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QTL mapping and transcriptome analysis identify candidate genes influencing water–nitrogen interaction in maize

The Crop Journal 2023年第6期11卷 1872-1883页

作者： kunhui he Yakun Zhang Wei Ren Pengyun Chen Jianchao Liu Guohua Mi Fanjun Chen Qingchun Pan State Key Laboratory of Nutrient Use and Management College of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China College of Agronomy Northwest A&F UniversityYangling 712100ShaanxiChina Sanya Institute of China Agricultural University Sanya 572000HainanChina

Water and nitrogen fertilization are the key factors limiting maize *** genetic basis of interactions between maize genotype,water,and nitrogen is unclear.A recombinant inbred line(RIL)maize population was evaluated for seven yield and five agronomic traits under four water and nitrogen conditions:water stress and low nitrogen,water stress and high nitrogen,well-watered and low nitrogen,and well-watered and high *** eight,six,and six traits varied in response to genotype–water interactions,genotype–nitrogen interactions,and genotype–water–nitrogen *** a linkage map consisting of 896 single-nucleotide polymorphism markers and multipleenvironmental quantitative-trait locus(QTL)mapping,we identified 31 QTL,including 12 for genotype–water–nitrogen interaction,across the four treatments.A set of 8060 genes were differentially expressed among *** genetic analysis,gene co-expression,and functional annotation revealed two candidate genes controlling genotype–water–nitrogen interactions,affecting both leaf width and grain *** involved in abscisic acid biosynthesis and bZIP,NAC,and WRKY transcription factors participated in maize response to water and nitrogen *** results represent a step toward understanding the genetic regulatory network of maize that responds to water and nitrogen stress and provide a theoretical basis for the genetic improvement of both water-and nitrogen-use efficiency.

关键词： Quantitative trait loci Water Nitrogen Interaction Maize

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Genetic dissection of N use efficiency using maize inbred lines and testcrosses

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The Crop Journal 2023年第4期11卷 1242-1250页

作者： Xiaoyang Liu kunhui he Farhan Ali Dongdong Li Hongguang Cai Hongwei Zhang Lixing Yuan Wenxin Liu Guohua Mi Fanjun Chen Qingchun Pan Key Laboratory of Plant-Soil Interactions of Ministry of Education National Academy of Agriculture Green DevelopmentCollege of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China Cereal Crops Research Institute Pirsabak NowsheraPakistan College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China Institute of Agricultural Resources and Environment Jilin Academy of Agricultural SciencesChangchun 130033JilinChina Institute of Crop Science Chinese Academy of Agricultural SciencesBeijing 100081China Sanya Institute China Agricultural UniversitySanya 572025HainanChina

Although the use of heterosis in maize breeding has increased crop productivity,the genetic causes underlying heterosis for nitrogen(N) use efficiency(NUE) have been insufficiently *** this study,five N-response traits and five low-N-tolerance traits were investigated using two inbred line populations(ILs) consisting of recombinant inbred lines(RIL) and advanced backcross(ABL) populations,derived from crossing Ye478 with *** populations were crossed with P178 to construct two testcross *** populations,their testcross populations,and the midparent heterosis(MPH)for NUE were *** weight,kernel number,and kernel number per row were sensitive to N level and ILs showed higher N response than did the testcross *** on a highdensity linkage map,138 quantitative trait loci(QTL) were mapped,each explaining 5.6%–38.8% of genetic *** were 52,34 and 52 QTL for IL populations,MPH,and testcross populations,*** finding that 7.6% of QTL were common to the ILs and their testcross populations and that 11.7% were common to the MPH and testcross population indicated that heterosis for NUE traits was regulated by non-additive and non-dominant loci.A QTL on chromosome 5 explained 27% of genetic variation in all of the traits and Gln1-3 was identified as a candidate gene for this ***-wide prediction of NUE traits in the testcross populations showed 14%–51% *** results may be useful for clarifying the genetic basis of heterosis for NUE traits and the candidate gene may be used for genetic improvement of maize NUE.

