期刊文献+
共找到21篇文章
< 1 2 >
每页显示 20 50 100
A Study of English Translation Strategies of Subtitles of the Domestic Animated Film Chang’an from the Perspective of Eco-translatology
1
作者 LIU Ya-ru 《Journal of Literature and Art Studies》 2024年第3期220-225,共6页
This article conducts an analysis and exploration of the English subtitles translation of the domestic animated film Chang’an from the perspective of eco-translatology.Taking three-dimensional transformation as the e... This article conducts an analysis and exploration of the English subtitles translation of the domestic animated film Chang’an from the perspective of eco-translatology.Taking three-dimensional transformation as the entry point,it analyzes the adaptation and selection of subtitle translators in the translation process from the dimensions of language,culture,and communication in Chang’an,aiming to enrich the practical analysis of eco-translatology and provide valuable insights and references for the theoretical construction and practical application of eco-translatology.This article enriches the practical analysis of eco-translatology and also validates to a certain extent the applicability of“three-dimensional”transformation. 展开更多
关键词 subtitle translation ECO-TRANSLATOLOGY Chang’an three-dimensional transformation translation as adaptation and selection
下载PDF
A Bintree Energy Approach for Colour Image Segmentation Using Adaptive Channel Selection
2
作者 涂圣贤 张素 +2 位作者 陈亚珠 肖昌炎 张磊 《Journal of Shanghai Jiaotong university(Science)》 EI 2008年第1期52-59,共8页
A new hierarchical approach called bintree energy segmentation was presented for color image segmentation. The image features are extracted by adaptive clustering on multi-channel data at each level and used as the cr... A new hierarchical approach called bintree energy segmentation was presented for color image segmentation. The image features are extracted by adaptive clustering on multi-channel data at each level and used as the criteria to dynamically select the best chromatic channel, where the segmentation is carried out. In this approach, an extended direct energy computation method based on the Chan-Vese model was proposed to segment the selected channel, and the segmentation outputs are then fused with other channels into new images, from which a new channel with better features is selected for the second round segmentation. This procedure is repeated until the preset condition is met. Finally, a binary segmentation tree is formed, in which each leaf represents a class of objects with a distinctive color. To facilitate the data organization, image background is employed in segmentation and channels fusion. The bintree energy segmentation exploits color information involved in all channels data and tries to optimize the global segmentation result by choosing the 'best' channel for segmentation at each level. The experiments show that the method is effective in speed, accuracy and flexibility. 展开更多
关键词 active contour adaptive channel selection bintree energy segmentation color image
下载PDF
Adaptive Neighboring Selection Algorithm Based on Curvature Prediction in Manifold Learning
3
作者 Lin Ma Cai-Fa Zhou +1 位作者 Xi Liu Yu-Bin Xu 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2013年第3期119-123,共5页
Recently manifold learning algorithm for dimensionality reduction attracts more and more interests, and various linear and nonlinear,global and local algorithms are proposed. The key step of manifold learning algorith... Recently manifold learning algorithm for dimensionality reduction attracts more and more interests, and various linear and nonlinear,global and local algorithms are proposed. The key step of manifold learning algorithm is the neighboring region selection. However,so far for the references we know,few of which propose a generally accepted algorithm to well select the neighboring region. So in this paper,we propose an adaptive neighboring selection algorithm,which successfully applies the LLE and ISOMAP algorithms in the test. It is an algorithm that can find the optimal K nearest neighbors of the data points on the manifold. And the theoretical basis of the algorithm is the approximated curvature of the data point on the manifold. Based on Riemann Geometry,Jacob matrix is a proper mathematical concept to predict the approximated curvature. By verifying the proposed algorithm on embedding Swiss roll from R3 to R2 based on LLE and ISOMAP algorithm,the simulation results show that the proposed adaptive neighboring selection algorithm is feasible and able to find the optimal value of K,making the residual variance relatively small and better visualization of the results. By quantitative analysis,the embedding quality measured by residual variance is increased 45. 45% after using the proposed algorithm in LLE. 展开更多
