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Mapping of powdery mildew resistance genes transferred to common wheat from wild emmer wheat revealed three functional Pm60 haplotypes

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The Crop Journal 2024年第2期12卷 540-548页

作者： Wenxin Wei Nannan Liu Shengnan Zhang Jing Zhang Wei Pan Xiaoming xie Zuhuan Yang Junna Sun Jun Ma Zhaorong Hu Weilong Guo Qiaoling Luo Jingzhong xie Fei He Yinghui Li chaojie xie Qixin Sun Key Laboratory of Crop Heterosis and Utilization(MOE)/Key Laboratory of Crop Genetic Improvement China Agricultural UniversityBeijing 100193China Institute of Advanced Agricultural Science Peking UniversityWeifang 261200ShandongChina Institute of Genetics and Developmental Biology Chinese Academy of SciencesBeijing 100101China Triticeae Research Institute Sichuan Agricultural UniversityChengdu 611130SichuanChina Institute of Evolution University of HaifaMt.CarmelHaifa 3498838Israel

Powdery mildew(PM),caused by Blumeria graminis ***(Bgt),is one of the destructive wheat diseases *** emmer wheat(Triticum turgidum ***,WEW),a tetraploid progenitor of common wheat,is a valuable genetic resource for wheat disease resistance breeding *** developed three hexaploid pre-breeding lines with PM resistance genes derived from three WEW *** resistant pre-breeding lines were crossed with susceptible common wheat *** in the F2populations were 3 resistant:1 susceptible,suggesting a single dominant allele in each resistant *** of the resistance gene in each line indicated a single locus on the long arm of chromosome 7A,at the approximate location of previously cloned Pm60 from *** sequencing revealed three different Pm60 haplotypes(Hap 3,Hap 5,and Hap 6).Co-segregating diagnostic markers were developed for identification and selection of each *** resistance function of each haplotype was verified by the virus-induced gene silencing(VIGS).Common wheat lines carrying each of these Pm60 haplotypes were resistant to most Bgt isolates and differences in the response arrays suggested allelic variation in response.

关键词： Alleles Blumeria graminus Marker-assisted selection Molecular marker Triticum dicoccoides

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Synergistic modification of the tribological properties of polytetrafluoroethylene with polyimide and boron nitride

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Friction 2021年第6期9卷 1474-1491页

作者： chaojie xie Kejian WANG College of Mechanical and Electrical Engineering Beijing University of Chemical TechnologyBeijing 100029China

Polytetrafluoroethylene(PTFE)blended with polyimide(PI)and filled with boron nitride(BN)is prepared through cold pressing and sintering for composites with remarkable wear resistance and reduced coefficient of friction(COF).The characterizations show that BN and PI at different levels,improve the hardness,dynamic thermo-mechanical modulus,thermal conductivity,and tribological properties of *** boosts the dispersion and bonding of BN in *** dry sliding friction of a block-on-ring tribometer,the wear rate and COF of 10:10:80 BN/PI/PTFE reduce to almost 1/300 and 80%of those of pure PTFE,respectively,as the wear mechanism transition from being adhesive to partially *** occurs only when the additives BN and PI induce a synergistic effect,that is,at concentrations that are not higher than ca.10 wt%and 15 wt%,*** obvious agglomeration at high percentages of added PI and severe conditions(400 N and 400 rpm)induce strong adhesive *** variations in the tensile properties,hardness,crystallization,and microstructure of the composites correspond to different *** multiple parameters of the plots of wear and friction are transformed into their contour *** mechanism transition maps aid in understanding the influence of various test conditions and composite compositions on the contact surfaces in the space-time framework of wear.

关键词： wear mechanism coefficient of friction(COF) transition map polytetrafluoroethylene(PTFE) polyimide(PI) boron nitride(BN)

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多孔质气体静压径向轴承的可压流动建模及数值求解

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排灌机械工程学报 2024年第7期42卷 701-708页

作者：顾延东杨安龙程金武谢超杰孙浩成立扬州大学水利科学与工程学院江苏扬州225009 航空工业新乡航空工业(集团)有限公司上海分公司上海201299

为研究可压流动下多孔质静压径向轴承的静特性,基于雷诺润滑方程、多孔质达西方程、气体压力-密度方程,建立了多孔质径向轴承的流动模型.提出了一种处理多孔质轴向端面压力边界条件的Laplace-Neumann虚拟节点法,结合有限差分法、松弛迭... 详细信息

为研究可压流动下多孔质静压径向轴承的静特性,基于雷诺润滑方程、多孔质达西方程、气体压力-密度方程,建立了多孔质径向轴承的流动模型.提出了一种处理多孔质轴向端面压力边界条件的Laplace-Neumann虚拟节点法,结合有限差分法、松弛迭代法、压力-密度耦合迭代法对流动模型进行数值求解.分析了可压流动下轴承半径间隙和供给压力对静压特性的影响,并与不可压流动计算结果进行对比.结果表明:在同一最小膜厚下,随着半径间隙和供给压力的增大,可压流动与不可压流动的承载能力、质量流量和功耗均增大.可压流动下的承载能力在半径间隙0.01 mm和0.03 mm下小于不可压流动,在半径间隙0.05 mm下大于不可压.可压流动下的质量流量和功耗均大于不可压流动.本研究可为多孔质静压径向轴承的设计及快速计算提供参考.

