
DIFFERENTIATION
DOMESTICATION
INSIGHTS
HIMALAYA
ORIGIN
Spatial dynamics of Chinese Muntjac related to past and future climate fluctuations
期刊论文
CURRENT ZOOLOGY, 2021, 卷号: 67, 期号: 4, 页码: 361-370
作者:
Sun,Zhonglou
;
Orozco-terWengel,Pablo
;
Chen,Guotao
;
Sun,Ruolei
;
Sun,Lu
;
Wang,Hui
;
Shi,Wenbo
;
Zhang,Baowei
Adobe PDF(1007Kb)
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浏览/下载：84/17
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提交时间：2022/04/02
climate fluctuations
Middle Holocene
Muntiacus reevesi
spatial dynamics
suitable habitat
HIGH GENETIC DIVERSITY
POTENTIAL DISTRIBUTION
DABIE MOUNTAINS
POPULATION-STRUCTURE
ENVIRONMENTAL-CHANGE
DEMOGRAPHIC HISTORY
RANGE SHIFTS
MICROSATELLITE
SOFTWARE
REVEALS
人参属的系统发育及羽叶三七复合群的遗传关系研究
学位论文
, 2020
作者:
周明媚
Adobe PDF(8151Kb)
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浏览/下载：38/0
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提交时间：2023/11/02
Geological and Climatic Factors Affect the Population Genetic Connectivity in Mirabilis himalaica (Nyctaginaceae): Insight From Phylogeography and Dispersal Corridors in the Himalaya-Hengduan Biodiversity Hotspot
期刊论文
FRONTIERS IN PLANT SCIENCE, 2020
作者:
Rana, Hum Kala
;
Luo, Dong
;
Rana, Santosh Kumar
;
Sun, Hang
Adobe PDF(12956Kb)
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浏览/下载：97/13
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提交时间：2021/01/05
Transcriptome Dynamics of the Inflorescence in Reciprocally Formed AllopolyploidTragopogon miscellus(Asteraceae)
期刊论文
FRONTIERS IN GENETICS, 2020
作者:
Shan, Shengchen
;
Boatwright, J. Lucas
;
Liu, Xiaoxian
;
Chanderbali, Andre S.
;
Fu, Chaonan
;
Soltis, Pamela S.
;
Soltis, Douglas E.
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Adobe PDF(2919Kb)
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浏览/下载：70/11
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提交时间：2021/01/05
The saprotrophic Pleurotus ostreatus species complex: late Eocene origin in East Asia, multiple dispersal, and complex speciation
期刊论文
IMA FUNGUS, 2020
作者:
Li, Jing
;
Han, Li-Hong
;
Liu, Xiao-Bin
;
Zhao, Zhi-Wei
;
Yang, Zhu L.
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Adobe PDF(2764Kb)
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浏览/下载：113/16
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提交时间：2021/01/05
The relationship between elevation and seed-plant species richness in the Mt. Namjagbarwa region (Eastern Himalayas) and its underlying determinants
期刊论文
GLOBAL ECOLOGY AND CONSERVATION, 2020
作者:
Sun, Lu
;
Luo, Jian
;
Qian, Lishen
;
Deng, Tao
;
Sun, Hang
Adobe PDF(1835Kb)
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浏览/下载：88/17
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提交时间：2021/01/05
