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Selection footprints reflect genomic changes associated with breeding efforts in 56 cucumber inbred lines

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Horticulture Research 2019年第1期6卷 145-153页

作者： Bin Liu Dailu Guan Xuling Zhai Sen Yang Shudan Xue Shuying Chen Jing Huang huazhong ren Xingwang Liu Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops College of HorticultureChina Agricultural UniversityBeijing 100193P.R.China Centre for Research in Agricultural Genomics(CRAG) CSIC-IRTA-UAB-UBCampus Universitat Autònoma de BarcelonaBellaterra 08193Spain Department of Agronomy College of AgriculturePurdue UniversityWest LafayetteIN 47907USA

Cucumber selective breeding over recent decades has dramatically increased productivity and quality,but the genomic characterizations and changes associated with this breeding history remain ***,we analyzed the genome resequencing data of 56 artificially selected cucumber inbred lines that exhibit various phenotypes to detect trait-associated sequence variations that reflect breeding *** found that the 56 cucumber lines could be assigned to group 1 and group 2,and the two groups formed a distinctive genetic structure due to the breeding history involving hybridization and *** selected regions were identified between group 1 and group 2,with implications for genomic-selection breeding *** regions included known quantitative trait loci or genes that were reported to be associated with agronomic *** results advance knowledge of cucumber genomics,and the 56 selected inbred lines could be good germplasm resources for breeding.

关键词： breeding germplasm signature

Glandular trichomes:new focus on horticultural crops

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Horticulture Research 2021年第1期8卷 2241-2251页

作者： Zhongxuan Feng Ezra S.Bartholomew Ziyu Liu Yuanyuan Cui Yuming Dong Sen Li Haoying Wu huazhong ren Xingwang Liu Engineering Research Center of the Ministry of Education for Horticultural Crops Breeding and Propagation College of HorticultureChina Agricultural University100193 BeijingP.R.China Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops College of HorticultureChina Agricultural University100193 BeijingP.R.China Library of China Agricultural University China Agricultural University100193 BeijingP.R.China State Key Laboratory of Vegetable Germplasm Innovation TianjinChina

Plant glandular trichomes(GTs)are epidermal outgrowths with the capacity to biosynthesize and secrete specialized metabolites,that are of great scientific and practical *** understanding of the developmental process of GTs is limited,and no single plant species serves as a unique ***,we review the genetic mechanisms of GT initiation and development and provide a summary of the biosynthetic pathways of GT-specialized metabolites in nonmodel plant species,especially horticultural *** discuss the morphology and classification of GT ***,we highlight technological advancements in methods employed for investigating *** the molecular basis of GT development and specialized metabolites not only offers useful avenues for research in plant breeding that will lead to the improved production of desirable metabolites,but also provides insights for plant epidermal development research.

关键词： specialized crops breeding

朱砂中汞的二乙基二硫代氨基甲酸盐柱前衍生化HPLC测定

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中国医药工业杂志 2008年第11期39卷 849-852页

作者：何毓敏任华忠刘小琴三峡大学医学院湖北宜昌443002 成都中医药大学峨眉学院四川峨眉山614201

建立了柱前衍生化HPLC法测定朱砂中的汞含量。以二乙基二硫代氨基甲酸钠(NaDDC)为衍生化试剂,样品经消解、衍生化和有机溶剂提取后测定。采用C18色谱柱,流动相为甲醇-水(含0.022mmol/LNaDDC)(90∶10),检测波长为272nm。结果Hg2+在8.4～4... 详细信息

建立了柱前衍生化HPLC法测定朱砂中的汞含量。以二乙基二硫代氨基甲酸钠(NaDDC)为衍生化试剂,样品经消解、衍生化和有机溶剂提取后测定。采用C18色谱柱,流动相为甲醇-水(含0.022mmol/LNaDDC)(90∶10),检测波长为272nm。结果Hg2+在8.4～42.0μg/ml浓度范围内线性关系良好,检测限为4.2ng,平均回收率为99.9%,RSD为2.2%。

关键词：汞朱砂二乙基二硫代氨基甲酸钠柱前衍生化高效液相色谱测定

Classification of fruit trichomes in cucumber and effects of plant hormones on Type II fruit trichome development

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Classification of fruit trichomes in cucumber and effects of...

