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Haplotype variations in QTL for salt tolerance in Chinese wheat accessions identified by marker-based and pedigree-based kinship analyses

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The Crop Journal 2020年第6期8卷 1011-1024页

作者： Shizhou Yu Jianhui Wu Meng Wang Weiming Shi Guangmin Xia Jizeng Jia Zhensheng Kang dejun han State Key Laboratory of Crop Stress Biology for Arid Areas Northwest A&F UniversityYangling 712100ShaanxiChina Molecular Genetics Key Laboratory of China Tobacco Guizhou Academy of Tobacco ScienceGuiyang 550081GuizhouChina State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008JiangsuChina Key Laboratory of Plant Cell Engineering and Germplasm Innovation Ministry of EducationSchool of Life SciencesShandong UniversityJinan 250100ShandongChina Key Laboratory of Crop Gene Resources and Germplasm Enhancement Ministry of Agriculture/The National Key Facility for Crop Gene Resources and Genetic ImprovementInstitute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Most modern wheat cultivars were selected on the basis of yield-related indices measured under optimal fertilizer and irrigation *** climate change,land degradation and salinity caused by sea water encroachment,wheat is increasingly subjected to environmental ***,expanding urbanization increasingly encroaches upon prime agricultural land in countries like China,and alternative cropping areas must be *** of these areas have moderate constraining factors,such as ***,it is important to investigate whether current genetic materials and breeding procedures are maintaining adequate variability to address future problems caused by abiotic *** this study,a panel of 307 wheat accessions,including local landraces,exotic cultivars used in Chinese breeding programs and Chinese cultivars released during different periods since1940,were subjected to a genome-wide association study to dissect the genetic basis of salinity *** marker-based and pedigree-based kinship analyses revealed that favorable haplotypes were introduced in some exotic cultivars as well as a limited number of Chinese landraces from the 1940 ***,improvements in salinity tolerance during modern breeding are not as obvious as that of *** broaden genetic diversity for increasing salt tolerance,there is a need to refocus attention on local landraces that have high degrees of salinity tolerance and carry rare favorable alleles that have not been exploited in breeding.

关键词： Genome-wide association study Linkage disequilibrium Salt tolerance Haplotype tracing Triticum aestivum

WHEAT STRIPE RUST AND INTEGRATION OF SUSTAINABLE CONTROL STRATEGIES IN CHINA

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Frontiers of Agricultural Science and Engineering 2022年第1期9卷 37-51页

作者： Qingdong ZENG Jie ZHAO Jianhui WU Gangming Zhan dejun han Zhensheng KANG State Key Laboratory of Crop Stress Biology for Arid Areas Northwest A&F UniversityYangling 712100China

Stripe (yellow) rust caused by Puccinia striiformis f. sp. tritici occurs in almost allwheat-producing regions of the world. Severe countrywide epidemics in Chinahave caused substantial yield losses. Growing resistant cultivars is the beststrategy to control this disease but the pathogen can overcome resistance inwheat cultivars. The high variation in the virulence of the pathogen combinedwith the large areas of susceptible wheat cultivars enables the pathogenpopulation to increase rapidly and disperse over long distances under favorableenvironmental conditions, resulting in severe pandemics within croppingseasons. Current stripe rust control measures are based on many years ofresearch including the underlying epidemiology regarding year-to-year survivalof the pathogen, pathways of pathogen dispersal within seasons and years, therole of P. striiformis sexual hybridization, the use of resistance sources inbreeding programs, and year-round surveillance of national wheat crops that arepresent in different parts of the country throughout the year. All these strategiesdepend on accurate prediction of epidemics, more precise use of fungicides tomeet national requirements and better deployment of resistance genes. Newideas with potential application in sustainable protection of stripe rust includenegative regulatory gene editing, resistance gene overexpression and biologicalcontrol based on microbiomes.

关键词： sustainable disease control integrated control Puccinia striiformis Triticum aestivum

SNP-based linkage mapping for validation of adult plant stripe rust resistance QTL in common wheat cultivar Chakwal 86

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The Crop Journal 2019年第2期7卷 176-186页

作者： Qingdong Zeng Jianhui Wu Shuo Huang Fengping Yuan Shengjie Liu Qilin Wang Jingmei Mu Shizhou Yu Li Chen dejun han Zhensheng Kang State Key Laboratory of Crop Stress Biology for Arid Areas Northwest A&F University Extension Center for Agricultural Technology Agriculture Department of Tibetan Autonomous Region