关键词 manifold learning curvature prediction adaptive neighboring selection residual variance
下载PDF
Metaheuristic Based Noise Identification and Image Denoising Using Adaptive Block Selection Based Filtering
4
作者 M. Sasikala Devi R. Sukumar 《Circuits and Systems》 2016年第9期2729-2751,共24页
Image denoising has become one of the major forms of image enhancement methods that form the basis of image processing. Due to the inconsistencies in the machinery producing these signals, medical images tend to requi... Image denoising has become one of the major forms of image enhancement methods that form the basis of image processing. Due to the inconsistencies in the machinery producing these signals, medical images tend to require these techniques. In real time, images do not contain a single noise, and instead they contain multiple types of noise distributions in several indistinct regions. This paper presents an image denoising method that uses Metaheuristics to perform noise identification. Adaptive block selection is used to identify and correct the noise contained in these blocks. Though the system uses a block selection scheme, modifications are performed on pixel- to-pixel basis and not on the entire blocks;hence the image accuracy is preserved. PSO is used to identify the noise distribution, and appropriate noise correction techniques are applied to denoise the images. Experiments were conducted using salt and pepper noise, Gaussian noise and a combination of both the noise in the same image. It was observed that the proposed method performed effectively on noise levels up-to 0.5 and was able to produce results with PSNR values ranging from 20 to 30 in most of the cases. Excellent reduction rates were observed on salt and pepper noise and moderate reduction rates were observed on Gaussian noise. Experimental results show that our proposed system has a wide range of applicability in any domain specific image denoising scenario, such as medical imaging, mammogram etc. 展开更多
关键词 Adaptive Block selection Enhancement Filtering Image Denoising Noise Identification Particle Swarm Optimization
下载PDF
Adaptive Energy-Efficient Power Allocation for DAS with Imperfect Channel State Information and Antenna Selection
5
作者 Weiye Xu Min Lin +1 位作者 Yu Yang Xiangbin Yu 《China Communications》 SCIE CSCD 2016年第7期127-134,共8页
Considering that perfect channel state information(CSI) is difficult to obtain in practice,energy efficiency(EE) for distributed antenna systems(DAS) based on imperfect CSI and antennas selection is investigated in Ra... Considering that perfect channel state information(CSI) is difficult to obtain in practice,energy efficiency(EE) for distributed antenna systems(DAS) based on imperfect CSI and antennas selection is investigated in Rayleigh fading channel.A novel EE that is defined as the average transmission rate divided by the total consumed power is introduced.In accordance with this definition,an adaptive power allocation(PA) scheme for DAS is proposed to maximize the EE under the maximum transmit power constraint.The solution of PA in the constrained EE optimization does exist and is unique.A practical iterative algorithm with Newton method is presented to obtain the solution of PA.The proposed scheme includes the one under perfect CSI as a special case,and it only needs large scale and statistical information.As a result,the scheme has low overhead and good robustness.The theoretical EE is also derived for performance evaluation,and simulation result shows the validity of the theoretical analysis.Moreover,EE can be enhanced by decreasing the estimation error and/or path loss exponents. 展开更多
关键词 distributed antenna system energy efficiency adaptive power allocation imperfect channel state information antenna selection
下载PDF
An adaptive waveform-detection threshold joint optimization method for target tracking 被引量:5
6
作者 王宏强 夏洪恩 +1 位作者 程永强 王璐璐 《Journal of Central South University》 SCIE EI CAS 2013年第11期3057-3064,共8页