Classification of fruit trichomes in cucumber and effects of plant hormones on Type Ⅱ fruit trichome development

中国园艺学会第八届黄瓜学术研讨会

作者：薛舒丹 Mingming Dong Xingwang Liu Shuo Xu Jinan Pang Wenzhu Zhang Yiqun Weng huazhong ren Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops of Beijing Department of Vegetable ScienceCollege of HorticultureChina Agricultural University

The fruit trichomes or fruit spines of cucumber,Cucumis sativus L,are highly specialized structures originating from epidermal cells with diverse morphology,which grow perpendicular to the fruit *** understand the underlying molecular mechanisms of fruit trichome development,in this study,we conducted morphological characterization and classification of cucumber fruit trichomes and their developmental *** examined the fruit trichomes among 200 cucumber varieties,which could be classified into eight morphologically distinct types(I to VIII).Investigation of the organogenesis of the eight types of trichomes revealed two main developmental *** development of glandular trichomes had multiple stages including initiation and expansion of the trichome precursor cell which protuberating out of the epidermal surface,followed by periclinal bipartition to two cells(top and bottom) which later formed the head region and the stalk,respectively through subsequent cell *** non-glandular trichome development started with expansion of the precursor cell perpendicularly to the epidermal plane followed by cell periclinal division to form a stalk comprising of some rectangle cells and a pointed apex cell;then the base cell started anticlinal bipartition to two cells,which then underwent many cell divisions to form a multicellular spherical *** addition,phytohormones as environmental cues were closely related to trichome *** found that GA and BAP were capable of increasing trichome number per fruit with distinct effects under different concentrations.

关键词： Cucumber Cucumis sativus L fruit trichomes fruit spines organogenesis plant hormone

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Classification of fruit trichomes in cucumber and effects of...

利用AB算法进行高分四号卫星数据反照率反演

中国园艺学会第八届黄瓜学术研讨会

作者： Shudan Xue Mingming Dong Xingwang Liu Shuo Xu Jinan Pang Wenzhu Zhang Yiqun Weng huazhong ren Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops College of HorticultureChina Agricultural University

The fruit trichomes or fruit spines of cucumber,Cucumis sativus L.,are highly specialized structures originating from epidermal cells with diverse morphology,which grow perpendicular to the fruit *** understand the underlying molecular mechanisms of fruit trichome development,in this study,we conducted morphological characterization and classification of cucumber fruit trichomes and their developmental *** examined the fruit trichomes among 200 cucumber varieties,which could be classified into eight morphologically distinct types(ⅠtoⅧ).Investigation of the organogenesis of the eight types of trichomes revealed two main developmental *** development of glandular trichomes had multiple stages including initiation and expansion of the trichome precursor cell which protuberating out of the epidermal surface,followed by periclinal bipartition to two cells(top and bottom) which later formed the head region and the stalk,respectively through subsequent cell *** non-glandular trichome development started with expansion of the precursor cell perpendicularly to the epidermal plane followed by cell periclinal division to form a stalk comprising of some rectangle cells and a pointed apex cell;then the base cell started anticlinal bipartition to two cells,which then underwent many cell divisions to form a multicellular spherical *** addition,phytohormones as environmental cues were closely related to trichome *** found that GA and BAP were capable of increasing trichome number per fruit with distinct effects under different concentrations.

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武汉大学学报（信息科学版） 2020年第4期45卷 542-549页

作者：韩谷怀秦其明任华忠汪子豪北京大学地球科学学院遥感与地理信息系统研究所北京100871 空间信息集成与3S工程应用北京市重点实验室北京100871 地理信息基础软件与应用工程技术研究中心北京100871

地表反照率(Albedo)是地表能量收支平衡的重要地表参数。作为新近发射的地球同步轨道卫星,高分四号(GF-4)卫星拥有优于同类卫星的高时间高空间分辨率,然而由于其观测角度单一,基于双向反射分布函数(bidirectional reflectance distribut... 详细信息

地表反照率(Albedo)是地表能量收支平衡的重要地表参数。作为新近发射的地球同步轨道卫星,高分四号(GF-4)卫星拥有优于同类卫星的高时间高空间分辨率,然而由于其观测角度单一,基于双向反射分布函数(bidirectional reflectance distribution function,BRDF)的传统反演方法难以实现地表反照率的精确快速反演,因此采用基于单一观测角度的角度格网法(angular bin,AB1)。首先,利用先验的多角度地球反射极化和方向测量仪(POLarization and Directionality of the Earth’s Reflectances,POLDER)卫星观测数据,建立反照率与某一方向反射率之间的经验关系;然后,利用POLDER卫星和GF-4卫星的光谱响应函数与光谱库数据,将该经验关系转换为基于GF-4卫星的反照率与反射率经验关系(即查找表);通过输入单一角度的GF-4卫星反射率数据,得到GF-4卫星反照率结果;最后,利用中分辨率成像光谱仪(Moderate-resolution Imaging Spectroradiometer,MODIS)与Landsat 8地表反照率结果对反演结果进行交叉验证。结果表明,MODIS反照率与GF-4反照率的均方根误差(root mean square error,RMSE)为0.027 3,Landsat 8反照率与GF-4反照率的RMSE为0.017 6,说明基于AB1算法的反照率反演结果精度可靠,这对于GF-4卫星的反照率产品生产具有一定的应用意义。