关键词： Maize Nitrogen use efficiency heterosis Genetic basis

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Application of Bionic Technology in Marine Cruise Equipment:Research Progress and Development Trends

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Journal of Bionic Engineering 2024年第3期21卷 1117-1155页

作者： kunhui Luo Lan Yan Zhiyi Zhu Zhongqiu Wang Hongru Wang Feng Jiang School of Electromechanical and Automation Huaqiao UniversityXiamen36102China National Local Joint Engineering Research Center for Intelligent Manufacturing Technology of Brittle Material Products Xiamen361021China Institute of Oceanographic Instrumentation Shandong Academy of SciencesQilu University of Technology(Shandong Academy of Sciences)Qingdao266100China Shandong Provincial Key Laboratory of Marine Monitoring Instrument Equipment Technology Qingdao266100China National Engineering and Technological Research Center of Marine Monitoring Equipment Qingdao266100China Institute of Manufacturing Engineering Huaqiao UniversityXiamen361021China

This article provides an overview of the application of bionic technology in marine cruising equipment,discussing its research progress and future development *** cruising is a crucial means of gaining insights into the marine environment and conducting scientific ***,conventional marine cruising equipment faces numerous challenges when dealing with complex and ever-changing marine *** technology,as a means of drawing inspiration from the structure and functions of living organisms,offers new approaches and methods to address the challenges faced by marine cruising equipment and has found widespread *** article primarily focuses on the applications and historical developments of bionic technology in propulsion methods,drag reduction,and surface *** summarizes the design principles,manufacturing techniques,and optimization methods for marine biomimetic cruising ***,this paper analyzes the achievements,challenges,and future directions of bionic technology in marine cruising *** application of bionic technology in marine cruising equipment holds vast potential for development,enabling us to better confront the challenges of marine exploration and research by drawing wisdom from nature and driving advancements in marine science.

关键词： Marine cruising equipment Bionic technology Propulsion methods Drag reduction Surface antifouling

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多环境下玉米保绿相关性状遗传位点的挖掘

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中国农业科学 2022年第16期55卷 3071-3081页

作者：常立国何坤辉刘建超西北农林科技大学农学院/农业农村部西北旱区玉米生物与遗传改良重点实验室/陕西省玉米工程技术研究中心

【目的】功能性保绿通常被认为是包括玉米在内的主要作物品种的理想性状。挖掘新的控制玉米保绿相关位点和候选基因，为玉米保绿遗传研究提供理论基础。【方法】以150份由许178和K12组配的重组自交系（recombinant inbred lines,RIL）... 详细信息

【目的】功能性保绿通常被认为是包括玉米在内的主要作物品种的理想性状。挖掘新的控制玉米保绿相关位点和候选基因，为玉米保绿遗传研究提供理论基础。【方法】以150份由许178和K12组配的重组自交系（recombinant inbred lines,RIL）群体为材料，通过Windows QTL Cartographer V2.5的复合区间作图法（composite interval mapping,CIM）对3个保绿相关性状（保绿度（visual stay green,VSG）、吐丝期绿叶数（green leaf number at silking stage,GLNS）和成熟期绿叶数（green leaf number at mature stage,GLNM））进行QTL定位。同时，以139份自然材料组成的关联群体为材料，基于混合线性模型（mixed linear model,MLM），结合50 790个高质量SNP标记，对这3个性状进行全基因组关联分析（genome-wide association study,GWAS）。【结果】基于CIM，利用单环境下的表型值和最佳线性无偏估计值（best linear unbiased prediction,BLUP）对GLNM、GLNS和VSG进行定位，共检测到37个QTL，分布在除第10染色体以外的其他染色体上，LOD范围为2.58—11.36，表型贡献率为4.34%—22.40%。GLNM、GLNS和VSG性状分别检测到14、12和11个位点。其中，4个遗传稳定的QTL(qGLNS2-1、qVSG1-1、qVSG1-2和qVSG7-1)，在3个及以上不同单环境中同时被检测到。利用MLM对保绿相关性状进行全基因组关联分析，共检测到44个超过阈值线的显著SNP，根据SNP标记在B73参考基因组的物理位置，发现共有15个位点落在连锁分析定位到的QTL区间内。【结论】通过QTL定位和全基因组关联分析共同检测到4个遗传稳定的共定位遗传区段（对应的B73参考基因组V4版物理位置区间为第1染色体6.2—8.2 Mb、第2染色体209.1—221.4 Mb、第6染色体96.8—102.1 Mb、第7染色体4.9—11.4 Mb），并挖掘到4个与光合作用和抗逆相关的候选基因（Zm00001d006119、Zm00001d018975、Zm00001d006535和Zm00001d036763）。