关键词：多孔质径向轴承流动建模数值求解半径间隙供给压力

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Integrated transcriptome and metabolite profiling highlights the role of benzoxazinoids in wheat resistance against Fusarium crown rot

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The Crop Journal 2022年第2期10卷 407-417页

作者： Shuonan Duan Jingjing Jin Yutian Gao Changlin Jin Junyi Mu Wenchao Zhen Qixin Sun chaojie xie Jun Ma College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China Institute of Genetics and Physiology Hebei Academy of Agriculture and Forestry SciencesShijiazhuang 050051HebeiChina College of Agronomy Hebei Agricultural UniversityBaoding 071001HebeiChina Hebei Plant Protection and Quarantine General Station Shijiazhuang 050051HebeiChina

Fusarium crown rot(FCR), caused by Fusarium spp., is a chronic and severe plant disease worldwide. In the last years, the incidence and severity of FCR in China has increased to the point that it is now considered a threat to local wheat crops. In this study, for the first time, the metabolites and transcripts responsive to FCR infection in the partial resistant wheat cultivar 04 Zhong 36(04 z36) and susceptible cultivar Xinmai 26(XM) were investigated and compared at 20 and 25 days post inoculation(dpi). A total of 443 metabolites were detected, of which 102 were significantly changed because of pathogen *** of these 102 metabolites belonged to the flavonoid, phenolic acid, amino acid and derivative *** metabolites, such as proline betaine, lauric acid, ribitol, and arabitol, were stably induced by Fusarium pseudograminearum(Fp) infection at two time points and may have important roles in FCR resistance. In line with the reduced seedling height of 04 z36 and XM plants, RNA-seq analysis revealed that FCR infection significantly affected the photosynthesis activities in two cultivars. Furthermore, 15 jasmonate ZIM-domain genes(JAZ) in the significantly enriched ‘regulation of jasmonic acid mediated signaling pathway’ in 04 z36 were down-regulated. The down-regulation of these JAZ genes in 04 z36 may cause a strong activation of the jasmonate signaling pathway. Based on combined data from gene expression and metabolite profiles, two metabolites, benzoxazolin-2-one(BOA) and 6-methoxy-benzoxazolin-2-one(MBOA), involved in the benzoxazinoid-biosynthesis pathway, were tested for their effects on FCR resistance. Both BOA and MBOA significantly reduced fungal growth in vitro and in vivo, and, thus, a higher content of BOA and MBOA in 04 z36 may contribute to FCR resistance. Above all, the current analysis extends our understanding of the molecular mechanisms of FCR resistance/susceptibility in wheat and will benefit further efforts for the genetic imp

关键词： Fusarium crown rot Wheat Metabolites Transcript Benzoxazinoid

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Transcriptome Comparison of Susceptible and Resistant Wheat in Response to Powdery Mildew Infection

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Genomics, Proteomics & Bioinformatics 2012年第2期10卷 94-106页

作者： Mingming Xin Xiangfeng Wang Huiru Peng Yingyin Yao chaojie xie Yao Han ZhongfuNi Qixin Sun State Key Laboratory for Agrobiotechnology and MOE Key Laboratory of Crop Heterosis and Utilization and MOA Key Laboratory of Crop Genomics and Genetic Improvement Beijing Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing 100193China National Plant Gene Research Centre(Beijing) Beijing 100094China School of Plant Sciences University of ArizonaTucsonAZ 85721USA

Powdery mildew （Pro） caused by the infection of Blumeria graminis f. sp. tritici （Bgt） is a worldwide crop disease resulting in significant loss of wheat yield. To profile the genes and pathways responding to the Bgt infection, here, using Affymetrix wheat microarrays, we compared the leaf transcriptomes before and after Bgt inoculation in two wheat genotypes, a Pm-susceptible cultivar Jingdong 8 （S） and its near-isogenic line （R） carrying a single Pm resistant gene Pm30. Our analysis showed that the original gene expression status in the S and R genotypes of wheat was almost identical before Bgt inoculation, since only 60 genes exhibited differential expression by P = 0.01 cutoff. However, 12 h after Bgt inoculation, 3014 and 2800 genes in the S and R genotype, respectively, responded to infec- tion. A wide range of pathways were involved, including cell wall fortification, flavonoid biosynthesis and metabolic processes. Further- more, for the first time, we show that sense-antisense pair genes might be participants in wheat-powdery mildew interaction. In addition, the results of qRT-PCR analysis on several candidate genes were consistent with the microarray data in their expression patterns. In summary, this study reveals leaf transcriptome changes before and after powdery mildew infection in wheat near-isogenic lines, suggest- ing that powdery mildew resistance is a highly complex systematic response involving a large amount of gene regulation.

