|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Antimony speciation in the environment:Recent advances in understanding the biogeochemical processes and ecological effects显示文摘Antimony(Sb) is a toxic metalloid, and its pollution has become a global environmental problem as a result of its extensive use and corresponding Sb-mining activities. The toxicity and mobility of Sb strongly depend on its chemical speciation. In this review, we summarize the current knowledge on the biogeochemical processes(including emission, distribution,speciation, redox, metabolism and toxicity) that trigger the mobilization and transformation of Sb from pollution sources to the surrounding environment. Natural phenomena such as weathering, biological activity and volcanic activity, together with anthropogenic inputs, are responsible for the emission of Sb into the environment. Sb emitted in the environment can adsorb and undergo redox reactions on organic or inorganic environmental media, thus changing its existing form and exerting toxic effects on the ecosystem. This review is based on a careful and systematic collection of the latest papers during 2010–2017 and our research results, and it illustrates the fate and ecological effects of Sb in the environment. | Mengchang He Ningning Wang Xiaojing Long Chengjun Zhang Congli Ma Qianyun Zhong Aihua Wang Ying Wang Aneesa Pervaiz Jun Shan | 2019 | Journal of Environmental Sciences2019，31，1： | 40 |
| 2 | Speciation with gene flow via cycles of isolation and migration:insights from multiple mangrove taxa显示文摘Allopatric speciation requiring an unbroken period of geographical isolation has been the standard model of neo-Darwinism. While doubts have been repeatedly raised, strict allopatry without any gene flow remains a plausible mechanism in most cases. To rigorously reject strict allopatry, genomic sequences superimposed on the geological records of a well-delineated geographical barrier are necessary. The Strait of Malacca,narrowly connecting the Pacific and Indian Ocean coasts, serves at different times either as a geographical barrier or a conduit of gene flow for coastal/marine species. We surveyed 1700 plants from 29 populations of 5 common mangrove species by large-scale DNA sequencing and added several whole-genome assemblies. Speciation between the two oceans is driven by cycles of isolation and gene flow due to the fluctuations in sea level leading to the opening/closing of the Strait to ocean currents. Because the time required for speciation in mangroves is longer than the isolation phases, speciation in these mangroves has proceeded through many cycles of mixing-isolation-mixing, or MIM, cycles. The MIM mechanism, by relaxing the condition of no gene flow, can promote speciation in many more geographical features than strict allopatry can. Finally, the MIM mechanism of speciation is also efficient, potentially yielding mn(m > 1) species after n cycles. | Ziwen He Xinnian Li Ming Yang Xinfeng Wang Cairong Zhong Norman C.Duke Chung-I Wu Suhua Shi | 2019 | National Science Review2019，6，2： | 14 |
| 3 | High time resolution observation and statistical analysis of atmospheric light extinction properties and the chemical speciation of fine particulates显示文摘In recent years,the visibility deterioration caused by regional fine particulate pollution becomes one of the crucial air pollution problems in the urban areas of our country.The rapid variation of visibility and fine particulates make it difficult to estimate the relationship between them precisely and accurately unless high time resolution observation data can be accessed.This study aims to fill this gap in the field of atmospheric science by establishing a formula using multiple linear regressions.Excellent fitting goodness (R2=0.913,n=3167) was obtained using 10 min average of high-resolution real-time light scattering coefficients,light absorption coefficients,main chemical speciation concentration in PM1 and some meteorological parameters from 17 Jan to 16 Feb,2009.It shows that the average light extinction coefficient during the observation in the winter of Shenzhen was measured to be 290 ± 183 Mm?1,consisting of 72% of light scattering and 21% of absorption.In terms of the percentage contribution of PM1 chemical species to the total light extinction,the organic matter was estimated to be most with an average of 45%,followed by ammonium sulfate with an average of 24%.The contributions of black carbon and ammonium nitrate were 17% and 12%,respectively.Besides,the diurnal variation of light extinction was investigated as well in this study. | YAO TingTing1,HUANG XiaoFeng1,HE LingYan1,HU Min2,SUN TianLe1,XUE Lian1,LIN Yun1,ZENG LiWu1 & ZHANG YuanHang2 1Key Laboratory for Urban Habitat Environmental Science and Technology,School of Environment and Energy,Peking University Shenzhen Graduate School,Shenzhen 518055,China 2State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China | 2010 | Science China Chemistry2010，53，8： | 10 |