Wheat crops in China are constantly challenged by stripe rust. Deployment of cultivars with diverse resistances is the best strategy to control the disease. A recombinant inbred line(RIL) population derived from a cross between the resistant cultivar Chakwal 86 and susceptible landrace Mingxian 169 was studied in multiple environments to examine the underlying genetics and to identify quantitative trait loci(QTL) for stripe rust *** hundred and twenty-eight RILs were genotyped with wheat 35 K SNP array and a genome-wide linkage map with 1480 polymorphic SNP markers, or bins, was *** major QTL on chromosomes 1BL and 3BS, and one minor QTL on 6BS had significant effects in reducing stripe rust severity. The QTL were validated using composite interval mapping(CIM) and inclusive composite interval mapping(ICIM). These methods explained59.0%–74.1% of the phenotype variation in disease response. The QTL on chromosome 1 BL was confirmed to be Yr29/Lr46 and the one on 3BS was the resistance allele identified in CIMMYT germplasm but was not Yr30/Sr2. The QTL on 6BS probably corresponded to previously known QTL. RILs with combined QTL were more resistant than those with single or no QTL. Kompetitive allele-specific PCR(KASP) assays for the QTL with largest effect QTL on chromosome 3BS were performed on a subset of RILs and 150 unrelated wheat lines. The QTL on 3BS with its linked KASP markers can be used in marker-assisted selection to improve stripe rust resistance in breeding programs.

关键词： Genetic linkage Haplotype analysis QTL mapping Puccinia striiformis Single nucleotide polymorphism Triticum aestivum

Using UAV-Based Temporal Spectral Indices to Dissect Changes in the Stay-Green Trait in Wheat

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Plant Phenomics 2024年第3期6卷 517-531页

作者： Rui Yu Xiaofeng Cao Jia Liu Ruiqi Nie Chuanliang Zhang Meng Yuan Yanchuan Huang Xinzhe Liu Weijun Zheng Changfa Wang Tingting Wu Baofeng Su Zhensheng Kang Qingdong Zeng dejun han Jianhui Wu College of Agronomy Northwest A&F UniversityYanglingShaanxi 712100China State Key Laboratory of Crop Stress Resistance and High-Efficiency Production Northwest A&F UniversityYanglingShaanxi 712100China College of Mechanical and Electronic Engineering Northwest A&F UniversityYanglingShaanxi 712100China College of Plant Protection Northwest A&F UniversityYanglingShaanxi 712100China

Stay-green(SG)in wheat is a beneficial trait that increases yield and stress ***,conventional phenotyping techniques limited the understanding of its genetic *** indices(SIs)as non-destructive tools to evaluate crop temporal senescence provide an alternative ***,we applied Sls to monitor the senescence dynamics of 565 diverse wheat accessions from anthesis to maturation stages over 2 field *** Sis(normalized difference vegetation index,green normalized difference vegetation index,normalized difference red edge index,and optimized soil-adjusted vegetation index)were normalized to develop relative stay-green scores(RSGS)as the SG *** RSGS-based genome-wide association study identified 47 high-confidence quantitative trait loci(QTL)harboring 3,079 single-nucleotide polymorphisms associated with SG and 1,085 corresponding candidate *** them,15 QTL overlapped or were adjacent to known SG-related QTL/genes,while the remaining QTL were ***,a set of favorable haplotypes of SG-related candidate genes such as TraesCS2A03G1081100,TracesCS6B03G0356400,and TracesCS2B03G1299500 are increasing following the Green Revolution,further validating the feasibility of the *** study provided a valuable reference for further quantitative SG and genetic research in diverse wheat panels.

关键词： changes dissect indices spectral stay-green temporal trait uav-based using wheat

Combined linkage and association mapping reveals two major QTL for stripe rust adult plant resistance in Shaanmai 155 and their haplotype variation in common wheat germplasm

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The Crop Journal 2022年第3期10卷 783-792页

作者： Cai’e Zhou Dan Liu Xu Zhang Qimeng Wu Shengjie Liu Qingdong Zeng Qilin Wang Changfa Wang Chunlian Li Ravi PSingh Sridhar Bhavani Zhensheng Kang dejun han Weijun Zheng Jianhui Wu State Key Laboratory of Crop Stress Biology for Arid Areas College of AgronomyNorthwest A&F UniversityYangling 712100ShaanxiChina State Key Laboratory of Crop Stress Biology for Arid Areas College of Plant ProtectionNorthwest A&F UniversityYangling 712100ShaanxiChina International Maize and Wheat Improvement Center(CIMMYT) El BatanTexcocoEstado de Mexico 56237Mexico

