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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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中国科学院东亚植物... [69]
共享文献 [54]
资源植物与生物技术... [45]
昆明植物所硕博研究... [23]
中国西南野生生物种... [11]
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许建初 [39]
李德铢 [14]
周浙昆 [8]
Sun Hang [5]
王红 [5]
邓涛 [5]
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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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Systematics and Biogeography of Aralia L. (Araliaceae):Revision of Aralia Sects. Aralia, Humiles, Nanae, andSciadodendron
期刊论文
出版物, 3111, 卷号: 57, 期号: 0, 页码: 1-172
Authors:
Jun Wen
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Submit date：2017/07/24
Aralia
Aralia Sect. Aralia
Aralia Sect. Dimorphanthus
Aralia Sect. Humiles
Aralia Sect. Nanae
Aralia Sect. pentapanax
Aralia Sect. Sciadodendron
Biogeography
Araliaceae
Systematics
Population Differentiation and Demographic History of the Cycas taiwaniana Complex (Cycadaceae) Endemic to South China as Indicated by DNA Sequences and Microsatellite Markers
期刊论文
FRONTIERS IN GENETICS, 2019, 卷号: 10, 页码: 15
Authors:
Wang, Xin-Hui
;
Li, Jie
;
Zhang, Li-Min
;
He, Zi-Wen
;
Mei, Qi-Ming
;
Gong, Xun
;
Jian, Shu-Guang
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Submit date：2020/03/18
Cycas taiwaniana complex
genetic diversity
phylogeographic structure
population dynamics
conservation
Born migrators: Historical biogeography of the cosmopolitan family Cannabaceae
期刊论文
JOURNAL OF SYSTEMATICS AND EVOLUTION, 2019, 页码: 13
Authors:
Jin, Jian-Jun
;
Yang, Mei-Qing
;
Fritsch, Peter W.
;
van Velzen, Robin
;
Li, De-Zhu
;
Yi, Ting-Shuang
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Submit date：2020/03/18
ancestral geographical range analysis
Cannabaceae
dispersal
molecular dating
Northern Hemisphere
phylogeny
Importance of a single population demographic census as a first step of threatened species conservation planning
期刊论文
BIODIVERSITY AND CONSERVATION, 2019, 页码: 17
Authors:
Volis, Sergei
;
Deng, Tao
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Submit date：2020/03/18
Protected areas
Population demography
Size structure
Threatened tree species
Plant conservation
Conservation strategy
Monsoon-induced errors in paleotemperature estimation based on leaf morphology analysis in central Japan
期刊论文
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, 2019, 卷号: 533, 页码: 11
Authors:
Wang, Yuqing
;
Momohara, Arata
;
Huang, Yong-Jiang
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Submit date：2019/11/07
East Asian monsoon
Leaf margin analysis
Plant habit
Paleoclimate
Snow cover
Differences in pteridophyte diversity between limestone forests and non-limestone forests in the monsoonal tropics of southwestern China
期刊论文
PLANT ECOLOGY, 2019, 卷号: 220, 期号: 10, 页码: 917-934
Authors:
Phoutthavong, Kittisack
;
Nakamura, Akihiro
;
Cheng, Xiao
;
Cao, Min
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Submit date：2019/11/07
Karst forest
Indicator species
Local endemism
Pteridophyte
Species turnover
Tropical rainforest
Xishuangbanna
Surface conductance for evapotranspiration of tropical forests: Calculations, variations, and controls
期刊论文
AGRICULTURAL AND FOREST METEOROLOGY, 2019, 卷号: 275, 页码: 317-328
Authors:
Tan, Zheng-Hong
;
Zhao, Jun-Fu
;
Wang, Guan-Ze
;
Chen, Meng-Ping
;
Yang, Lian-Yan
;
He, Chun-Sheng
;
Restrepo-Coupe, Natalia
;
Peng, Shu-Shi
;
Liu, Xue-Yan
;
da Rocha, Humberto R.
;
Kosugi, Yoshiko
;
Hirano, Takashi
;
Salesk, Scott R.
;
Goulden, Michael L.
;
Zeng, Jiye
;
Ding, Fang-Jun
;
Gao, Fu
;
Song, Liang
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Submit date：2019/10/14
Boundary layer conductance
Penman-Monteith equation
Maximum surface conductance
Energy imbalance correction
Jarvis stomata model
Converting forests into rubber plantations weakened the soil CH4 sink in tropical uplands
期刊论文
LAND DEGRADATION & DEVELOPMENT, 2019, 页码: 12
Authors:
Lang, Rong
;
Goldberg, Stefanie
;
Blagodatsky, Sergey
;
Piepho, Hans-Peter
;
Harrison, Rhett D.
;
Xu, Jianchu
;
Cadisch, Georg
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Submit date：2019/10/28
deforestation
land-use change
methane
rubber plantation
soil moisture
soil texture
tropics
After the rubber boom: good news and bad news for biodiversity in Xishuangbanna, Yunnan, China
期刊论文
REGIONAL ENVIRONMENTAL CHANGE, 2019, 卷号: 19, 期号: 6, 页码: 1713-1724
Authors:
Zhang, Jia-Qi
;
Corlett, Richard T.
;
Zhai, Deli
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Submit date：2019/09/10
Deforestation
Fragmentation
Rubber plantations
Biodiversity
Conservation
China
The relationship between leaf physiognomy and climate based on a large modern dataset: Implications for palaeoclimate reconstructions in China
期刊论文
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, 2019, 卷号: 527, 页码: 1-13
Authors:
Chen, Wen-Yun
;
Su, Tao
;
Jia, Lin-Bo
;
Zhou, Zhe-Kun
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Submit date：2019/07/29
Dicot Trees
Distribution Pattern
Asian Monsoon
Multivariate Statistics
Precipitation
Temperature