| 4 | Molecular mechanisms of hybrid sterility in rice显示文摘Hybrid sterility presents a major bottleneck in hybrid crop breeding and causes postzygotic reproductive isolation in speciation.Here, we summarize the current understanding of the genetics of rice hybrid sterility and highlight new advances in deciphering the molecular basis of the major genetic loci for hybrid sterility in rice. We also discuss practical strategies for overcoming reproductive barriers to utilize hybrid vigor in inter-specific and inter-subspecific hybrid rice breeding. | Yongyao Xie Rongxin Shen Letian Chen Yao-Guang Liu | 2019 | Science China(Life Sciences)2019，62，6： | 8 |
| 5 | Geochemical fractionation and ecological risks assessment of benthic sediment-bound heavy metals from coastal ecosystems off the Equatorial Atlantic Ocean显示文摘This study determines the pollution, fractionation, and ecological risks of sediment-bound heavy metals from coastal ecosystems off the Equatorial Atlantic Ocean. Contamination Factor(CF), pollution load index(PLI), and geoaccumulation index(Igeo) were used to assess the extent of the heavy metal pollution, while the potential ecological risk was evaluated using the risks assessment code(RAC) and Hkanson potential ecological risk. The analysis revealed concentrations(mg/g, dw) of the cadmium(Cd),chromium(Cr), copper(Cu), nickel(Ni), and lead(Pb) in sediments for wet and dry seasons vary from 4.40-5.08, 14.80-21.09. 35.03-44.8, 2.14-2.28, and 172.24-196.39, respectively. The results also showed that the metal fractionation percentages in the residual, oxidizable, and reducible fractions are the most significant, while the exchangeable and carbonate bound trace metals are relatively low. The RAC values indicate no risk for Cd and Ni and low risk for other metals at all the studied sites during both seasons.Potential ecological risk analysis of the heavy metal concentrations indicates that Cd had high individual potential ecological risk, while the other metals have low risk at all investigated sites. The multi-elemental potential ecological risk indices(R_1) indicate high ecological risk in all the ecosystems. | Nsikak U. Benson Essien D. Udosen Joseph P. Essien Winifred U. Anake Adebusayo E. Adedapo Oyeronke A. Akintokun Omowunmi H. Fred-Ahmadu Abass A. Olajire | 2017 | International Journal of Sediment Research2017，32，3： | 8 |
| 6 | The effect of low-molecular-weight organic-acids(LMWOAs)on treatment of chromium-contaminated soils by compost-phytoremediation: Kinetics of the chromium release and fractionation显示文摘A soil–plant biological system was developed from chromium(Cr) polluted soil treated by the compost-phytoremediation method. The transformation and migration of the Cr in this system is comprehensively studied in this research. The results illustrated that the co-composting treatment can reduce the Cr availability from 39%(F1 was about 31% of total, F2 was about 8% of total) to less than 2% by stabilizing the Cr. However, herbaceous plants can accumulate the concentrations of Cr from 113.8 to 265.2 mg/kg in the two crops,even though the concentration of soluble Cr in the substrate soil was below 0.1 mg/L.Cr can be assimilated and easily transferred in the tissues of plants because the lowmolecular-weight organic-acids(LMWOAs) derived from the plant root increase the bioavailability of Cr. The amount of extracted Cr dramatically increased when the organic acids were substituted in this order: citric acid > malic acid > tartaric acid > oxalic acid >acetic acid. On average the maximum(147.4 mg/kg) and the minimum(78.75 mg/kg) Cr were extracted by 20 mmol/L citric acid and acetic acid, respectively. The desorption of Cr in different acid solutions can be predicted by the pseudo second-order kinetics. The exchangeable Cr, carbonate-bound Cr, and residual Cr decreased, while Fe–Mn oxide bound Cr and organic bound Cr increased in the soil solid phase. According to the experimental results, the organic acids will promote the desorption and chelation processes of Cr, leading to the remobilization of Cr in the soil. | Huixia Chen Junfeng Dou Hongbin Xu | 2018 | Journal of Environmental Sciences2018，30，8： | 8 |