The joint optimization of detection threshold and waveform parameters for target tracking which comes from the idea of cognitive radar is investigated for the modified probabilistic data association(MPDA)filter.The tr... The joint optimization of detection threshold and waveform parameters for target tracking which comes from the idea of cognitive radar is investigated for the modified probabilistic data association(MPDA)filter.The transmitted waveforms and detection threshold are adaptively selected to enhance the tracking performance.The modified Riccati equation is adopted to predict the error covariance which is used as the criterion function,while the optimization problem is solved through the genetic algorithm(GA).The detection probability,false alarm probability and measurement noise covariance are all considered together,which significantly improves the tracking performance of the joint detection and tracking system.Simulation results show that the proposed adaptive waveform-detection threshold joint optimization method outperforms the adaptive threshold method and the fixed parameters method,which will reduce the tracking error.The average reduction of range error between the adaptive joint method and the fixed parameters method is about 0.6 m,while that between the adaptive joint method and the adaptive threshold only method is about 0.3 m.Similar error reduction occurs for the velocity error and acceleration error. 展开更多
关键词 cognitive radar adaptive waveform selection target tracking joint optimization detection-tracking system
下载PDF
Solving Multitrip Pickup and Delivery Problem With Time Windows and Manpower Planning Using Multiobjective Algorithms 被引量:6
7
作者 Jiahai Wang Yuyan Sun +1 位作者 Zizhen Zhang Shangce Gao 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2020年第4期1134-1153,共20页
The multitrip pickup and delivery problem with time windows and manpower planning(MTPDPTW-MP)determines a set of ambulance routes and finds staff assignment for a hospital. It involves different stakeholders with dive... The multitrip pickup and delivery problem with time windows and manpower planning(MTPDPTW-MP)determines a set of ambulance routes and finds staff assignment for a hospital. It involves different stakeholders with diverse interests and objectives. This study firstly introduces a multiobjective MTPDPTW-MP(MO-MTPDPTWMP) with three objectives to better describe the real-world scenario. A multiobjective iterated local search algorithm with adaptive neighborhood selection(MOILS-ANS) is proposed to solve the problem. MOILS-ANS can generate a diverse set of alternative solutions for decision makers to meet their requirements. To better explore the search space, problem-specific neighborhood structures and an adaptive neighborhood selection strategy are carefully designed in MOILS-ANS. Experimental results show that the proposed MOILS-ANS significantly outperforms the other two multiobjective algorithms. Besides, the nature of objective functions and the properties of the problem are analyzed. Finally, the proposed MOILS-ANS is compared with the previous single-objective algorithm and the benefits of multiobjective optimization are discussed. 展开更多
关键词 Adaptive neighborhood selection manpower planning multiobjective optimization multitrip pickup and delivery problem with time windows
下载PDF
Application of Bit Error Rate Information Based on Weighted Error Estimating Code 被引量:1
8
作者 Liu Yu Li Qing +1 位作者 Li Bin Zhang Lin 《China Communications》 SCIE CSCD 2012年第6期82-90,共9页
Error Estimating Code (EEC) is a new channel coding method to estimate the Bit Error Rate (BER) information of the transmitted sequence. However, the estimated BER is not precise enough if the practical value of BER i... Error Estimating Code (EEC) is a new channel coding method to estimate the Bit Error Rate (BER) information of the transmitted sequence. However, the estimated BER is not precise enough if the practical value of BER is high. A weighted EEC estimation method is proposed to improve the accuracy performance of BER estimation by classifying the raw estimation results into intervals and multiplying them by different coefficients separately. The applications of weighted EEC in modulation selection scheme and distributed video coding are discussed. Simulation results show that the EEC-based modulation selection method can achieve better performance at a cost of little redundancy and computation, and the EEC-based rate estimation method in distributed video coding can save the decoding time. 展开更多
关键词 channel coding BER estimation errorestimating code adaptive modulation selection distributed video coding
下载PDF
