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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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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
作者:
Jun Wen
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浏览/下载：473/8
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提交时间：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
Boletes clarified
期刊论文
出版物, 3111, 期号: 0, 页码: 1-38
作者:
David Arora
;
Jonathan L. Frank
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浏览/下载：425/1
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提交时间：2017/07/24
Appendiculati
Boletaceae
Butter Boletes
Butyriboletus
Molecular phylogenetics
New Genus
New Species
Taxonomy
Two new species of Primula (Primulaceae) from Yunnan, China
期刊论文
TAIWANIA, 2023, 卷号: 68, 期号: 2, 页码: 230-240
作者:
Yang,Bin
;
Ya,Ji-Dong
;
Zhang,Wei
;
Song,Yu
;
Wang,Wen
;
Zhu,Zheng-Min
;
He,Jiang-Hai
;
Zuo,Yun-Jun
;
Tan,Yun-Hong
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浏览/下载：204/54
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提交时间：2024/07/17
Primula barbicalyx
Primula intanoensis
Primula sugongii
Primula zhengyii
Primula zhui
Section Obconicolisteri
PLATFORM
SICHUAN
Home at last: Molecular phylogenetic analyses support subsuming Metastachydium within Phlomoides (Lamiaceae)
期刊论文
TAXON, 2023
作者:
Zhao,Yue
;
Zhao,Fei
;
Salmaki,Yasaman
;
Paton,Alan
;
Cai,Jie
;
Drew,Bryan T.
;
Mahmoudi,Chonour
;
Efimov,Petr
;
Turginov,Orzimat T.
;
Liang,Cun-Zhu
;
Chen,Ya-Ping
;
Xiang,Chun-Lei
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浏览/下载：141/22
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提交时间：2024/07/10
Central Asia
Lamioideae
nrITS
Phlomideae
Phlomis
plastome phylogenomics
COMPLETE CHLOROPLAST GENOME
PLASTID DNA
LEPECHINIA LAMIACEAE
LAMIOIDEAE LAMIACEAE
CHARACTER EVOLUTION
NUCLEAR
CLASSIFICATION
POSITION
ORIGIN
GENERA
Polycephalomycetaceae, a new family of clavicipitoid fungi segregates from Ophiocordycipitaceae
期刊论文
FUNGAL DIVERSITY, 2023, 卷号: 120, 期号: 1, 页码: 1-76
作者:
Xiao,Yuan-Pin
;
Wang,Yuan Bing
;
Hyde,Kevin D.
;
Eleni,Gentekaki
;
Sun,Jing-zu
;
Yang,Yu
;
Meng,Juan
;
Yu,Hong
;
Wen,Ting-Chi
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浏览/下载：174/46
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提交时间：2024/05/09
8 new taxa
Ophiocordyceps
Polycephalomyces
Hypocreales
Clavicipitoid fungi
Taxonomy
New family
Morphology
Phylogeny
MULTIGENE PHYLOGENY
ENTOMOPATHOGENIC GENUS
SP-NOV
MORPHOLOGY REVEAL
GUIZHOU PROVINCE
OPHIOCORDYCEPS
HYPOCREALES
ASCOMYCOTA
COMBINATIONS
EVOLUTION
Phylogeny and Taxonomic Revision of the Family Discinaceae (Pezizales, Ascomycota)
期刊论文
MICROBIOLOGY SPECTRUM, 2023
作者:
Wang,Xin-Cun
;
Yang,Zhu-Liang
;
Chen,Shuang-Lin
;
Bau,Tolgor
;
Li,Tai-Hui
;
Li,Lin
;
Fan,Li
;
Zhuang,Wen-Ying
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Adobe PDF(1971Kb)
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浏览/下载：217/43
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提交时间：2024/05/09
Ascomycota
phylogeny
taxonomy
3 new genera
2 new species
TRUE MORELS MORCHELLA
GYROMITRA
FUNGI
HELVELLACEAE
DIVERSITY
EVOLUTION
REVEALS
CLASSIFICATION
SYSTEMATICS
HYDNOTRYA
A new addition to the Helvella macropus group (Helvellaceae) from Southwestern China
期刊论文
PHYTOTAXA, 2023, 卷号: 613, 期号: 1, 页码: 39-46
作者:
Li,Tai-shun
;
Zhou,De-qun
;
Zhao,Qi
;
Zhang,Ying
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Adobe PDF(4474Kb)
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浏览/下载：195/46
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提交时间：2024/05/09
morphology
multigene analysis
Pezizales
phylogeny
MULTIPLE SEQUENCE ALIGNMENT
SADDLE FUNGI HELVELLA
ASCOMYCOTA
RECORDS
DIVERSITY
SOFTWARE
COMPLEX
Piptoporellus taiwanensis sp. nov. (Polyporales, Fomitopsidaceae) from Taiwan and its phytochemistry
期刊论文
PHYTOTAXA, 2023, 卷号: 625, 期号: 3, 页码: 289-300
作者:
Jen,Chia-,I
;
Lai,Ming-Nan
;
Ariyawansa,Hiran A.
;
Bandara,Asanka R.
;
Lean-Teik,N. G.
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浏览/下载：122/43
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提交时间：2024/05/09
One new species
Piptoporellus taiwanensis
Fomitopsis
secondary metabolites
MOLECULAR PHYLOGENY
BASIDIOMYCOTA
MORPHOLOGY
BIOACTIVITIES
POLYPORALES
ANTIOXIDANT
EXTRACTION
Mycobiont-specific primers facilitate the amplification of mitochondrial small subunit ribosomal DNA: a focus on the lichenized fungal genus Melanelia (Ascomycota, Parmeliaceae) in Iceland
期刊论文
MYCOKEYS, 2023, 期号: 96, 页码: 57-75
作者:
Xu,Maonian
;
Liu,Yingkui
;
Moller,Erik
;
LaGreca,Scott
;
Moya,Patricia
;
Wang,Xinyu
;
Timdal,Einar
;
de Boer,Hugo
;
Barreno,Eva
;
Wang,Lisong
;
Thues,Holger
;
Andresson,Olafur
;
Magnusson,Kristinn Petur
;
Olafsdottir,Elin Soffia
;
Heidmarsson,Starri
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Adobe PDF(1831Kb)
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浏览/下载：184/22
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提交时间：2024/05/09
Melanelia
mtSSU
Parmeliaceae
PCR
primer design
INTERNAL TRANSCRIBED SPACER
PCR PRIMERS
REGION
SEQUENCE
Phylogenetic analysis and temporal diversification of the tribe Alsineae (Caryophyllaceae) with the description of three new genera, Hesperostellaria, Reniostellaria and Torreyostellaria
期刊论文
FRONTIERS IN PLANT SCIENCE, 2023, 卷号: 14, 页码: 1127443
作者:
Xue,Bine
;
Song,Zhuqiu
;
Cai,Jie
;
Ma,Zhonghui
;
Huang,Jiuxiang
;
Li,Yuling
;
Yao,Gang
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Adobe PDF(6634Kb)
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浏览/下载：177/46
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提交时间：2024/05/09
Alsineae
Caryophyllaceae
diversification
new combination
new genus
phylogeny
RAPID RADIATION
CHARACTER EVOLUTION
MOLECULAR PHYLOGENY
CARBON-CYCLE
GENUS
BIOGEOGRAPHY
DIVERSITY
DELIMITATION
DUPLICATIONS
DISPERSAL