| 7 | Artificial Selection in Domestication and Breeding Prevents Speciation in Rice显示文摘Speciation has long been regarded as an irreversible process once the reproductive barriers had been established.However,unlike in natural populations,artificial selection might either accelerate or prevent speciation processes in domesticated species.Asian cultivated rice is a target crop for both domestication and artificial breeding;it contains two subspecies of indica and japonica,which usually produce sterile inter-subspecific hybrids due to reproductive barriers.In this study,we constructed the evolutionary trajectory of a reproductive isolation system S5,which regulates fertility in indica-japonica hybrids via three adjacent genes,based on the data of 606 accessions including two cultivated and 11 wild rice species.Although hybrid sterility haplotypes at S5 lead to establishment of a killer-protector reproductive barrier,origin of wide-compatibility haplotypes by complex hybridization and recombination provides an opposing force to reproductive isolation and thus prevents speciation during domestication.Analysis in a diallel set of 209 crosses involving 21 parents showed that the wide-compatibility genotypes largely rescued fertility of indica-japonica hybrids,indicating that the wide-compatibility gene would enable gene flow to maintain species coherence.This counteracting system indicates that combined effects of natural evolution and artificial selection may result in reversible processes of speciation in rice,which may also have implications for genetic improvement of rice. | Jiaming Mi Guangwei Li Conghao Xu Jiangyi Yang Huihui Yu Gongwei Wang Xianghua Li Jinghua Xiao Huazhi Song Qifa Zhang Yidan Ouyang | 2020 | Molecular Plant2020，13，4： | 6 |
| 8 | Chemical speciation code CHEMSPEC and its applications显示文摘The adsorption and migration behavior of a radionuclide in geological media heavily depends on its chemical forms in a given chemical environment.In order to predict the temporal and spatial distribution of radionuclides around a disposal site when its canister is damaged,it is necessary to develop coupled chemical speciation-solute transport models and relevant software.For that reason,we wrote a new chemical speciation program CHEMSPEC.In this paper,the principles and structure of CHEMSPEC are briefly described,and the strategy and algorithms that were used in this code are interpreted in some detail,such as the measures adopted to prevent divergence in iteratively solving the mass balance equations,the 'predictor-corrector' algorithm for calculation of the number and quantities of solid species formed,and the alternate use of 'freezing' and 'defreezing' oxidation states in handling of co-existent redox and precipitation equilibria.Four examples are given to illustrate CHEMSPEC's features and capabilities. | WANG XiangYun CHEN Tao LIU ChunLi | 2009 | Science China Chemistry2009，52，11： | 5 |
| 9 | Analyses of genome-scale variation reveal divergence of two Sinalliaria species(Brassicaceae)with continuous but limited gene flow显示文摘Numerous biogeographic studies have suggested that geographic isolations triggered by Quaternary climatic changes could have contributed greatly to the high species diversity of eastern Asia.However,little is known about how speciation proceeded during the evolutionary divergence of sister species in this region.In this study,we examined genomic divergence and investigated the speciation process of the two species in the genus Sinalliaria endemic to eastern China,S.limprichtiana(Pax)X.F.Jin,Y.Y.Zhou&H.W.Zhang and S.grandifolia(Z.X.An)Huan Hu,com.nov.(Basionym:Alliaria grandifolia Z.X.An(Acta Phytotax.Sin.23:396,1985)).We sequenced the transcriptomes of seven and eight S.limprichtiana and S.grandifolia individuals,respectively.Analysis of transcriptome single nucleotide polymorphism data indicated that both species were well-delineated with strong genetic differentiation(mean Fsr=0.31).A total of 4000 genes showed differential expression between the two species.Based on these genome-scale nucleotide variations,we used the allele frequency spectrum for modelinganalysis with fastsimcoal to gain insights into the speciation process.Our results suggested divergence with continuous gene flow between the two species.These findings will add to our knowledge on the origin of species diversity in eastern Asia. | Tian-Jing Wang Da-Fu Ru Dan Zhang Quan-Jun Hu | 2019 | Journal of Systematics and Evolution2019，57，3： | 5 |