关键词： Wheat Pathogen resistance Powdery mildew Microarrays

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Copy number variation of B1 controls awn length in wheat

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The Crop Journal 2023年第3期11卷 817-824页

作者： Jinlong Li Xin Xin Fangyao Sun Zhenzhen Zhu Xiangru Xu Jiatian Yang Xiaoming xie Jiazheng Yu Xiaobo Wang Sen Li Shilin Tian Baoyun Li chaojie xie Jun Ma College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China State Key Laboratory of Crop Biology College of Life SciencesShandong Agricultural UniversityTai’an 271018ShandongChina Novogene Bioinformatics Technology Co. Ltd.Beijing 100015China

Wheat awns contribute to photosynthesis and grain *** this study,an F2population and F2:3families from a cross between the awned line 7D12 and the Chinese awnless variety Shiyou 20(SY20)were used to identify loci associated with awn ***-segregant RNA sequencing and linkage mapping identified a single dominant locus in a 0.3 cM interval on chromosome *** genes were in the interval,including the recently cloned awn inhibitor *** a single copy of the B1 gene was detected in 7D12,SY20 carried five copies of the *** copy number of B1 in SY20enhanced gene *** on sequence variation among the promoter regions of five B1 gene copies in SY20,two dominant markers were developed and found to cosegregate with B1 in a population of 931 wheat *** 77 awnless accessions harbored sequence variations in the B1 promoter regions similar to those of SY20 and thus carried multiple copies of the gene,whereas 15 randomly selected awned wheats carried only one *** results suggest that an increase in copy number of the B1 gene is associated with inhibition of awn length.

关键词： Wheat Awn Awnless,B1 gene Copy number variation

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Identifying changes in the wheat kernel proteome under heat stress using iTRAQ

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The Crop Journal 2018年第6期6卷 600-610页

作者： Yufeng Zhang Hongyao Lou Dandan Guo Ruiqi Zhang Meng Su Zhenghong Hou Haiying Zhou Rongqi Liang chaojie xie Mingshan You Baoyun Li Beijing Key Laboratory of Crop Genetic Improvement/Key Laboratory of Crop Heterosis & Utilization College of Agronomy and BiotechnologyChina Agricultural University

Wheat(Triticum aestivum L.) is one of the three major global food crops. Hightemperature stress can affect its yield and quality. Studies of the effect of hightemperature stress on wheat kernel development are important because they can reveal the stability of wheat quality and lead to the genetic improvement of wheat quality traits. In this study, the isobaric tags for relative and absolute quantitation(iTRAQ)method was adopted to analyze changes in the protein expression profile of wheat cultivars under high temperature stress. The protein content of wheat grain increased under heat stress, while the SDS-sedimentation value and starch content *** filling was deficient under high temperature stress, which reduced thousandkernel weight but did not affect wheat kernel length. The 207 differentially expressed proteins identified in Gaocheng 8901 under heat stress were associated with energy metabolism, growth and development, and stress response. Gene Ontology enrichment analysis showed that the annotated proteins that were differentially expressed in Gaocheng 8901 under heat stress were involved mainly in stimulus response, abiotic stress response, stress response, and plasma membrane. A set of 78 differentially expressed proteins were assigned to 83 KEGG signaling/metabolic pathways. KEGG pathway enrichment analysis showed that this set of proteins was significantly enriched in members of 51 pathways, and the proteins participated mainly in protein synthesis in the endoplasmic reticulum, starch and sucrose metabolism, and reaction on ribosomes. Five differentially expressed proteins were involved in protein–protein interaction networks that may greatly influence the yield and quality of wheat grain. In wheat, high-temperature stress leads to a variety of effects on protein expression and may ultimately cause changes in yield and quality.