The development and deployment of diverse resistance sources in new wheat cultivars underpin the durable control of stripe *** the present study,two loci for adult plant resistance(APR),QYr SM155.1 and QYr SM155.2,were identified in the Chinese wheat breeding line Shaanmai *** SM155.1 was mapped to a 3.0-c M interval between the single-nucleotide polymorphism(SNP)markers AX-109583610 and AX-110907562 on chromosome arm 2 *** SM155.2 was mapped to a 2.1-c M interval flanked by the SNP markers AX-110378556 and AX-86173526 on chromosome arm 7 AS.A genome-wide association study was used to identify markers associated with APR in a panel of 411 spring wheat *** and 11 SNPs were significantly associated with QYr SM155.1 and QYr SM155.2,respectively,corresponding to physical intervals of 653.75–655.52 Mb on 2 BL and 81.63–83.93 Mb on7 *** characterize the haplotype variation and the distribution of these QTL,haplotype analysis was performed based on these SNPs in an independent panel of 1101 worldwide wheat *** major haplotypes(2 B_h1,2 B_h2,and 2 B_h3)for QYr SM155.1 and four major haplotypes(7 A_h1,7 A_h2,7 A_h3,and 7 A_h4)for QYr SM155.2 were *** individually harboring QYr SM155.1_h1 and QYr SM155.2_h1 haplotypes and their combination displayed *** assays of 1306 current Chinese cultivars and breeding lines using markers flanking QYr SM155.1 and QYr SM155.2 indicated that the resistance haplotypes of the two QTL were present in respectively 1.45%and 14.16%of *** resistance haplotype frequencies at these two loci using marker-assisted selection should benefit wheat production in China.

关键词： Linkage and association mapping Stripe rust resistance QYr SM155.1 QYr SM155.2 Haplotype variation

Characterization of a 4.1 Mb inversion harboring the stripe rust resistance gene YR86 on wheat chromosome 2AL

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The Crop Journal 2024年第4期12卷 1168-1175页

作者： Qiang Cao Zhanwang Zhu Dengan Xu Jianhui Wu Xiaowan Xu Yan Dong Yingjie Bian Fugong Ding Dehui Zhao Yang Tu Ling Wu dejun han Caixia Lan Xianchun Xia Zhonghu He Yuanfeng Hao College of Agronomy Northwest A&F UniversityYangling 712100ShaanxiChina State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural Sciences(CAAS)Beijing 100081China Food Crops Institute Hubei Academy of Agricultural Sciences/Wheat Disease Biology Research Station for Central ChinaWuhan 430064HubeiChina Crop Research Institute Sichuan Academy of Agricultural SciencesChengdu 610066SichuanChina Hubei Hongshan Laboratory College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhan 430070HubeiChina CIMMYT-China Office C/O CAASBeijing 100081China

Wheat cultivar Zhongmai 895 was earlier found to carry YR86 in an 11.6 Mb recombination-suppressed region on chromosome 2AL when crossed with Yangmai *** fine-map the YR86 locus,we developed two large F2 populations from crosses Emai 580/Zhongmai 895 and Avocet S/Zhongmai ***,both populations exhibited suppressed recombination in the same 2AL *** analysis across Chinese Spring,Aikang 58,and 10+wheat genomes revealed a 4.1 Mb chromosomal inversion spanning 708.5-712.6 Mb in the Chinese Spring reference *** markers were developed in the breakpoint and were used to assess a wheat cultivar panel,revealing that Chinese Spring,Zhongmai 895,and Jimai 22 shared a common sequence named InvCS,whereas Aikang 58,Yangmai 16,Emai 580,and Avocet S shared the sequence named *** inverted configuration explained the suppressed recombination observed in all three bi-parental *** recombination was observed in a Jimai 22/Zhongmai 895 F2 population,facilitating mapping of YR86 to a genetic interval of 0.15 cM corresponding to 710.27-712.56 Mb falling within the inverted ***-three high-confidence genes were annotated in the interval using the Chinese Spring reference genome,with six identified as potential candidates for YR86 based on genome and transcriptome *** results will accelerate map-based cloning of YR86 and its deployment in wheat breeding.

关键词： Adult-plant resistance Chromosomal inversion Puccinia striiformis Triticum aestivum

Genome-wide linkage mapping of QTL for adult-plant resistance to stripe rust in a wheat recombinant inbred line population MX169/Centrum

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Genome-wide linkage mapping of QTL for adult-plant resistanc...

第八届全国小麦基因组学及分子育种大会

作者： Jingmei Mu Qilin Wang Jianhui Wu Lili Huang Zhensheng Kang dejun han State Key Laboratory of Crop Stress Biology for Arid Areas Northwest A&F University College of Agronomy Northwest A&F University College of Plant Protection Northwest A&F University

