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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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study can reveal important biological features of plants and answers to a certain degree in phylogeny and distribution of genetic materials and so forth. By hard working of cytologists, chromosome data of plants have been increased to a great abundance, but yet disorderly distributed in different magazines, which made researches based on the whole chromosome data of one taxon rarely launched. Scientific databases have become increasingly indispensable as researching data growing daily. As Cytological studies are booming in China, in order to fill the absence of digital and statistical data of plant chromosome researches and chromosome atlas, we started to develop a Chinese Seed Plants Chromosome Database, aiming to construct a database and start to record published chromosome data of Chinese seed plants. Based on this database, we chose the part of gymnosperms and gave a discussion to the features of its chromosomes’ evolution and variation. Cytological experiments have been applied to some important phyto-groups for phylogeny research and germplasm identification.Part I: The Chinese Seed Plants Chromosome Database and Discussion on the features of Gymnosperms chromosomes，1 The Chinese Seed Plants Chromosome Database，The frame of database was constructed by Microsoft Access 2003. 19 items of data were included in, they are: Chinese and Latin names of family, genus and species; plant pictures, mitosis metaphase and karyotype figures; morphological characteristics and distributions of the plant; chromosome numbers and basic numbers; karyotype formula; karyotype description; origin of the plant material; literature and the source of photos. In this database, data can be checked and shared easily by extracted out in species sorted interface or family sorted interface. 120 species in 29 genera and 10 families of Gymnospers have been collected and input to the database. In Angiosperms, 61 species in 10 genera of family Magnoliaceae and 80 species in 3 genera of family Theaceae have been collected and input to the database.2 Discussion on the features of evolution and variation of Gymnosperms chromosomes，By data collection of the database, we analyzed chromosome features of the group Gymnosperm. Plants of Gymnosperm had been through a long historical evolution on earth, fossil records of which originated from the late Devonian period. Once an authoritative and major classification level in the plant kingdom, most Gymnosperms have been extinct unless conifers, cycads, Ginkgo and Getales. Three main features of Gymnosperm chromosomes are: relatively large chromosome, which can be recognized from figures in the database; constant chromosome numbers, in most families of Gymnosperm the basic chromosome number keeps a certain value; comparatively low variation, karyotype under family level differs a little. The variation of chromosomes in Gymnosperm is dominated by Robertsonian changes. Contrary to common variation type in Angiosperms, the variation from high unsymmetric karyotype to low unsymmetric karyotype was found in existence in Gymnosperm.Part II: cytology research on some important phyto-groups，3 Karyomorphology of three species in the order Huerteales and their phylogenetic implications，The karyomorphology of three species in Dipentodon (Dipentodontaceae), Perrottetia (Celastraceae), and Tapiscia (Tapisciaceae), namely Dipentodon sinicus, Perrottetia racemosa, and Tapiscia sinensis, was investigated in the study. Recent molecular research has discovered close relationships among these three genera, which has led to the establishment of the order Huerteales with Perrottetia being placed in Dipentodontaceae. Herein we report the chromosome numbers of D. sinicus and P. racemosa for the first time, and present their karyotype formulas as 2n = 34 = 22sm + 12st (D. sinicus), 2n = 20 = 11m + 9sm (P. racemosa), and 2n = 30 = 22m(2SAT) + 8sm (T. sinensis). Asymmetry of their karyotypes is categorized to be Type 3B in D. sinicus, Type 2A in P. racemosa, and