| 10 | Metallomics:An integrated biometal science显示文摘Metallomics is an emerging scientific area integrating the research fields related to the understanding of the molecular mechanisms of metal-associated life processes and the entirety of metal and metalloid species within a cell or tissue type. In metallomics,metalloproteins,metalloenzymes and other metal-containing biomolecules in a biological system are referred to as metallomes,similar to genomes and proteomes in genomics and proteomics,respectively. This review discusses the concept of metallomics with a focus on analytical techniques and methods,particularly the so-called hyphenated techniques which combine a high-resolution separation technique (gel electrophoresis/laser ablation,chromatography or capillary electrophoresis) with a highly sensitive detection method such as elemental (inductively coupled plasma,ICP) or molecular (electron spray ionization (ESI) or matrix-assisted laser desorption/ionization (MALDI)) mass spectrometry,or nuclear X-ray fluorescence/absorption spectrometry. The applications of these advanced analytical methods in the identification of metallo-/phospho-/seleno-proteins,probing of relationships between structure and function of metal-loproteins,and study of clinically used metallodrugs will be selectively outlined,along with their advantages and limitations. | GE RuiGuang1,2 & SUN HongZhe1 1 Department of Chemistry and Open Laboratory of Chemical Biology,The University of Hong Kong,Hong Kong,China 2 Laboratory of Integrative Biology,College of Life Sciences,Sun Yat-Sen University,Guangzhou 510006,China | 2009 | Science China Chemistry2009，52，12： | 5 |
| 11 | Speciation, sources, and risk assessment of heavy metals in suburban vegetable garden soil in Xianyang City, Northwest China显示文摘Intensive anthropogenic activities can lead tosoil heavy metal contamination resulting in potential risksto the environment and to human health. To reveal theconcentrations, speciation, sources, pollution level, andecological risk of heavy metals in vegetable garden soil, atotal of 136 soil samples were collected from threevegetable production fields in the suburbs of XianyangCity, Northwest China. These samples were analyzed byinductively coupled plasma- atomic emission spectrometryand atomic fluorescence spectrometry. The results showedthat the mean concentrations of Cd, Co, Cu, Mn, Pb, Zn,and Hg in vegetable garden soil were higher than thecorresponding soil element background values of ShaanxiProvince. The heavy metals studied in vegetable gardensoil were primarily found in the residual fraction,averaging from 31.26% (Pb)to 90.23% (Cr). Consideringthe non-residual fractions, the mobility or potential riskwas in the order of Pb (68.74%)〉 Co (60.54%)〉 Mn(59.28%)〉Cd (53.54%)〉〉Ni (23.36%)〉Zn(22.73%) 〉 Cu (14.93%) 〉 V (11.81%) 〉 Cr (9.78%). Cr,Mn, Ni, V, and As in the studied soil were related to soil-forming parent materials, while Cu, Hg, Zn, Cd, Co, andPb were associated with the application of plastic films,fertilizers, and pesticides, as well as traffic emissions andindustrial fumes. Cr, Ni, V, and As presented lowcontamination levels, whereas Co, Cu, Mn, Pb, and Znlevels were moderate, and Cd and Hg were high.Ecological risk was low for Co, Cr, Cu, Mn, Pb, Zn, andAs, with high risk observed for Cd and Hg. The overallpollution level and ecological risk of these heavy metalswere high. | Lijun WANG Wendong TAO Richard C. SMARDON Xue XU Xinwei LU | 2018 | Frontiers of Earth Science2018，12，2： | 5 |