Stripe rust caused by Puccinia striiformis Westend.f *** Erikss.,is one of the most damaging diseases of wheat(Triticum aestivum) *** combination of several,additively-acting partial disease resistance genes has been proposed as a suitable strategy to breed wheat cultivars with high levels of durable field *** German winter wheat cultivar Centrum performed near immunity to stripe rust at adult plant since it was introduced into *** determine the inheritance of the APR resistance in this cultivar,151 F2:7 recombinant inbred lines(RILs) were devebped from a cross between MX169 and Centrum The RILs were evaluated for maximum disease severity(MDS) in three sites during the 2015-2016 and 2016-2017 cropping seasons,providing data for six *** 35 K SNP(single nucleotide polymorphism) arrays were used to genotype the RILs and their *** Composite interval mapping(ICIM) detected five QTL,namely ***-1 AL,***-4 AL,***-4 BS,***-7 BL,***-7 DS,*** except ***-4 BS and ***-7 DS contributed by MX169,***-lAL,***-4 AL and ***-7 BL contributed by Centrum performed stable resistance in all *** ***-7 BL explained an average 15.2-37.7%of the phenotypic variance in MDS of *** is noteworthy that ***-7 DS contributed by MX169 explained an average 17.6%of the phenotypic variance in MDS and the QTL is likely to be Yr18 through molecular marker linked with *** addition,the result is also verified that Yr18 is present in ***,MX169 with Yr18 might have a suppressor gene which suppressed the resistance of Yr18 in MX169,resulting in a complete susceptibility of *** summary,these QTL and their closely linked SNP markers,in combination with kompetitive allele specific PCR(KASP),are potentially useful for improving stripe rust resistances in wheat breeding.

关键词： Adult plant resistance QTL 35K SNP arrays Suppressor gene KASP

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土地整治农民需求层次特征及影响因素研究

农业工程学报 2015年第3期31卷 304-311页

作者：石峡朱道林张军连韩德军中国农业大学资源与环境学院北京100193

土地整治中农民有效需求是否满足是判断土地整治目标实现与否的关键。以河南省农村地区的微观调查数据作为实证,运用二项逻辑回归模型,研究土地整治农民需求层次特征及影响因素,分析结果表明:土地整治中农民需求呈现层次化、差异化特征... 详细信息

土地整治中农民有效需求是否满足是判断土地整治目标实现与否的关键。以河南省农村地区的微观调查数据作为实证,运用二项逻辑回归模型,研究土地整治农民需求层次特征及影响因素,分析结果表明:土地整治中农民需求呈现层次化、差异化特征。农民在改善生产生活条件(需求层次Ⅰ)、土地流转(需求层次Ⅱ)和参与土地整治(需求层次Ⅲ)3个需求层次上存在需求的比例分别为89.1%、36.8%和62.7%,且不同区位的、已完成和即将开展土地整治项目区的农民,其需求层次选择存在显著差异;影响农民需求层次的关键因素差异明显。其中,家庭特征变量在农民的3个需求层次回归模型(分别为模型Ⅰ、Ⅱ和Ⅲ)中都是显著的,农民认知变量在模型Ⅰ和Ⅲ中显著,个人特征和村庄特征在模型Ⅱ和Ⅲ中显著;农民对土地整治的需求逐步从单纯地改善生产生活条件向促进土地流转,并渴望通过参与行为寻求自我价值的实现等多层次需求转变。该结论为探索农民参与土地整治的行为逻辑、构建土地整治公众参与机制提供参考。

关键词：土地利用差异化模型土地整治需求层次公众参与机制河南省

农地制度创新“缓解撂荒”与“加剧非粮化”双向效应研究--以西南山区“三变”改革为例

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中国土地科学 2023年第9期37卷 73-84页

作者：韩德军闫照宋洋贵州财经大学公共管理学院贵州贵阳550025 北京大学城市与环境学院北京100871 北京大学—林肯研究院城市发展与土地政策研究中心北京100871

研究目的:探索农地制度创新--“三变”改革(资源变资产、资金变股金、农民变股东)对西南山区耕地撂荒与非粮化双向影响效应,为构建差别化的农地保护政策提供参考。研究方法:理论分析、双重差分模型。研究结果:(1)“三变”改革具有“缓... 详细信息

研究目的:探索农地制度创新--“三变”改革(资源变资产、资金变股金、农民变股东)对西南山区耕地撂荒与非粮化双向影响效应,为构建差别化的农地保护政策提供参考。研究方法:理论分析、双重差分模型。研究结果:(1)“三变”改革具有“缓解撂荒”和“加剧非粮化”的双向效应,二者对耕地保护作用相反但基本持平,总体上不影响粮食安全。(2)“三变”改革对改革区“缓解撂荒”和“加剧非粮化”具有持续动态影响,并随着改革深入越来越显著。(3)“三变”改革主要借助土地流转集中而推动适度规模经营、提升农业机械化水平而发展现代农业、释放农业劳动力而促进产业融合发展等多种途径改变耕地利用状态。研究结论:鼓励农地制度创新盘活撂荒耕地,以有效保护耕地。在确保粮食安全基础上,采取因地制宜措施应对耕地非粮化趋势,并在农业经营实践中通过科学政策评估有效确定耕地撂荒和非粮化的最优均衡点。

关键词：撂荒非粮化农地制度创新 “三变”改革双重差分模型