检索结果-南通市图书馆

Acquisition of deleterious mutations duringpotato polyploidization

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2019年第1期61卷 7-11页

作者： Qun Lian die tang Zhiyan Bai Jianjian Qi Fei Lu Sanwen Huang Chunzhi Zhang Genome Analysis Laboratory of the Ministry of Agriculture Agricultural Genomics InstitutetheChinese Academy of Agricultural Sciences Inner Mongolia Potato Engineering and Technology Research Centre Inner Mongolia University The State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental Biologythe Chinese Academy of Sciences CAS-JIC Centre of Excellence for Plant and Microbial Science(CEPAMS) Shanghai Institutes for Biological Sciencesthe Chinese Academy of Sciences

Potatoes(Solanum tuberosum L.) represent an important tuber crop, worldwide. During its prolonged clonal propagation, numerous deleterious mutations have accumulated in the potato genome,leading to severe inbreeding depression; however,the shaping of this mutation burden during polyploidization and improvement is largely ***, we sequenced 20 diploid landraces of the Stenotomum group, eight tetraploid landraces, and 20 tetraploid modern cultivars, to analyze variations in their deleterious mutations. We show that deleterious mutations accumulated rapidly during the polyploidization of tetraploid potatoes. This study provides a foundation for future potato improvement.

关键词： Potatoes study

Data augmentation for bias correction in mapping PM_(2.5) based on satellite retrievals and ground observations

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2024年第1期15卷 17-28页

作者： Tan Mi die tang Jianbo Fu Wen Zeng Michael L.Grieneisen Zihang Zhou Fengju Jia Fumo Yang Yu Zhan College of Carbon Neutrality Future Technology Sichuan UniversityChengduSichuan 610065China Department of Environmental Science and Engineering Sichuan UniversityChengduSichuan 610065China Institute for Disaster Management and Reconstruction Sichuan UniversityChengduSichuan 610200China Department of Land Airand Water ResourcesUniversity of CaliforniaDavisCA 95616United States Chengdu Academy of Environmental Sciences ChengduSichuan 610072China Sichuan Chengdu Ecological and Environment Monitoring Center ChengduSichuan 610011China

As most air quality monitoring sites are in urban areas worldwide,machine learning models may produce substantial estimation bias in rural areas when deriving spatiotemporal distributions of air *** bias stems from the issue of dataset shift,as the density distributions of predictor variables differ greatly between urban and rural *** propose a data-augmentation approach based on the multiple imputation by chained equations(MICE-DA)to remedy the dataset shift *** with the benchmark models,MICE-DA exhibits superior predictive performance in deriving the spatiotemporal distributions of hourly PM2.5 in the megacity(Chengdu)at the foot of the Tibetan Plateau,especially for correcting the estimation bias,with the mean bias decreasing from-3.4µg/m3 to-1.6µg/*** a complement to the holdout validation,the semi-variance results show that MICE-DA decently preserves the spatial autocorrelation pattern of PM2.5 over the study *** essence of MICE-DA is strengthening the correlation between PM2.5 and aerosol optical depth(AOD)during the data ***,the importance of AOD is largely enhanced for predicting PM2.5,and the summed relative importance value of the two satellite-retrieved AOD variables increases from 5.5%to 18.4%.This study resolved the puzzle that AOD exhibited relatively lower importance in local or regional *** results of this study can advance the utilization of satellite remote sensing in modeling air quality while drawing more attention to the common dataset shift problem in data-driven environmental research.

关键词： Aerosol optical depth Dataset shift Spatiotemporal Distribution Air quality monitoring Multiple imputation by chained equations

Construction of homozygous diploid potato through maternal haploid induction

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

aBIOTECH 2022年第3期3卷 163-168页

作者： Jinzhe Zhang Jian Yin Jiayi Luo die tang Xijian Zhu Jie Wang Zhihong Liu Pei Wang Yu Zhong Chenxu Liu Canhui Li Shaojiang Chen Sanwen Huang Institute of Vegetables and Flowers Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of AgricultureSino-Dutch Joint Laboratory of Horticultural GenomicsBeijing100081China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen518120China The AGISCAAS-YNNU Joint Academy of Potato Sciences Yunnan Normal UniversityKunming650500China National Maize Improvement Center of China Key Laboratory of Crop Heterosis and Utilization/Engineering Research Center for Maize BreedingMinistry of EducationCollege of Agronomy and BiotechnologyChina Agricultural UniversityBeijing100193China

Reinventing the tetraploid potato into a seed-propagated,diploid,hybrid potato would significantly accelerate potato *** this regard,the development of highly homozygous inbred lines is a prerequisite for breeding hybrid potatoes,but self-incompatibility and inbreeding depression present challenges for developing pure inbred *** resolve this impediment,we developed a doubled haploid(DH)technology,based on mutagenesis of the potato DOMAIN OF UNKNOWN FUNCTION 679 membrane protein(StDMP)***,we show that a deficiency in StDMP allows the generation of maternal haploids for generating diploid potato *** exercisable protocol,involving hybridization,fluorescent marker screening,molecular and flow cytometric identification,and doubling with colchicine generates nearly 100%homozygous diploid potato *** dmp-triggered haploid induction(HI)system greatly shortens the breeding process and offers a robust method for generating diploid potato inbred lines with high purity.