| 12 | New materials of the steppe mammoth, Mammuthus trogontherii, with discussion on the origin and evolutionary patterns of mammoths显示文摘Recently found materials indicate that the steppe mammoth, Mammuthus trogontherii, survived in northern China into the late Pleistocene. East Asia is the key area of mammoth evolution after the initial radiation of early forms out of Africa and into Eurasia at the beginning of the late Pliocene (c. 3.5–3.0 Ma). M. rumanus, M. meridionalis, M. trogontherii, and M. primige- nius probably formed a continuous and transitional evolutionary lineage within the pan-Eurasian mammoth radiation in East Asia. Each speciation event of the Eurasian mammoths was followed by a rapid and large-scale dispersal event: out of East Asia. Allopatric speciation is the main speciation pattern of Mammuthus. The climatic vacillation was severe and frequent in East Asia from the early part of early Pleistocene (c. 2.6 Ma) onward, which probably brought about successive speciation in East Asia and the subsequent dispersal of the mammoths. | WEI GuangBiao HU SongMei YU KeFu HOU YaMei LI Xin JIN ChangZhu WANG Yuan ZHAO JianXin WANG WenHua | 2010 | Science China Earth Sciences2010，53，7： | 4 |
| 13 | Genomic insights into speciation history and local adaptation of an alpine aspen in the Qinghai–Tibet Plateau and adjacent highlands显示文摘Natural selection serves as an important agent to drive and maintain interspecific divergence.Populus rotundifolia Griff.is an alpine aspen species that mainly occurs in the Qinghai-Tibet Plateau(QTP)and adjacent highlands,whereas its sister species,P.davidiana Dode,is distributed across southwest and central to northeast China in much lower altitude regions.In this study,we collected genome resequencing data of 53 P.rotundifolia and 42 P.davidiana individuals across their natural distribution regions.Our population genomic data suggest that the two species are well delimitated in the allopatric regions,but with hybrid zones in their adjacent region in the eastern QTP.Coalescent simulations suggest that P.rotundifolia diverged from P.davidiana in the middle Pleistocene with following continuous gene flow since divergence.In addition,we found numerous highly diverged genes with outlier signatures that are likely associated with high-altitude adaptation of these alpine aspens.Our finding indicate that Quaternary climatic changes and natural selection have greatly contributed to the origin and distinction maintenance of P.rotundifolia in the QTP. | Jia-Liang Li Lin-Ling Zhong Jing Wang Tao Ma Kang-Shan Mao Lei Zhang | 2021 | Journal of Systematics and Evolution2021，59，6： | 4 |
| 14 | Bioleaching of vanadium from barren stone coal and its effect on the transition of vanadium speciation and mineral phase显示文摘This study determined the optimal conditions required to obtain maximum vanadium extraction and examined the transition of mineral phases and vanadium speciation during the bioleaching process. Parameters including the initial p H value, initial Fe^(2+) concentration, solid load, and inoculum quantity were examined. The results revealed that 48.92 wt% of the vanadium was extracted through bioleaching under optimal conditions. Comparatively, the chemical leaching yield(H_2SO_4, pH 2.0) showed a slower and milder increase in vanadium yield. The vanadium bioleaching yield was 35.11 wt% greater than the chemical leaching yield. The Community Bureau of Reference(BCR) sequential extraction results revealed that 88.62 wt% of vanadium existed in the residual fraction. The bacteria substantially changed the distribution of the vanadium speciation during the leaching process, and the residual fraction decreased to 48.44 wt%. The X-ray diffraction(XRD) and Fourier transform infrared(FTIR) results provided evidence that the crystal lattice structure of muscovite was destroyed by the bacteria. | Xin Wang Hai Lin Ying-bo Dong Gan-yu Li | 2018 | International Journal of Minerals,Metallurgy and Materials2018，25，3： | 3 |
| 15 | Characterization and coagulation performance of polymeric phosphate ferric sulfate on eutrophic water显示文摘Polymeric phosphate ferric sulfate (PPFS),a new improved coagulation reagent,was prepared by polymeric ferric sulfate (PFS),Na2HPO4 and NaOH. The degree of iron polymerisation (Fepol) of PPFS was determined by means of the ferron-timed spectroscopy method. Furthermore,the effect of n(P)/n(Fe),alkalization degree,pH value,and PPFS dosage on the removal rate of eutrophic water turbidity and chl-a and ζ-potential of products were also investigated. The experimental results show that the best n(P)/n(Fe) of flocculation effect in stable product of PFFS is 0.3; the best alkalization degree of flocculation effect is 0.2,while the n(P)/n(Fe) is 0.3. Under the neutral and subalkalic (pH value is 7-8) conditions,PPFS achieves the best processing efficiency. PPFS has more excellent turbidity and higher chlorophyl removal rate by studying treatment eutrophic water in comparison with PFS. | 焦世珺 郑怀礼 陈容 邓小莉 邓琳莉 吉方英 | 2009 | Journal of Central South University2009，16，S1： | 3 |