关键词： Winter wheat Heat stress GO enrichment KEGG pathway enrichment Interaction networks

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Weakly Supervised Object Localization with Background Suppression Erasing for Art Authentication and Copyright Protection

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Machine Intelligence Research 2024年第1期21卷 89-103页

作者： chaojie Wu Mingyang Li Ying Gao Xinyan xie Wing W.Y.Ng Ahmad Musyafa School of Computer Science and Engineering South China University of TechnologyGuangzhou 511442China Guangdong Provincial Key Laboratory of Artificial Intelligence in Medical Image Analysis and Application Guangdong Provincial People's HospitalGuangzhou 510180China

The problem of art forgery and infringement is becoming increasingly prominent,since diverse self-media contents with all kinds of art pieces are released on the Internet every *** art paintings,object detection and localization provide an efficient and ef-fective means of art authentication and copyright ***,the acquisition of a precise detector requires large amounts of ex-pensive pixel-level *** alleviate this,we propose a novel weakly supervised object localization(WSOL)with background su-perposition erasing(BSE),which recognizes objects with inexpensive image-level ***,integrated adversarial erasing(IAE)for vanilla convolutional neural network(CNN)dropouts the most discriminative region by leveraging high-level semantic ***,a background suppression module(BSM)limits the activation area of the IAE to the object region through a self-guidance ***,in the inference phase,we utilize the refined importance map(RIM)of middle features to obtain class-agnostic loc-alization *** experiments are conducted on paintings,CUB-200-2011 and ILSVRC to validate the effectiveness of our BSE.

关键词： Weakly supervised object localization erasing method deep learning computer vision art authentication and copyright protection

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Molecular dissection of plant height QTLs using recombinant inbred lines from hybrids between common wheat (Triticum aestivum L.) and spelt wheat (Triticum spelta L.)

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Chinese Science Bulletin 2011年第18期56卷 1897-1903页

作者： LIU Gang XU ShengBao NI ZhongFu xie chaojie QIN DanDan LI Jing LU LaHu ZHANG JinPing PENG HuiRu SUN QiXin State Key Laboratory for Agrobiotechnology College of Agronomy and Biotechnology Key Laboratory of Crop Genomics and Genetic Improvement of Ministry of Agriculture Beijing Key Laboratory of Crop Genetic Improvement Key Laboratory of Crop Heterosis Research and Utilization of Minixtry of Education China Agricultural University Beijing 100193 China

In wheat, plant height is an important agronomic trait, and a number of quantitative trait loci (QTLs) controlling plant height have been located. In this study, using the conditional and unconditional QTL mapping methods, combined with data from five different growth stages over two years of field trials, the developmental behavior for plant height in wheat was dissected. Nine unconditional QTLs and 8 conditional QTLs were identified, of which 6 were detected by both methods. None of the 11 QTLs was detected at all of the 5 investigated developmental stages, but 7 QTLs were detected at certain stages in both years. Further analysis identified 9 unconditional QTLs at different stages, which could explain the phenotypic variation from 4.81% to 17.35%. It was noteworthy that one major QTL designated QHt-4B-2, which was located on chromosome 4B, was detected on May 18 and 25 in both years, and its genetic contributions to plant height ranged from 13.42% to 16.13%. Moreover, of the 8 conditional QTLs identified, six were detected in both years, in the order of QHt-3B→QHt-4B-1→QHt-4B-2→QHt-4D→QHt-5A and QHt-2B expressed at the same developmental stage. The results indicate that QTL expression during plant height development is selective and in a temporal order.

关键词： QTL检测小麦株高普通小麦重组自交系拼写分子杂交数量性状位点

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Changes in concentrations and transcripts of plant hormones in wheat seedling roots in response to Fusarium crown rot

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作物学报:英文版 2023年第5期11卷 1441-1450页

作者： Yutian Gao Xuejun Tian Weidong Wang Xiangru Xu Yuqing Su Jiatian Yang Shuonan Duan Jinlong Li Mingming Xin Huiru Peng Qixin Sun chaojie xie Jun Ma College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China Institute of Biotechnology and Food Science Hebei Academy of Agriculture and Forestry SciencesShijiazhuang 050051HebeiChina

Fusarium crown rot(FCR) is a soilborne disease causing severe yield losses in many wheat-growing areas of the world. Diseased plants show browning and necrosis of roots and stems causing white heads at maturity. Little is known about the molecular processes employed by wheat roots to respond to the disease. We characterized morphological, transcriptional and hormonal changes in wheat seedling roots following challenge with Fusarium pseudograminearum(Fp), the main pathogen of FCR. The pathogen inhibited root development to various extents depending on plants' resistance level. Many genes responsive to FCR infection in wheat roots were enriched in plant hormone pathways. The contents of compounds involved in biosynthesis and metabolism of jasmonic acid, salicylic acid, cytokinin and auxin were drastically changed in roots at five days post-inoculation. Presoaking seeds in methyl jasmonate for 24 h promoted FCR resistance, whereas presoaking with cytokinin 6-benzylaminopurine made plants more susceptible. Overexpression of TaOPR3, a gene involved in jasmonic acid biosynthesis, enhanced plant resistance as well as root and shoot growth during infection.

关键词： Fusarium crown rot(FCR) Wheat Hormone Root TaOPR3

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