关键词： Doubled haploid technology Haploid induction Diploid potato Inbred lines StDMP

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

植物基因组组装技术研究进展

生物技术通报 2021年第6期37卷 1-12页

作者：唐蝶周倩中国农业科学院深圳农业基因组研究所深圳518124 鹏城实验室深圳518055

获得包含基因组全序列的参考基因组是对物种进行基因组学研究和利用的前提。大多数被子植物经历过全基因组复制或多倍化以及随后的染色体重排、丢失,很多植物还经历过重复序列大规模扩张,导致了基因组大小的剧烈膨胀,这些事件塑造了植... 详细信息

获得包含基因组全序列的参考基因组是对物种进行基因组学研究和利用的前提。大多数被子植物经历过全基因组复制或多倍化以及随后的染色体重排、丢失,很多植物还经历过重复序列大规模扩张,导致了基因组大小的剧烈膨胀,这些事件塑造了植物基因组复杂的特征和广泛的多样性,也在一定程度上导致了植物基因组组装的诸多难题。本文将植物基因组按照简单、高杂合、高重复、高倍性基因组和泛基因组进行分类,介绍不同类型的基因组适用的组装策略及应用效果,并对新测序技术在组装中的应用趋势进行展望。

关键词：植物基因组基因组组装高通量测序生物信息学

膈下迷走神经切断对大鼠中枢nesfatin-1抑酸作用的影响

在线全文

学校读者我要写书评

暂无评论

世界华人消化杂志 2016年第7期24卷 1002-1008页

作者：黄琳汤梦蝶李学良林琳南京医科大学第一附属医院消化内科江苏省南京市210029

目的:探讨双侧膈下迷走神经切断对侧脑室注射nesfatin-1的抑酸作用的影响.方法:♂SD大鼠,侧脑室置管后,每只大鼠分别给予侧脑室注射1、5和50 pmol的nesfatin-1及等体积的灭菌水(5μL/rat),于2 h后处死大鼠,收集胃液,测定其胃酸的变化,... 详细信息

目的:探讨双侧膈下迷走神经切断对侧脑室注射nesfatin-1的抑酸作用的影响.方法:♂SD大鼠,侧脑室置管后,每只大鼠分别给予侧脑室注射1、5和50 pmol的nesfatin-1及等体积的灭菌水(5μL/rat),于2 h后处死大鼠,收集胃液,测定其胃酸的变化,用实时定量PCR检测(real-time quantitative PCR,qRT-PCR)检测胃黏膜中H^+/K^+-ATPase mRNA的表达、测定酶的活性.另外,将侧脑室成功置管的♂SD大鼠分成迷走神经切断组和假手术组,每组分别给予nesfatin-1(50pmol)及等体积的灭菌水(5μL/rat),于2 h后处死大鼠,观察迷走神经切断术对nesfatin-1引起的胃酸变化的影响.结果:大鼠侧脑室注射浓度为5 pmol和50pmol的nesfatin-1后2 h,大鼠胃酸分泌减少,其中50 pmol作用最强(P0.05).结论:侧脑室注射nesfatin-1可呈剂量依赖性地抑制大鼠胃酸的分泌,这一效应可能是通过激活迷走神经途径实现的.

关键词： Nesfatin-1 胃酸分泌 H^+/K^+-ATP酶迷走神经切断

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于会话含义理论的《飘》中人物会话分析

昭通学院学报 2020年第2期42卷 57-61页

作者：马群英唐喋西南石油大学外国语学院四川成都610000

从语用学视角,基于会话含义理论对该小说中人物会话分析研究,旨在通过对小说中四个主要人物在会话过程中对合作原则的违背,探讨话语的间接性,从而解读其人物形象、性格特征,探究《飘》在现下的中国仍拥有广泛读者的深层原因.