Mark Bender’s Translation and Introduction of Plants and Animals in The Nuosu Book of Origins
9
作者 LIU Junli 《Journal of Philosophy Study》 2022年第5期280-286,共7页
Mark Bender and Aku Wuwu translate Hnewo Teyy,a crucial epic for Nuosu people from Yi to English directly and entirely for the first time.Their translation and introduction of the epic are involved in The Nuosu Book o... Mark Bender and Aku Wuwu translate Hnewo Teyy,a crucial epic for Nuosu people from Yi to English directly and entirely for the first time.Their translation and introduction of the epic are involved in The Nuosu Book of Origins,in which Bender concerns plants and animals.This paper mainly analyses Bender’s adaptation and selection concerning his investigation and translation of plants and animals under the guidance of Eco-translatology.Significantly,Eco-translatology and Bender’s translation and introduction provide enlightenment to the transmission of Chinese culture. 展开更多
关键词 The Nuosu Book of Origins ECO-TRANSLATOLOGY adaptation and selection Chinese culture
下载PDF
On Subtitle Translation of Game of Thrones from the Perspective of Eco-translatology
10
作者 李潮 《海外英语》 2017年第8期131-133,140,共4页
HBO TV series–Game of Thrones has gone viral ever since its first release in 2011 and its soaring popularity among Chineseaudience has no doubt benefited from the"appropriate"E-C subtitles attached to it. T... HBO TV series–Game of Thrones has gone viral ever since its first release in 2011 and its soaring popularity among Chineseaudience has no doubt benefited from the"appropriate"E-C subtitles attached to it. This paper, through the analysis and discussion ofthe E-C subtitles of Game of Thrones from the perspective of Eco-translatology, demonstrates that the approach of Translation as Adap-tation and Selection(TAS) proves to be operational in subtitle translation, and gives further recommendations in the communicativetransformation of subtitle translation. 展开更多
关键词 ECO-TRANSLATOLOGY translation as adaptation and selection subtitle translation Game of Thrones YYeTs COM
下载PDF
On Translation of Figure of Speech in Fortress Besieged From the Perspective of Eco-translatology
11
作者 黄栋勇 《海外英语》 2016年第21期153-154,共2页
On the framework of eco- translatology, this thesis presents an introduction of the novel Fortress Besieged, the author and the translation work, and then gives an analysis of the translator's adaptation and selec... On the framework of eco- translatology, this thesis presents an introduction of the novel Fortress Besieged, the author and the translation work, and then gives an analysis of the translator's adaptation and selection of the translational eco-environment. 展开更多
关键词 Fortress Besieged figure of speech ECO-TRANSLATOLOGY adaptation and selection
下载PDF
An Eco-translatological Perspective to Researching Publicity Texts Translation
12
作者 翁靖华 毕雪飞 《海外英语》 2018年第5期149-150,共2页
The importance of an interdisciplinary investigation into the translation of publicity texts cannot be overestimated at a time when the role of international communication grows rapidly,which in turn pushes the develo... The importance of an interdisciplinary investigation into the translation of publicity texts cannot be overestimated at a time when the role of international communication grows rapidly,which in turn pushes the development of globalization.Ecotranslatology takes the concept of"adaptation/selection"of Darwin’s Evolution Theory as its theoretical foundation,focusing on the integrity of the translation ecosystem,making a novel description and interpretation to the nature,process,standard,principles,methods of translation and translation phenomena from the perspective of Eco-translatology.Though the construct of the theory keeps expanding,there is still a lack of systematic discussion on translation activities with focus on the integrity and harmony in Eco-translatology.This study therefore aims to promote the need of researching publicity text translation from an Ecotranslatological perspective through the review of the existing literature in this field. 展开更多
关键词 publicity text translation ECO-TRANSLATOLOGY interdisciplinary research adaptation/selection
下载PDF
Learning to select the recombination operator for derivative-free optimization 被引量:1
13
作者 Haotian Zhang Jianyong Sun +1 位作者 Thomas Back Zongben Xu 《Science China Mathematics》 SCIE CSCD 2024年第6期1457-1480,共24页