| 16 | Pan-genome of Raphanus highlights genetic variation and introgression among domesticated,wild,and weedy radishes显示文摘Post-polyploid diploidization associated with descending dysploidy and interspecific introgression drives plant genome evolution by unclear mechanisms.Raphanus is an economically and ecologically important Brassiceae genus and model system for studying post-polyploidization genome evolution and introgres-sion.Here,we report the de novo sequence assemblies for 11 genomes covering most of the typical sub-species and varieties of domesticated,wild and weedy radishes from East Asia,South Asia,Europe,and America.Divergence among the species,sub-species,and South/East Asian types coincided with Quaternary glaciations.A genus-level pan-genome was constructed with family-based,locus-based,and graph-based methods,and whole-genome comparisons revealed genetic variations ranging from single-nucleotide polymorphisms(SNPs)to inversions and translocations of whole ancestral karyotype(AK)blocks.Extensive gene flow occurred between wild,weedy,and domesticated radishes.High fre-quencies of genome reshuffling,biased retention,and large-fragment translocation have shaped the genomic diversity.Most variety-specific gene-rich blocks showed large structural variations.Extensive translocation and tandem duplication of dispensable genes were revealed in two large rearrangement-rich islands.Disease resistance genes mostly resided on specific and dispensable loci.Variations causing the loss of function of enzymes modulating gibberellin deactivation were identified and could play an important role in phenotype divergence and adaptive evolution.This study provides new insights into the genomic evolution underlying post-polyploid diploidization and lays the foundation for genetic improve-ment of radish crops,biological control of weeds,and protection of wild species'germplasms. | Xiaohui Zhang Tongjin Liu Jinglei Wang Peng Wang Yang Qiu Wei Zhao Shuai Pang Xiaoman Li Haiping Wang Jiangping Song Wenlin Zhang Wenlong Yang Yuyan Sun Xixiang Li | 2021 | Molecular Plant2021，14，12： | 3 |
| 17 | Insights into the genus Diaporthe:phylogenetic species delimitation in the D.eres species complex显示文摘The genus Diaporthe comprises pathogenic,endophytic and saprobic species with both temperate and tropical distributions.Cryptic diversification,phenotypic plasticity and extensive host associations have long complicated accurate identifications of species in this genus.The delimitation of the generic type species Diaporthe eres has been uncertain due to the lack of ex-type cultures.Species limits of D.eres and closely related species were evaluated using molecular phylogenetic analysis of eight genes including nuclear ribosomal internal transcribed spacer(ITS),partial sequences of actin(ACT),DNA-lyase(Apn2),translation elongation factor 1-α(EF1-α),beta-tubulin(TUB),calmodulin(CAL),60s ribosomal protein L37(FG1093)and histone-3(HIS).The occurrence of sequence heterogeneity of ITS within D.eres is observed,which complicates the analysis and may lead to overestimation of the species diversity.The strict criteria of Genealogical Concordance Phylogenetic Species Recognition(GCPSR)were applied to resolve species boundaries based on individual and combined analyses of other seven genes except the ITS.We accept nine distinct phylogenetic species including Diaporthe alleghaniensis,D.alnea,D.bicincta,D.celastrina,D.eres,D.helicis,D.neilliae,D.pulla and D.vaccinii.Epitypes are designated for D.alnea,D.bicincta,D.celastrina,D.eres,D.helicis and D.pulla.Modern descriptions and illustrations are provided for these species.Newly designed primers are introduced to amplify and sequence the Apn2(DNA-lyase)gene in Diaporthe.Based on phylogenetic informativeness profiles,EF1-α,Apn2 and HIS genes are recognised as the best markers for defining species in the D.eres complex. | Dhanushka Udayanga Lisa A.Castlebury Amy Y.Rossman Ekachai Chukeatirote Kevin D.Hyde | 2014 | Fungal Diversity2014，，4： | 3 |
