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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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孙航 [10]
孙卫邦 [10]
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税玉民 [7]
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GST, P < 0.05) were exhibited by this species. The SAMOVA revealed seven diverging groups of related chlorotypes, six of them had distinct nonoverlapping geographical ranges: one in the northeast comprising 10 populations, a second with a southeast distribution comprising 22 populations, and the remaning four groups comprising 15 populations located in the west part of the species’ range along different river valleys. The genetic clustering of populations into three regions was also supported by analysis of molecular variance, which showed that most genetic variation (82.43%) was found among these three regions. Two clusters were distinguished by both phylogenetic analysis and genealogical analysis of chlorotypes, one consisting of chlorotypes from the western region and the second consisting of those from the eastern region. Significant genetic differences between the two regions might be attributed to vicariance and restricted gene flow, and this vicariance could be explained by the physical environmental heterogeneity on each side of the Tanaka-Kaiyong Line. Following the uplift of the Tibetan Plateau, the reorganization of the major river drainages was primarily caused by river separation and capture events. These historical events could change the distribution of S. davidii from fragmented to continuous (Upper/Lower Jinshajiang and Yalongjiang/Daduhe), and from continuous to fragmented (Nujiang and Jinshajiang/Honghe). However, spatial and temporal patterns of phylogeographic divergence are strongly associated with historical disjunction rather than modern drainage connections. Moreover, the following north-south split in the eastern region and effective isolation with their genetic diversity were essentially modelled by genetic drift. The higher chlorotype richness and genetic divergence for populations in western region compared with other two regions suggests that there were multipe refugia or in situ survival of S. davidii in the Himalayan-Hengduan Mountain region. Fixation of chlorotypes in the northeastern region and near fixation in the southeastern region suggest a recent colonization of these areas. We further found that this species underwent past range expansion around 37-303 thousand years ago (kya). The southeastern populations likely experienced a demographic expansion via unidirectional gene flow along rivers, while northeastern populations underwent a more northward expansion, both from initial populations (s) (21, 22, 23) preserved on eastern refugia (Jinshajiang). This process might have been accompanied with a series of founder effects or bottlenecks making populations genetically impoverished. 3. Phylogeographic analysisbased on nuclear sequence，We sequenced the nuclear (ncpGS) region in all populations sampled, recovering 23 nuclear haplotypes. Compared to cpDNA, both NST (0.470) and GST (0.338) were relatively lower, but NST was also significantly larger than GST. 37.10% of the total variation was distributed among regions which was much lower than that shown by chlorotypes. Thus, more extensive distribution of nuclear haplotypes was exhibited across the geographical range instead of the strong population subdivision observed in chlorotypes. Similarly to the chloroplast data, we found that genetic differentiation of nDNA was positively correlated with the geographical distance, but the increase in the geographical distance between populations did not increase the genetic differentiation of nDNA as rapidly as that of cpDNA. These contrasting levels between the chloroplast and nuclear genomes of S. davidii are likely due to limited gene flow of cpDNA by seeds vs. the extensive gene flow of nDNA by wind-mediated pollen in the population history. We also determined from nuclear markers that haplotype diversity was reduced in the southeastern and northeastern regions due to the loss of rare haplotypes in western region. This reduction of gene diversity is also a signature of founder events or recent bottleneck during post-glacial colonization. However, nuclear diversity within populations remains high. This provides evidence that regionally pollen flow might be sufficiently high to blur the genetic identity of founder populations over a reasonably large spatial scale.3. Relationships among three varieties，The phylogenetic analysis identified two phylogroups of chlorotypes, corresponding to S. davidii var. davidii and var. chuansinesis. The former was distinguished by the abscence of predonminant nuclear haplotype H1 of the latter. The monophyletic group of chlorotypes in var. davidii and var. liangshanesis showed their relatively close relationship. And their genetic divergence from the third variety appears to be relative to their slight morphological difference in leaf size and the divergent environmental niche spaces they occupy. Thus, the observed differences in morphological characters between var. chuansinesis and other two varieties can be explained by the seed dispersal limitation illustrated above (as inferred by geographical separation) and by environmental heterogeneity (as inferred by precipitation or elevation) or by a combination of both. After all, the geological changes, drainage reorganization, and floristic differences following the Himalayan uplift have been