Extensive studies on selecting recombination operators adaptively,namely,adaptive operator selection(AOS),during the search process of an evolutionary algorithm(EA),have shown that AOS is promising for improving EA... Extensive studies on selecting recombination operators adaptively,namely,adaptive operator selection(AOS),during the search process of an evolutionary algorithm(EA),have shown that AOS is promising for improving EA's performance.A variety of heuristic mechanisms for AOS have been proposed in recent decades,which usually contain two main components:the feature extraction and the policy setting.The feature extraction refers to as extracting relevant features from the information collected during the search process.The policy setting means to set a strategy(or policy)on how to select an operator from a pool of operators based on the extracted feature.Both components are designed by hand in existing studies,which may not be efficient for adapting optimization problems.In this paper,a generalized framework is proposed for learning the components of AOS for one of the main streams of EAs,namely,differential evolution(DE).In the framework,the feature extraction is parameterized as a deep neural network(DNN),while a Dirichlet distribution is considered to be the policy.A reinforcement learning method,named policy gradient,is used to train the DNN.As case studies,the proposed framework is applied to two DEs including the classic DE and a recently-proposed DE,which result in two new algorithms named PG-DE and PG-MPEDE,respectively.Experiments on the Congress of Evolutionary Computation(CEC)2018 test suite show that the proposed new algorithms perform significantly better than their counterparts.Finally,we prove theoretically that the considered classic methods are the special cases of the proposed framework. 展开更多
关键词 evolutionary algorithm differential evolution adaptive operator selection reinforcement learning deep learning
原文传递
Adaptive IF selection and IQ mismatch compensation in a low-IF GSM receiver 被引量:1
14
作者 张成 王丽芳 +1 位作者 谈熙 闵昊 《Journal of Semiconductors》 EI CAS CSCD 2012年第6期71-78,共8页
This paper presents an algorithm that can adaptively select the intermediate frequency(IF) and compensate the IQ mismatch according to the power ratio of the adjacent channel interference to the desired signal in a ... This paper presents an algorithm that can adaptively select the intermediate frequency(IF) and compensate the IQ mismatch according to the power ratio of the adjacent channel interference to the desired signal in a low-IF GSM receiver.The IF can be adaptively selected between 100 and 130 kHz.Test result shows an improvement of phase error from 6.78°to 3.23°.Also a least mean squares(LMS) based IQ mismatch compensation algorithm is applied to improve image rejection ratio(IRR) for the desired signal along with strong adjacent channel interference.The IRR is improved from 29.1 to 44.3 dB in measurement.The design is verified in a low-IF GSM receiver fabricated in SMIC 0.13μm RF CMOS process with a working voltage of 1.2 V. 展开更多
关键词 low-IF adaptive selection phase error IRR LMS algorithm power ratio
原文传递
Kernel Quantile Estimator with ICI Adaptive Bandwidth Selection Technique
15
作者 Jie Yu FAN Man Lai TANG Mao Zai TIAN 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2014年第4期710-722,共13页
In this article, we consider a class of kernel quantile estimators which is the linear combi- nation of order statistics. This class of kernel quantile estimators can be regarded as an extension of some existing estim... In this article, we consider a class of kernel quantile estimators which is the linear combi- nation of order statistics. This class of kernel quantile estimators can be regarded as an extension of some existing estimators. The exact mean square error expression for this class of estimators will be provided when data are uniformly distributed. The implementation of these estimators depends mostly on the bandwidth selection. We then develop an adaptive method for bandwidth selection based on the intersection confidence intervals (ICI) principle. Monte Carlo studies demonstrate that our proposed approach is comparatively remarkable. We illustrate our method with a real data set. 展开更多
关键词 Adaptive bandwidth selection ICI principle kernel estimator QUANTILES
原文传递
Fast Adaptive Wavelet for Remote Sensing Image Compression 被引量:4
16
作者 李波 焦润海 李元诚 《Journal of Computer Science & Technology》 SCIE EI CSCD 2007年第5期770-778,共9页