关键词：玉米保绿性全基因组关联分析 QTL定位

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QTL mapping and transcriptome analysis identify candidate genes influencing water–nitrogen interaction in maize

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The Crop Journal 2023年第6期

作者： kunhui he Yakun Zhang Wei Ren Pengyun Chen Jianchao Liu Guohua Mi Fanjun Chen Qingchun Pan

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Genetic dissection of N use efficiency using maize inbred lines and testcrosses

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The Crop Journal 2023年第4期

作者： Xiaoyang Liu kunhui he Farhan Ali Dongdong Li Hongguang Cai Hongwei Zhang Lixing Yuan Wenxin Liu Guohua Mi Fanjun Chen Qingchun Pan

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不同光照条件下玉米苗期叶绿素指数的遗传分析

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分子植物育种 2018年第4期16卷 1236-1243页

作者：王亚辉徐淑兔郑倩文杨秋涵何坤辉聂佳伟冯永琴刘建超薛吉全西北农林科技大学农学院农业部西北旱区玉米生物学与遗传育种重点试验室杨凌712100 陕西省玉米工程技术研究中心杨凌712100

为了研究玉米苗期叶片叶绿素光照强度响应的遗传规律,本研究以玉米骨干自交系K22与Dan340为父母本构建的192个重组自交系作为研究材料,采用完备区间作图法(ICIM),对苗期玉米不同叶片黑暗处理前后叶绿素指数SPAD进行了QTL定位分析。分析... 详细信息

为了研究玉米苗期叶片叶绿素光照强度响应的遗传规律,本研究以玉米骨干自交系K22与Dan340为父母本构建的192个重组自交系作为研究材料,采用完备区间作图法(ICIM),对苗期玉米不同叶片黑暗处理前后叶绿素指数SPAD进行了QTL定位分析。分析结果共检测到位于1号、2号、5号、6号、8号染色体的19个QTL,单个QTL可解释4.80%~14.32%的表型变异。其中黑暗处理前分别定位到位于1号、2号、5号、6号染色体的10个QTL,黑暗处理后共检测到位于1号、5号和8号染色体的5个QTL;同时以黑暗处理前后的叶绿素指数差值作为考察叶绿素降解的指标,共检测到位于5号、6号和8号染色体的4个QTL。研究结果说明不同部位叶片的叶绿素调控机理有所不同,而且不同部位叶片光照响应也不同,该结果可为探究叶片光照响应遗传机理提供参考。

关键词：玉米叶绿素数量性状位点光照强度

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Autumn Snow Cover Variability over Northern Eurasia and Roles of Atmospheric Circulation

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Advances in Atmospheric Sciences 2017年第7期34卷 847-858页

作者： kunhui YE Renguang WU Institute of Space and Earth Information Science The Chinese University of Hong Kong Hong Kong China Center for Monsoon System Research/State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