Type 2A in T. sinensis. Each of the species shows special cytological features. Compared with Perrottetia, Dipentodon has a different basic chromosome number, a higher karyotype asymmetry, and different karyomorphology of its interphase nuclei, mitotic prophase, and metaphase. Thus, on the basis of these results, we have reservations regarding the suggestion of placing Dipentodon and Perrottetia together in the family Dipentodontaceae.4 Genomic analyses of intergeneric hybrids between Michelia crassipes and M. calcicola by GISH，Genomic in situ hybridization (GISH) is becoming the method of choice for identifying parental chromosomes in interspecific hybrids. Interspecific F1 hybrid between Michelia crassipes and M. calcicola, tow highly ornamental species in Michelia of Magnolicaceae, has been analized by double-colored GISH with its parents’ genome as the probe. Research gave the results that the chromosome number of the F1 hybrid is 2n=38 as the same of species in Michelia and other genera in Magnoliaceae, the basic chromosome is x=19, the karyotype formula is 2n=38=32m+6sm, and the asymmetry of karyotype is 1B type. Based on chromosome data of Michelia in our database, the karyotype of this genus is featured mostly by metacentric chromosomes and submetacentric chromosomes. In Mechelia, the variation range of submetacentric chromosomes is 4 to 18 and of the karyotype asymmetry is 1A to 2B type. Both the karyotype and karyotype asymmetry type of F1 hybrid is among the variation range of Michelia. The figure of GISH showed that all the 38 chromosomes of F1 hybrid have crossing parental signals, and signal on the no.1 and no.7 chromosome showed differences, which proved that both the parental genome have been transmitted to and recombinated in F1 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Evolutionary ecology of plant-plant interactions
期刊论文
出版物, 3111, 页码: 1-144
作者:
Zuo Z(作者)
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提交时间：2017/07/19
A new lignicolous hyphomycete species of Neospadicoides in Xenospadicoidaceae (Xenospadicoidales) from Thailand
期刊论文
PHYTOTAXA, 2023, 卷号: 619, 期号: 2, 页码: 161-172
作者:
Xu,Rong-Ju
;
Zhu,Ying-An
;
Li,Lu
;
Yu,Feng-Ming
;
Boonmee,Saranyaphat
;
Zhao,Qi
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提交时间：2024/05/09
asexual hyphomycetes
decaying wood
phylogeny
taxonomy
Sordariomycetes
FRESH-WATER FUNGI
PHYLOGENETIC ANALYSIS
SP-NOV
ALIGNMENT
RECORDS
CHOICE
GENERA
GEN.
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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.
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Lean-Teik,N. G.
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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
Morphological and molecular analyses reveal two new species of Termitomyces (Agaricales, Lyophyllaceae) and morphological variability of T. intermedius
期刊论文
MYCOKEYS, 2023, 期号: 95, 页码: 61-82
作者:
Tang,Song-Ming
;
Vadthanarat,Santhiti
;
He,Jun
;
Raghoonundon,Bhavesh
;
Yu,Feng-Ming
;
Karunarathna,Samantha C.
;
Li,Shu-Hong
;
Raspe,Olivier
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浏览/下载：27/4
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提交时间：2024/05/09
2 new species
morphology
multi-gene phylogeny
taxonomy
tropical Asia
Yunnan
PHYLOGENETIC-RELATIONSHIPS
TAXONOMIC REVISION
EDIBLE MUSHROOM
BASIDIOMYCOTA
SOFTWARE
CHINA
NOV
KEY
Exploring the Diversity and Systematics of Phaeosphaeriaceae: Taxonomic Novelties from Ecologically Diverse Habitats and Their Phylogenetic Resolution
期刊论文
JOURNAL OF FUNGI, 2023, 卷号: 9, 期号: 8, 页码: 853
作者:
Wanasinghe,Dhanushka N.
;
Maharachchikumbura,Sajeewa S. N.
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浏览/下载：16/1
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提交时间：2024/05/09
Ascomycota
multi-gene phylogeny
phragmosporous spores
taxonomy
terrestrial habitats
SP. NOV.
GEN. NOV
GENERA
FUNGI
TAXA
CLASSIFICATION
REVISION
NUCLEAR
TOOL
Multi-Gene Phylogeny and Taxonomy of the Wood-Rotting Fungal Genus Phlebia sensu lato (Polyporales, Basidiomycota)
期刊论文
JOURNAL OF FUNGI, 2023, 卷号: 9, 期号: 3, 页码: 320
作者:
Zhao,Changlin
;
Qu,Menghan
;
Huang,Ruoxia
;
Karunarathna,Samantha C.