Remote sensing images are hard to achieve high compression ratio because of their rich texture. By analyzing the influence of wavelet properties on image compression, this paper proposes wavelet construction rules and... Remote sensing images are hard to achieve high compression ratio because of their rich texture. By analyzing the influence of wavelet properties on image compression, this paper proposes wavelet construction rules and builds a new biorthogonal wavelet construction model with parameters. The model parameters are optimized by using genetic algorithm and adopting energy compaction as the optimization object function. In addition, in order to resolve the computation complexity problem of online construction, according to the image classification rule proposed in this paper we construct wavelets for different classes of images and implement the fast adaptive wavelet selection algorithm (FAWS). Experimental results show wavelet bases of FAWS gain better compression performance than Daubechies9/7. 展开更多
关键词 wavelet construction remote sensing image image compression energy compaction image classification fast adaptive wavelet selection
原文传递
Genomic insights into the origin, adaptive evolution, and herbicide resistance of Leptochloa chinensis, a devastating tetraploid weedy grass in rice fields 被引量:2
17
作者 Lifeng Wang Xuepeng Sun +13 位作者 Yajun Peng Ke Chen Shan Wu Yanan Guo Jingyuan Zhang Haona Yang Tao Jin Lamei Wu Xiaomao Zhou Bin Liang Zhenghong Zhao Ducai Liu Zhangjun Fei Lianyang Bai 《Molecular Plant》 SCIE CAS CSCD 2022年第6期1045-1058,共14页
Chinese sprangletop (Leptochloa chinensis), belonging to the grass subfamily Chloridoideae, is one of the most notorious weeds in rice ecosystems. Here, we report a chromosome-scale reference genome assembly and a gen... Chinese sprangletop (Leptochloa chinensis), belonging to the grass subfamily Chloridoideae, is one of the most notorious weeds in rice ecosystems. Here, we report a chromosome-scale reference genome assembly and a genomic variation map of the tetraploid L. chinensis. The L. chinensis genome is derived from two diploid progenitors that diverged ∼10.9 million years ago, and its two subgenomes display neither fractionation bias nor overall gene expression dominance. Comparative genomic analyses reveal substantial genome rearrangements in L. chinensis after its divergence from the common ancestor of Chloridoideae and, together with transcriptome profiling, demonstrate the important contribution of tetraploidization to the gene sources for the herbicide resistance of L. chinensis. Population genomic analyses of 89 accessions from China reveal that L. chinensis accessions collected from southern/southwestern provinces have substantially higher nucleotide diversity than those from the middle and lower reaches of the Yangtze River, suggesting that L. chinensis spread in China from the southern/southwestern provinces to the middle and lower reaches of the Yangtze River. During this spread, L. chinensis developed significantly increased herbicide resistance, accompanied by the selection of numerous genes involved in herbicide resistance. Taken together, our study generated valuable genomic resources for future fundamental research and agricultural management of L. chinensis, and provides significant new insights into the herbicide resistance as well as the origin and adaptive evolution of L. chinensis. 展开更多
关键词 Leptochloa weed sgenome polyploidization genome evolution genetic diversity adaptive selection herbicide resistance
原文传递
Unsupervised Nonlinear Adaptive Manifold Learning for Global and Local Information 被引量:4
18
作者 Jiajun Gao Fanzhang Li +1 位作者 Bangjun Wang Helan Liang 《Tsinghua Science and Technology》 SCIE EI CAS CSCD 2021年第2期163-171,共9页
In this paper,we propose an Unsupervised Nonlinear Adaptive Manifold Learning method(UNAML)that considers both global and local information.In this approach,we apply unlabeled training samples to study nonlinear manif... In this paper,we propose an Unsupervised Nonlinear Adaptive Manifold Learning method(UNAML)that considers both global and local information.In this approach,we apply unlabeled training samples to study nonlinear manifold features,while considering global pairwise distances and maintaining local topology structure.Our method aims at minimizing global pairwise data distance errors as well as local structural errors.In order to enable our UNAML to be more efficient and to extract manifold features from the external source of new data,we add a feature approximate error that can be used to learn a linear extractor.Also,we add a feature approximate error that can be used to learn a linear extractor.In addition,we use a method of adaptive neighbor selection to calculate local structural errors.This paper uses the kernel matrix method to optimize the original algorithm.Our algorithm proves to be more effective when compared with the experimental results of other feature extraction methods on real face-data sets and object data sets. 展开更多