This study analyzes the variability of northern Eurasian snow cover（SC） in autumn and the impacts of atmospheric circulation changes. The region of large SC variability displays a southward shift from September to November, following the seasonal progression of the transition zones of surface air temperature（SAT）. The dominant pattern of SC variability in September and October features a zonal distribution, and that in November displays an obvious west-east contrast. Surface air cooling and snowfall increase are two factors for larger SC. The relative contribution of SAT and snowfall changes to SC, however, varies with the region and depends upon the season. The downward longwave radiation and atmospheric heat advection play important roles in SAT changes. Anomalous convergence of water vapor flux contributes to enhanced *** changes in downward longwave radiation are associated with those in atmospheric water content and column *** in snowfall and the transport of atmospheric moisture determine the atmospheric moisture content in September and October, and the snowfall appears to be a main factor for atmospheric moisture change in November. These results indicate that atmospheric circulation changes play an important role in snow variability over northern Eurasia in autumn. Overall, the coupling between autumn Eurasian snow and atmospheric circulation may not be driven by external forcing.

关键词： Autumn Eurasian snow cover surface air temperature surface heat fluxes atmospheric circulation water vaportransport

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The generalization of a class of impulse stochastic control models of a geometric Brownian motion

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Science in China(Series F) 2009年第6期52卷 983-998页

作者： LIU XiaoPeng LIU kunhui College of Science Beijing Jiaotong University Beijing 100044 China

Recently, international academic circles advanced a class of new stochastic control models of a geometric Brownian motion which is an important kind of impulse control models whose cost structure is different from the others before, and it has a broad applying background and important theoretical significance in financial control and management of *** paper generalizes substantially the above stochastic control models under quite extensive conditions and describes the models more exactly under more normal theoretical system of stochastic *** establishing a set of proper variational equations and proving the existence of its solution, and applying the means of stochastic analysis, this paper proves that the generalized stochastic control models have optimal ***, we also analyze the structure of optimal controls ***, we study the solution function of variational equations in a relatively deep-going way, which constitutes the value function of control models to some *** the analysis methods of this paper are greatly different from those of original reference, this paper possesses considerable originality to some *** addition, this paper gives the strict proof to the part of original reference which is not fairly well-knit in analyses, and makes analyses and discussions of the model have the exactitude of mathematical sense.

关键词： mpulse stochastic control geometric Brownian motion variational equation optimal control

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Effects of Silver Nanoparticles on Soil Microbial Communities and Bacterial Nitrification in Suburban Vegetable Soils

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Pedosphere 2017年第3期27卷 482-490页

作者： WANG Juan SHU kunhui ZHANG Li SI Youbin School of Resources and Environment Anhui Agricultural University

Silver nanoparticles （AgNPs） are widely used antimicrobial compounds; however, they may pose a threat to non-targeted bacteria in the environment. In this study high-throughput sequencing was used to investigate the effects of different concentrations of AgNPs （10, 50, and 100 mg kg-1） on soil microbial community structure during short-term （7 d） exposure. The amounts of Acidobacteria, Actinobacteria, Cyanobacteria, and Nitrospirae significantly decreased with increasing AgNP concentration; meanwhile, several other phyla （e.g., Proteobacteria and Planctomycetes） increased and dominated. Nitrosomonas europaea, a well-characterized ammonia- oxidizing bacterium, was used to study the sensitivity of bacteria to AgNPs and ionic silver （Ag＋）. Flow cytometry was used to monitor the toxicity of low （1 mg L-l）, middle （10 mg L-l）, and high concentrations （20 mg L-1） of AgNPs, as well as Ag＋（1 mg L-1） released into the medium from 20 mg L-1 concentration of AgNPs, towards N. europaea. After 12 h of exposure, the survival rate of N. europaea treated with 1 mg L-1 Ag＋ was significantly lower than those treated with low （1 mg L-1） and middle concentrations （10 mg L-1） of AgNPs, but the survival rate in the treatment with high concentration （20 mg L-1） of AgNPs was much lower. Additionally, necrosis rates were higher in the treatment with 20 mg L-1 AgNPs. Electron microscopy showed that Ag＋ caused serious damage to the cell wall of N. europaea, disintegrated the nucleoids, and condensed next to the cell membrane; however, dissolved Ag＋ is only one of the antibacterial mechanisms of AgNPs.

关键词： ammonia-oxidizing bacterium cell necrosis cytotoxicity silver ions survival rate

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