关键词：合作原则会话含义《飘》人物分析

Prediction and optimization of flue pressure in sintering process based on SHAP

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 346-359页

作者： Mingyu Wang Jue tang Mansheng Chu Quan Shi Zhen Zhang School of Metallurgy Northeastern UniversityShenyang 110819China Liaoning Low-Carbon Steelmaking Technology Engineering Research Center Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-Carbon Steelmaking(Ministry of Education) Shenyang 110819China

Sinter is the core raw material for blast *** pressure,which is an important state parameter,affects sinter *** this paper,flue pressure prediction and optimization were studied based on the shapley additive explanation(SHAP)to predict the flue pressure and take targeted adjustment ***,the sintering process data were collected and processed.A flue pressure prediction model was then constructed after comparing different feature selection methods and model algorithms using SHAP+extremely random-ized trees(ET).The prediction accuracy of the model within the error range of±0.25 kPa was 92.63%.SHAP analysis was employed to improve the interpretability of the prediction *** effects of various sintering operation parameters on flue pressure,the relation-ship between the numerical range of key operation parameters and flue pressure,the effect of operation parameter combinations on flue pressure,and the prediction process of the flue pressure prediction model on a single sample were analyzed.A flue pressure optimization module was also constructed and analyzed when the prediction satisfied the judgment *** operating parameter combination was then *** flue pressure was increased by 5.87%during the verification process,achieving a good optimization effect.

关键词： sintering process flue pressure shapley additive explanation prediction optimization

动态高压微射流处理对方竹笋膳食纤维理化及结构特性的影响

在线全文

学校读者我要写书评

暂无评论

食品与机械 2021年第6期37卷 24-29页

作者：汤彩碟张甫生杨金来吴良如郑炯西南大学食品科学学院重庆400715 食品科学与工程国家级实验教学示范中心(西南大学) 重庆400715 国家林业和草原局竹子研究开发中心浙江杭州310012

以方竹笋中提取的膳食纤维为研究对象,采用动态高压微射流(dynamic high-pressure micro-fluidization,DHPM)在不同压力条件(0,50,100,150,200 MPa)下进行处理,探究其对竹笋膳食纤维(bamboo shoots dietary fiber,BSDF)理化和结构特性的影响。结果表明,随着处理压力的增大,BSDF粒径先增大后减小,当处理压力为150 MPa时,粒径最小,为(370±11)nm,此条件下BSDF的持水力、持油力和膨胀力达到最大,较对照组分别提高了47.74%,50.54%,61.27%,且差异显著(P<0.05)。红外光谱分析表明DHPM处理不会改变BSDF的官能团,但会使BSDF内部的部分氢键断裂和半纤维素、木质素等发生降解;X射线衍射和热重分析表明DHPM处理不会引起BSDF的晶体结构改变,但晶体有序度会下降,进而导致其热稳定性降低;微观结构分析显示DHPM处理会使BSDF颗粒尺寸减小、表面粗糙、组织松散,且当处理压力为200 MPa时,颗粒发生团聚。综上,DHPM可以有效改善BSDF的理化性质,在膳食纤维改性方面具有一定的应用价值。

关键词：动态高压微射流方竹笋膳食纤维粒径微观结构

Impact of ocean data assimilation on the seasonal forecast of the 2014/15 marine heatwave in the Northeast Pacific Ocean

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2025年第1期18卷 24-31页

作者： Tiantian tang Jiaying He Huihang Sun Jingjia Luo Institute for Climate and Application Research(ICAR)/Key Laboratory of Meteorological Disaster Nanjing University of Information Science and TechnologyNanjingChina

A remarkable marine heatwave,known as the“Blob”,occurred in the Northeast Pacific Ocean from late 2013 to early 2016,which displayed strong warm anomalies extending from the surface to a depth of 300 *** study employed two assimilation schemes based on the global Climate Forecast System of Nanjing University of Information Science(NUIST-CFS 1.0)to investigate the impact of ocean data assimilation on the seasonal prediction of this extreme marine *** sea surface temperature(SST)nudging scheme assimilates SST only,while the deterministic ensemble Kalman filter(EnKF)scheme assimilates observations from the surface to the deep *** latter notably improves the forecasting skill for subsurface temperature anomalies,especially at the depth of 100-300 m(the lower layer),outperforming the SST nudging *** excels in predicting both horizontal and vertical heat transport in the lower layer,contributing to improved forecasts of the lower-layer warming during the *** improvements stem from the assimilation of subsurface observational data,which are important in predicting the upper-ocean *** results suggest that assimilating ocean data with the EnKF scheme significantly enhances the accuracy in predicting subsurface temperature anomalies during the Blob and offers better understanding of its underlying mechanisms.

关键词： Seasonal forecast Ocean data assimilation Marine heatwave Subsurface temperature