关键词：遥感反演高分四号地表反照率 BRDF AB算法

Genome-wide identification and expression pattern of chitinase gene family in Cucumis sativus reveals its role in fusarium wilt resistance

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Genome-wide identification and expression pattern of chitina...

Global Solvability for a Predator-Prey Model with Prey-Taxis and Rotational Flux Terms

中国园艺学会第八届黄瓜学术研讨会

作者： Ezra Bartholomew Yanling Cai Mingming Dong Shudan Xue Yaqi Zhang Xuling Zhail 刘兴旺 huazhong ren 中国农业大学园艺学院

Cucumber(Cucumis sativus L.) is an important vegetable crop cultivated worldwide that is severely impacted by Fusarium oxysporum ***,the casual organism of fusarium ***(EC 3.***.1.14)are chitin-degrading enzymes that hydrolyze the β-(1,4)-linkages in *** are devoid of chitin and it has been proposed that some plant chitinases may play a role in defense response by degrading the chitin in the cell walls of invading fungal *** this study,we performed a comprehensive genome-wide identification and analysis of the chitinase gene family in ***,emphasizing on the phylogenetic relationships and expression profile in response to fusarium wilt.A total of 28 putative chitinase and chitinase-like genes were identified and grouped into five classes(I-V) based on their conserved *** were distributed unevenly across six chromosomes in *** chitinase genes had active sites required for chitinolytic activities and functional redundancy was observed within chitinase *** organ-specific expression of these genes was observed with class I and II chitinases having higher expression levels in the *** genes showed significant responses following *** inoculation,with a class I chitinases being significant up-regulated by 200-fold compared to control *** results offer an insight into the role of chitinase in *** interaction.

关键词： Cucumber Chitinases genome-wide identification expression fusarium wilt

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Chinese Annals of Mathematics,Series B 2024年第2期45卷 297-318页

作者： Guoqiang ren Bin LIU School of Mathematics and Statistics Huazhong University of Science and Technology Hubei Key Laboratory of Engineering Modeling and Scientific Computing Huazhong Universityof Science and Technology

In this paper the author investigates the following predator-prey model with prey-taxis and rotational?ux terms■in a bounded domain with smooth *** presents the global existence of generalized solutions to the model... 详细信息

关键词： Predator-prey Prey-taxis Giopal existence Kotational flnux

Sentinel-3 SLSTR数据的组分温度反演

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遥感学报 2021年第8期25卷 1671-1682页

作者：康童健郭明珠曹彪任华忠范闻捷北京大学遥感与地理信息系统研究所北京100871 中国科学院空天信息创新研究院遥感科学国家重点实验室北京100101

陆表温度是全球气候观测系统的基本变量。由于地表目标多数为具有三维结构、组成成分复杂、温度分布不均一的混合像元,因此相较于平均温度,组分温度具有更明确的物理意义和应用价值,对地—气相互作用过程和水分循环的定量分析研究具有... 详细信息

陆表温度是全球气候观测系统的基本变量。由于地表目标多数为具有三维结构、组成成分复杂、温度分布不均一的混合像元,因此相较于平均温度,组分温度具有更明确的物理意义和应用价值,对地—气相互作用过程和水分循环的定量分析研究具有重要意义。本研究针对Sentinel-3 SLSTR数据,基于CBT-P模型和CE-P模型构建了植被—土壤组分温度反演框架,并分析了劈窗算法和LAI对反演误差的影响。使用小汤山、漯河、塞罕坝3地实测数据进行结果验证,结果表明,5个验证点的植被组分温度反演结果的绝对偏差在0.1—1.6 K之间,平均绝对偏差为1.1 K,土壤组分温度反演结果的绝对偏差在0.5—1.4 K之间,平均绝对偏差为0.8 K,在中纬度的稀疏连续植被和垄行植被冠层中取得了较高的精度,初步证明了本研究提出的Sentinel-3 SLSTR双通道双角度地表组分温度反演算法的可行性。

关键词：遥感植被冠层组分温度劈窗算法 CE-P模型 CBT-P模型 Sentinet-3 SLSTR