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Dynamics and genetic regulation of macronutrient concentrations during grain development in maize

Journal of Integrative Agriculture 2024年第3期23卷 781-794页

作者： Pengcheng Li Shuangyi Yin Yunyun Wang Tianze Zhu Xinjie Zhu Minggang Ji Wenye Rui Houmiao Wang Chenwu Xu zefeng yang Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Agricultural CollegeYangzhou UniversityYangzhou 225009China Jiangsu Co-lnnovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009China

Nitrogen(N), phosphorus(P), and potassium(K) are essential macronutrients that are crucial not only for maize growth and development, but also for crop yield and quality. The genetic basis of macronutrient dynamics and accumulation during grain filling in maize remains largely unknown. In this study, we evaluated grain N, P, and K concentrations in 206 recombinant inbred lines generated from a cross of DH1M and T877 at six time points after pollination. We then calculated conditional phenotypic values at different time intervals to explore the dynamic characteristics of the N, P, and K concentrations. Abundant phenotypic variations were observed in the concentrations and net changes of these nutrients. Unconditional quantitative trait locus(QTL) mapping revealed 41 non-redundant QTLs, including 17, 16, and 14 for the N, P, and K concentrations, respectively. Conditional QTL mapping uncovered 39 non-redundant QTLs related to net changes in the N, P, and K concentrations. By combining QTL, gene expression, co-expression analysis, and comparative genomic data, we identified 44, 36, and 44 candidate genes for the N, P, and K concentrations, respectively, including GRMZM2G371058 encoding a Doftype zinc finger DNA-binding family protein, which was associated with the N concentration, and GRMZM2G113967encoding a CBL-interacting protein kinase, which was related to the K concentration. The results deepen our understanding of the genetic factors controlling N, P, and K accumulation during maize grain development and provide valuable genes for the genetic improvement of nutrient concentrations in maize.

关键词： maize nutrient concentration unconditional QTL mapping conditional QTL mapping dynamic trait

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Combining QTL Mapping and Multi-Omics Identify Candidate Genes for Nutritional Quality Traits during Grain Filling Stage in Maize

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1441-1453页

作者： Pengcheng Li Tianze Zhu Yunyun Wang Shuangyi Yin Xinjie Zhu Minggang Ji Wenye Rui Houmiao Wang zefeng yang Chenwu Xu Jiangsu Key Laboratory of Crop Genetics and Physiology Key Laboratory of Plant Functional Genomics of the Ministry of EducationJiangsu Key Laboratory of Crop Genomics and Molecular BreedingAgricultural College of Yangzhou UniversityYangzhou225009China Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou225009China

The nutritional composition and overall quality of maize kernels are largely determined by the key chemical com-ponents:protein,oil,and ***,the genetic basis underlying these nutritional quality traits during grainﬁlling remains poorly *** this study,the concentrations of protein,oil,and starch were studied in 204 recombinant inbred lines resulting from a cross between DH1M and T877 at four different stages *** the traits exhibited considerable phenotypic *** the grain-ﬁlling stage,the levels of protein and starch content generally increased,whereas oil content decreased,with signiﬁcant changes observed between 30 and 40 days after *** trait locus(QTL)mapping was conducted and a total of 32 QTLs,comprising 14,12,and 6 QTLs for grain protein,oil,and starch content were detected,*** QTLs were consistently detectable across different time *** integrating QTL analysis,glo-bal gene expression proﬁling,and comparative genomics,we identiﬁed 157,86,and 54 differentially expressed genes harboring nonsynonymous substitutions between the parental lines for grain protein,oil,and starch con-tent,*** gene function annotation prioritized 15 candidate genes potentially involved in reg-ulating grain quality traits,including those encoding transcription factors(NAC,MADS-box,bZIP,and MYB),cell wall invertase,cellulose-synthase-like protein,cell division cycle protein,trehalase,auxin-responsive factor,and phloem protein *** study offers signiﬁcant insights into the genetic architecture of maize kernel nutritional quality and identiﬁes promising QTLs and candidate genes,which are crucial for the genetic enhance-ment of these traits in maize breeding programs.

关键词： Maize protein oil starch QTL mapping candidate genes

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Ice-covered Environmental Adaptability Assessment for Overhead Contact System in High-speed Railways

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Chinese Journal of Electrical Engineering 2024年第2期10卷 70-79页

作者： Huan Zhang Wenfu Wei Like Pan zefeng yang Guizao Huang Yuxin Liu Xing Chen Ziqian yang Guangning Wu School of Electrical Engineering Southwest Jiaotong UniversityChengdu 611756China National Rail Transit Electrification and Automation Engineering Technology Research Center Southwest Jiaotong UniversityChengdu 611756China China Academy of Railway Sciences Corporation Limited Beijing 100000China

High-speed trains rely on pantograph-catenary systems(PCSs)to collect electrical energy from power ***,the dynamic interaction between the pantograph and the catenary system may become mismatched once ice accumulates on the overhead *** frequent arcing may occur within the PCS during train operation,posing an unpredictable threat to operational ***,it is crucial to evaluate the ability of overhead contact system(OCS)to withstand ice-covered variability during line desgin.A new strategy is proposed to evaluate the adaptive performance of an OCS under various icing ***,a dynamic model considering icing conditions is constructed to simulate the interaction within the *** different OCS structures with various icing thicknesses are *** parameters of the contact force within the PCS and proportion of high-possibility arcing moments are *** dependence of the contact force on the icing thickness and pantograph displacement has been illustrated in the form of cloud ***,the OCS sensitivity coefficient is calculated,and ice-covered environmental adaptability assessments for the five different OCS structures are compared.