suggested to affect the genetic structure of S. davidii. These results provide new insights into the phylogeographic pattern of plants in China. In addition, the unique population genetic structure found in S. davidii has provided important insights into the evolutionary history of this species. The genetic profile uncovered in this study is also critical for its conservation management. Our study has uncovered the existence of at least two ‘evolutionary significant units’ independent units within S. davidii, corresponding to var. davidii from eastern region and var. chuansinensis from western region. The conservation efforts should first focus on most western populations and on the southeastern ones exhibiting high levels of genetic diversity, while the genetically homogeneous northeastern populations located in the degraded Loess Plateau should require much greater conservation 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Paddy Rice Phenological Mapping throughout 30-Years Satellite Images in the Honghe Hani Rice Terraces
期刊论文
REMOTE SENSING, 2023, 卷号: 15, 期号: 9, 页码: 2398
作者:
Yang,Jianbo
;
Xu,Jianchu
;
Zhou,Ying
;
Zhai,Deli
;
Chen,Huafang
;
Li,Qian
;
Zhao,Gaojuan
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Adobe PDF(4239Kb)
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浏览/下载：7/3
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提交时间：2024/05/09
Honghe Hani Rice Terraces
Landsat
land use/land cover
phenology
Google Earth Engine
AGRICULTURAL LANDSCAPES
LANDSAT IMAGES
RANDOM FOREST
CHINA
CROP
CONSERVATION
INTEGRATION
MANAGEMENT
KNOWLEDGE
FRAMEWORK
中国云南的微型真菌：蕨类植物上子囊菌的案例研究
学位论文
: 中国科学院大学, 2022
作者:
Rungtiwa Phookamsak
Adobe PDF(18195Kb)
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浏览/下载：31/0
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提交时间：2024/05/14
子囊菌，中国真菌，内生菌，真菌多样性，形态-分子学方法，腐生真菌，分类学
Ascomycota, Chinese mycota, Endophytes, Fungal diversity, morpho-molecular approaches, Saprobic fungi, Taxonomy
干热河谷特色生态修复物种筛选与农林复合系统构建
学位论文
: 中国科学院大学, 2022
作者:
赵高卷
Adobe PDF(5740Kb)
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浏览/下载：0/0
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提交时间：2024/05/14
干热河谷，种质资源，农林复合系统，抗旱机制，生物固氮，乔灌草立体修复模式，生态恢复
dry-hot valley, germplasm resources, agroforestry system, drought resistance mechanism, biological nitrogen fixation, three-dimensional trees-shrubs-herbs restoration model, ecological restoration
Investigation on types of corn rust in eastern Yunnan ecology and analysis of population genetic structure of its rusts
期刊论文
ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE, 2022, 卷号: 72, 期号: 1, 页码: 485-495
作者:
Zhu Wenqiang
;
Wang Jingran
;
Wu Qi
;
Wang Na
;
Guo Jianwei
;
Yang Zilin
;
Sha Yun
;
Liu Lin
;
Li Chengyun
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Adobe PDF(3109Kb)
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浏览/下载：81/15
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提交时间：2022/04/02
Puccinia polysora Unedrw
Puccinia sorghi Schw
identification of pathogen
population genetic structure
specific molecular marker primers
红河干热河谷主要芒果(Mangifera indica L.)品种对海拔的生理生态响应
学位论文
, 2021
作者:
TEWODROS TESFAYE WUBSHET
Adobe PDF(7202Kb)
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浏览/下载：102/0
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提交时间：2024/03/20
基于功能基因组学解析黄曲霉菌降解聚氨酯分子机理的初步研究
学位论文
, 2021
作者:
张世杰
Adobe PDF(3519Kb)
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浏览/下载：11/0
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提交时间：2024/03/20
资源植物板蓝（Strobilanthes cusia）可持续利用的价值链研究
学位论文
, 2021
作者:
邱祖川
Adobe PDF(2652Kb)
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浏览/下载：461/0
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提交时间：2024/03/20
Morpho-Phylo Taxonomy of Novel Dothideomycetous Fungi Associated With Dead Woody Twigs in Yunnan Province, China
期刊论文
FRONTIERS IN MICROBIOLOGY, 2021, 卷号: 12, 页码: 654683
作者:
Mortimer,Peter E.
;
Jeewon,Rajesh
;
Xu,Jian-Chu
;
Lumyong,Saisamorn
;
Wanasinghe,Dhanushka N.
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浏览/下载：83/0
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提交时间：2022/04/02
Ascomycota
coelomycetes
Honghe
Kunming
Pleosporales
Yuxi
FRESH-WATER FUNGI
INHABITING FUNGI
SOUTHERN CHINA
SP-NOV
MORPHOLOGICAL CHARACTERIZATION
PHYLOGENETIC-RELATIONSHIPS
NATURAL CLASSIFICATION
SEQUENCE ALIGNMENT
REFINED FAMILIES
GEN. NOV.
Insight into the Systematics of Microfungi Colonizing Dead Woody Twigs of Dodonaea viscosa in Honghe (China)
期刊论文
JOURNAL OF FUNGI, 2021, 卷号: 7, 期号: 3, 页码: 180
作者:
Wanasinghe,Dhanushka N.
;
Mortimer,Peter E.
;
Xu,Jianchu
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浏览/下载：56/0
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提交时间：2022/04/02
Ascomycota
Asexual morph
Capnodiales
Greater Mekong Subregion
Hysteriales
Pleosporales
Sexual morph
Yunnan
MULTIGENE PHYLOGENY
GUIZHOU PROVINCE
FRESH-WATER
SP. NOV.
SEQUENCE ALIGNMENT
FUNGI
NUCLEAR
GENUS
ADDITIONS
DIVERSITY
A new species of Volvariella and the first record of Volvariella pulla (Agaricales: incertae sedis) from Thailand
期刊论文
PHYTOTAXA, 2021, 卷号: 480, 期号: 3, 页码: 237-250
作者:
Niego,Allen Grace T.
;
Sysouphanthong,Phongeun
;
Thongklang,Naritsada
;
Hyde,Kevin D.
;
Phonemany,Monthien
;
Phookamsak,Rungtiwa
;
Raspe,Olivier
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Adobe PDF(3392Kb)
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浏览/下载：87/25
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提交时间：2022/04/02
1 new species
ITS
LSU
new record
phylogeny
taxonomy
BASIDIOMYCOTA
CANTHAROCYBE
PLUTEACEAE
PHYLOGENY
ALIGNMENT
GENUS
TOOL