关键词 unsupervised manifold learning global and local information adaptive neighbor selection method kernel matrix
原文传递
A Two-Level Detection Algorithm for Optical Fiber Vibration 被引量:2
19
作者 Fukun BI Xuecong REN Hongquan QU Ruiqing JIANG 《Photonic Sensors》 SCIE EI CAS CSCD 2015年第3期284-288,共5页
Optical fiber vibration is detected by the coherent optical time domain reflection technique. In addition to the vibration signals, the reflected signals include clutters and noises, which lead to a high false alarm r... Optical fiber vibration is detected by the coherent optical time domain reflection technique. In addition to the vibration signals, the reflected signals include clutters and noises, which lead to a high false alarm rate. The "cell averaging" constant false alarm rate algorithm has a high computing speed, but its detection performance will be declined in nonhomogeneous environments such as multiple targets. The "order statistics" constant false alarm rate algorithm has a distinct advantage in multiple target environments, but it has a lower computing speed. An intelligent two-level detection algorithm is presented based on "cell averaging" constant false alarm rate and "order statistics" constant false alarm rate which work in serial way, and the detection speed of "cell averaging" constant false alarm rate and performance of "order statistics" constant false alarm rate are conserved, respectively. Through the adaptive selection, the "cell averaging" is applied in homogeneous environments, and the two-level detection algorithm is employed in nonhomogeneous environments. Our Monte Carlo simulation results demonstrate that considering different signal noise ratios, the proposed algorithm gives better detection probability than that of "order statistics". 展开更多
关键词 Optical fiber vibration the adaptive selection Monte Carlo simulation two-level detection
原文传递
Population transcriptomics reveals a potentially positive role of expression diversity in adaptation 被引量:2
20
作者 Qin Xu Shilai Xing +12 位作者 Caiyun Zhu Wei Liu Yangyang Fan Qian Wang Zhihong Song Wenhui Yang Fan Luo Fei Shang Lifang Kang Wenli Chen Juan Yan Jianqiang Li Tao Sang 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2015年第3期284-299,共16页
While it is widely accepted that genetic diversity determines the potential of adaptation,the role that gene expression variation plays in adaptation remains poorly known.Here we show that gene expression diversity co... While it is widely accepted that genetic diversity determines the potential of adaptation,the role that gene expression variation plays in adaptation remains poorly known.Here we show that gene expression diversity could have played a positive role in the adaptation of Miscanthus lutarioriparius.RNA-seq was conducted for 80 individuals of the species,with half planted in the energy crop domestication site and the other half planted in the control site near native habitats.A leaf reference transcriptome consisting of 18,503 high-quality transcripts was obtained using a pipeline developed for de novo assembling with population RNA-seq data.The population structure and genetic diversity of M.lutarioriparius were estimated based on 30,609 genic single nucleotide polymorphisms.Population expression(Ep) and expression diversity(Ed)were defined to measure the average level and the magnitude of variation of a gene expression in the population,respectively.It was found that expression diversity increased while genetic Resediversity decreased after the species was transplanted from the native habitats to the harsh domestication site,especially for genes involved in abiotic stress resistance,histone methylation,and biomass synthesis under water limitation.The increased expression diversity could have enriched phenotypic variation directly subject to selections in the new environment. 展开更多
关键词 Adaptation artificial selection de novo assembling expression variation genetic diversity Miscanthus lutarioriparius population transcriptome
原文传递
上一页 1 2 下一页 到第
使用帮助 返回顶部