关键词： Overhead contact system environmental adaptability sensitivity coefficient icing thickness contact force

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Rice melatonin deficiency causes premature leaf senescence via DNA methylation regulation

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The Crop Journal 2024年第3期12卷 721-731页

作者： Yue Lu Ahmed Gharib Rujia Chen Hanyao Wang Tianyun Tao Zhihao Zuo Qing Bu Yanze Su Yaoqing Li Yanmo Luo Hamdi F.El-Mowafi Zhichao Wang Qianfeng Huang Shuting Wang yang Xu Pengcheng Li Chenwu Xu zefeng yang Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education Agriculture College of Yangzhou UniversityYangzhou 225009JiangsuChina Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Jiangsu Key Laboratory of Crop Genetics and PhysiologyYangzhou UniversityYangzhou 225009JiangsuChina National Institute of Laser Enhanced Sciences(NILES) Cairo UniversityGiza 12613Egypt Rice Research Department Field Crops Research InstituteAgricultural Research CenterSakhaKafr El-Sheikh 33717Egypt

In a study of DNA methylation changes in melatonin-deficient rice mutants,mutant plants showed premature leaf senescence during grain-filling and reduced grain *** deficiency led to transcriptional reprogramming,especially of genes involved in chlorophyll and carbon metabolism,redox regulation,and transcriptional regulation,during dark-induced leaf *** of mCG and mCHG in the melatonin-deficient rice mutants was associated with the expression change of both protein-coding genes and transposable element-related *** in gene expression and DNA methylation in the melatonin-deficient mutants were compensated by exogenous application of melatonin.A decreased S-adenosyl-L-methionine level may have contributed to the DNA methylation variations in rice mutants of melatonin deficiency under dark conditions.

关键词： Melatonin Premature leaf senescence Rice DNA methylation Epigenetic regulation

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Pijx confers broad-spectrum seedling and panicle blast resistance by promoting the degradation of ATP b subunit and OsRbohC-mediated ROS burst in rice

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Molecular Plant 2024年第4期17卷 672-675页

作者： Ning Xiao Yunyu Wu Xiaoxiang Zhang Zeyun Hao Zichun Chen zefeng yang Yue Cai Ruyi Wang Ling Yu Zhiping Wang Yue Lu Wei Shi Cunhong Pan Yuhong Li Changhai Zhou Jianju Liu Niansheng Huang Guangqing Liu Hongjuan Ji Shuhao Zhu Shuai Fang Yuese Ning Aihong Li 不详

(Molecular Plant 16,1832-1846,November 62023)The originally published version of this manuscript contained several small mistakes in the labels and legends of main and supplemental figures,along with a few small mistakes in the main text,that have now been ***,in Figure 6G,the label“NILGY31^(Pijx)”has been corrected to“NIL^(Pijx)”,and in the legend of Figure 6H,“PPL^(Pijx Piz-t)”and“PPL^(Pijx Pigm)”have been corrected to“NIL^(Piz-t Pijx)”and“PPL^(Pigm Pijx).”In Figure S8A。

关键词： seedling Figure panicle

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预氧化碳纤维增强受电弓碳滑板材料的研究

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铁道学报 2024年第6期46卷 56-64页

作者：赵阳李杰杨泽锋高国强魏文赋吴广宁西南交通大学电气工程学院四川成都610031

利用预氧化碳纤维(OPF)和沥青、焦炭等为原料,采用热压、焙烧等工艺制备预氧化碳纤维增强受电弓碳滑板;研究不同OPF含量受电弓碳滑板导电导热以及力学性能;利用扫描电镜(SEM)、偏光显微镜(POM)、X射线衍射仪(XRD)等仪器对复合材料内部... 详细信息

利用预氧化碳纤维(OPF)和沥青、焦炭等为原料,采用热压、焙烧等工艺制备预氧化碳纤维增强受电弓碳滑板;研究不同OPF含量受电弓碳滑板导电导热以及力学性能;利用扫描电镜(SEM)、偏光显微镜(POM)、X射线衍射仪(XRD)等仪器对复合材料内部结构进行观察。结果表明:滑板材料性能的提升与OPF/沥青间的共碳化界面以及界面处与基体中的微晶网络形成有关。OPF质量分数为1.5%的复合材料具有较好的导电导热以及力学性能,电导率和导热系数分别为279.33 S/cm和3.37 W/(m·K),抗压强度和抗折分别为155.00、48.85 MPa,且符合受电弓碳滑板性能要求。