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浏览/下载：26/3
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提交时间：2024/05/09
biodiversity
degradation
Meruliaceae
molecular systematics
wood-inhabiting fungi
SP. NOV. POLYPORALES
MOLECULAR-IDENTIFICATION
MORPHOLOGICAL CHARACTERS
1ST RECORD
MERULIACEAE
CLASSIFICATION
MUSHROOMS
INFERENCE
CHINA
PHANEROCHAETE
Six new species of zombie-ant fungi from Yunnan in China
期刊论文
IMA FUNGUS, 2023, 卷号: 14, 期号: 1, 页码: 9
作者:
Tang,Dexiang
;
Huang,Ou
;
Zou,Weiqiu
;
Wang,Yuanbing
;
Wang,Yao
;
Dong,Quanying
;
Sun,Tao
;
Yang,Gang
;
Yu,Hong
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浏览/下载：26/3
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提交时间：2024/05/09
6 new taxa
Camponotus
Living cultures
Morphology
Multi-gene phylogeny
Ophiocordyceps
Polyrhachis
Taxonomy
TROPICAL FOREST ECOSYSTEMS
OPHIOCORDYCEPS-UNILATERALIS
HOST MANIPULATION
ENTOMOPATHOGENIC FUNGI
SP.-NOV.
CORDYCEPS
OPHIOCORDYCIPITACEAE
FORMICIDAE
DIVERSITY
PARASITES
Species diversity of Hygrophorus in China and a phylogenetic study of the genus
期刊论文
MYCOSPHERE, 2023, 卷号: 14, 期号: 1, 页码: 1742-1834
作者:
Wang,C. Q.
;
Zhang,M.
;
He,X. L.
;
Liu,J. W.
;
Wei,T. Z.
;
Liu,T. Z.
;
Wang,K.
;
Adamcik,S.
;
Li,T. H.
;
Deng,W. Q.
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浏览/下载：97/8
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提交时间：2024/05/09
Hygrophoraceae
Novel taxa
Phylogeny
Taxonomy
Waxcap
EDIBLE MUSHROOM
RUSSULA-COMPLEX
SEQUENCE DATA
SP. NOV.
AGARICALES
OLIVACEOUMBRINI
CLADES
中国杯伞科的系统发育与分类研究
学位论文
: 中国科学院大学, 2022
作者:
何正蜜
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浏览/下载：18/0
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提交时间：2024/05/14
广义杯伞，杯伞科，金钱菌属，单拷贝同源直系基因，毒蕈碱
Clitocybe s.l., Clitocybaceae, Collybia, single-copy gene, muscarine
A global phylogeny of Lycopodiaceae (Lycopodiales; lycophytes) with the description of a new genus, Brownseya, from Oceania
期刊论文
TAXON, 2022, 卷号: 71, 期号: 1, 页码: 25-51
作者:
Chen,De-Kui
;
Zhou,Xin-Mao
;
Rothfels,Carl J.
;
Shepherd,Lara D.
;
Knapp,Ralf
;
Zhang,Liang
;
Lu,Ngan Thi
;
Fan,Xue-Ping
;
Wan,Xia
;
Gao,Xin-Fen
;
He,Hai
;
Zhang,Li-Bing
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浏览/下载：185/8
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提交时间：2022/04/02
Huperzia
Lycophyte Phylogeny
Lycopodiella Serpentina
Phlegmariurus
Phylloglossum
Vascular Plant Evolution
Complete Chloroplast Genome
Lycopodiopsida Lycopodiaceae
Generic Classification
Spore Morphology
Early Evolution
Land Plants
Rbcl Gene
Huperzia
Sequence
Likelihood