| 18 | Genes and speciation: is it time to abandon the biological species concept?显示文摘The biological species concept(BSC)is the cornerstone of neo-Darwinian thinking.In BSC,species do not exchange genes e让her during or after speciation.However,as gene flow during speciation is increasingly being reported in a substantial literature,让seems time to reassess the revered;but often doubted;BSC.Contrary to the common perception;BSC should expect substantial gene flow at the onset of speciation,not least because geographical isolation develops gradually.Although BSC does not stipulate how speciation begins,it does require a sustained period of isolation for speciation to complete its course.Evidence against BSC must demonstrate that the observed gene flow does not merely occur at the onset of speciation but continues until its completion.Importantly^recent genomic analyses cannot reject this more realistic version of BSC;although future analyses may still prove让wrong.The ultimate acceptance or rejection of BSC is not merely about a historical debate;rather,it is about the fundamental nature of species-are species(and,hence;divergent adaptations)driven by a relatively small number of genes,or by thousands of them?Many levels ofbiology,ranging from taxonomy to biodiversity;depend on this resolution. | Xinfeng Wang Ziwen He Suhua Shi Chung-I Wu | 2020 | National Science Review2020，7，8： | 3 |
| 19 | Population genetics and evolutionary history of Miscanthus species in China显示文摘Miscanthus species have received considerable attention as a potential biomass source for renewable energy production because of their ability to produce high yields of biomass and adapt to a wide range of climates and soils. To explore the genetic diversity and phylogenetic relationship of Miscanthus species in China, we used 24 simple sequence repeat markers to genotype 100 natural populations representing all four Chinese Miscanthus species (M. sinensis Andersson, M. floridulus (Lab.) Warb. ex K. Schum.& Lauterb., M. sacchariflorus (Maxim.) Hack., and M. lutarioriparius L. Liu ex Renvoize & S. L. Chen). Based on phylogenetic, principal coordinate, and STRUCTURE analyses, we found that the 100 populations formed two major groups corresponding to sect. Triarrhena and sect. Miscanthus. Group 1 (i.e., sect. Triarrhena) was further subdivided into two subgroups corresponding to M. sacchariflorus and M. lutarioriparius;Group 2 (i.e., sect. Miscanthus) was subdivided into three subgroups, group 2a (M. sinensis populations in southern China), group 2b (M. sinensis populations in northern China), and group 2c (all the M. floridulus populations). Population genetics analyses indicated high levels of the genetic diversity at both population (HE = 0.468–0.599) and species (HE = 0.559–0.708) levels, indicative of the potential of these wild resources in future breeding programs. The species distribution modeling showed that M. sacchariflorus and M. lutarioriparius have experienced population reductions during the last glacial maximum and population expansion afterward;in contrast, M. sinensis and M. floridulus both underwent gradual population expansions from the last interglaciation to the present. We also suggest that M. floridulus originated from M. sinensis in southeast China through ecological speciation. The understanding of the evolutionary history and population dynamics of these species not only provides valuable information for further genetic improvement and breeding of this energy crop but also gives important insights into the origin and speciation processes of the Miscanthus species. | Shan-Shan Li Hai-Fei Zhou Wen-Li Chen Juan Yan Zhe Cai Ruo-Xun Wei Chih-Hui Chen Bin Han Jian-Qiang Li Tao Sang Song Ge | 2019 | Journal of Systematics and Evolution2019，57，5： | 2 |
| 20 | Arsenobetaine:the ongoing mystery显示文摘Arsenobetaine(As B) is a non-toxic organoarsenical identiied as a major arsenic species in marine animals and a number of terrestrial mushrooms.Since its irst identiication nearly 40 years ago,numerous studies investigating the biosynthesis and function of As B have been carried out,although molecular mechanisms have not been fully elucidated.Where and how is As B formed? Why do marine animals acquire high concentrations of As B? his review briely summarizes the current progress of As B research toward understanding its origin,function and the putative pathways for its biosynthesis.his paper also suggests potential future studies in the atempt to solve the As B mystery. | Aleksandra Popowich Qi Zhang X.Chris Le | 2016 | National Science Review2016，3，4： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员