关键词：受电弓碳滑板预氧化碳纤维复合材料导电导热性能力学性能

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高油酸花生品种展示试验

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安徽农学通报 2024年第17期30卷 38-41页

作者：徐胜杨泽峰安徽省农业技术推广总站安徽合肥230000 安徽省阜南县农业技术推广中心安徽阜南236300

为科学促进高油酸花生生产,筛选出优质多抗高油酸花生品种,有效提高其产量品质和种植效益。本研究对豫花22、阜花35和豫花37等10个高油酸花生品种进行展示比较试验。结果表明,品种豫花37、花育958和冀花11的生育期适宜、生育进程稳健、... 详细信息

为科学促进高油酸花生生产,筛选出优质多抗高油酸花生品种,有效提高其产量品质和种植效益。本研究对豫花22、阜花35和豫花37等10个高油酸花生品种进行展示比较试验。结果表明,品种豫花37、花育958和冀花11的生育期适宜、生育进程稳健、田间长势长相好、抗旱耐病性强且产量高,可作为高油酸花生品种在研究区及相似区域推广种植。

关键词：高油酸花生品种筛选展示试验花生产量

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A multivariate partial least squares approach to joint association analysis for multiple correlated traits

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The Crop Journal 2016年第1期4卷 21-29页

作者： yang Xu Wenming Hu zefeng yang Chenwu Xu Jiangsu Key Laboratory of Crop Genetics and Physiology Co-Innovation Center for Modern Production Technology of Grain CropsKey Laboratory of Plant Functional Genomics of the Ministry of Education Yangzhou University

Many complex traits are highly correlated rather than independent. By taking the correlation structure of multiple traits into account, joint association analyses can achieve both higher statistical power and more accurate estimation. To develop a statistical approach to joint association analysis that includes allele detection and genetic effect estimation, we combined multivariate partial least squares regression with variable selection strategies and selected the optimal model using the Bayesian Information Criterion(BIC). We then performed extensive simulations under varying heritabilities and sample sizes to compare the performance achieved using our method with those obtained by single-trait multilocus methods. Joint association analysis has measurable advantages over single-trait methods, as it exhibits superior gene detection power, especially for pleiotropic genes. Sample size, heritability,polymorphic information content(PIC), and magnitude of gene effects influence the statistical power, accuracy and precision of effect estimation by the joint association analysis.

关键词： Association analysis Multiple correlated traits Supersaturated model Multilocus Multivariate partial least squares

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Genetic mapping of quantitative trait loci in crops

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The Crop Journal 2017年第2期5卷 175-184页

作者： yang Xu Pengcheng Li zefeng yang Chenwu Xu Jiangsu Provincial Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops Key Laboratory of Plant Functional Genomics of Ministry of Education Yangzhou University Yangzhou 225009 China

Dissecting the genetic architecture of complex traits is an ongoing challenge for *** complementary approaches for genetic mapping,linkage mapping and association mapping have led to successful dissection of complex traits in many crop *** of these methods detect quantitative trait loci(QTL) by identifying marker–trait associations,and the only fundamental difference between them is that between mapping populations,which directly determine mapping resolution and *** on this difference,we first summarize in this review the advances and limitations of family-based mapping and natural population-based mapping instead of linkage mapping and association *** then describe statistical methods used for improving detection power and computational speed and outline emerging areas such as large-scale meta-analysis for genetic mapping in *** the era of next-generation sequencing,there has arisen an urgent need for proper population design,advanced statistical strategies,and precision phenotyping to fully exploit high-throughput genotyping.

关键词： Family-based mapping Natural population-based mapping Mixed linear model MAGIC population Meta-analysis Genotyping by sequencing

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常温氧化中预氧化温度对煤体影响规律和机理研究

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皮革制作与环保科技 2024年第4期5卷 179-181页

作者：杨泽锋陆伟安徽理工大学安全科学与工程学院安徽淮南232000

在预氧化过程中,会产生温度分布变化,从而影响煤的自燃特性规律。通过进行常温氧化试验对不同预氧化温度煤体的煤心温度变化、CO和CO_(2)等指标性气体变化进行分析,得出随着预氧化温度的提高,会促进煤体发生自燃的结论,并对其产生的可... 详细信息

在预氧化过程中,会产生温度分布变化,从而影响煤的自燃特性规律。通过进行常温氧化试验对不同预氧化温度煤体的煤心温度变化、CO和CO_(2)等指标性气体变化进行分析,得出随着预氧化温度的提高,会促进煤体发生自燃的结论,并对其产生的可能环境原因进行了分析和探讨。

关键词：煤自燃二次氧化气体分析温度分析

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