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Identification of a new stripe rust resistance gene in Chinese winter wheat Zhongmai 175

Journal of Integrative Agriculture 2016年第11期15卷 2461-2468页

作者： LU Jia-ling CHEN Can LIU Peng HE Zhong-hu xia xian-chun National Wheat Improvement Center/Institute of Crop Sciences Chinese Academy of Agricultural Sciences (CAAS) Beijing 100081 P.R.China College of Agronomy Anhui Agricultural University Hefei 230036 P.R. China International Maize and Wheat Improvement Center (CIMMYT) China Office Beijing 100081 P.R. China

Stripe rust is a serious foliar disease posing a grave threat to wheat production worldwide. The most economical and environmentally friendly way to control this disease is to breed and deploy resistant cultivars. Zhongmai 175 is an elite winter wheat cultivar conferring resistance to a broad spectrum of Puccinia striiformis f. sp. tritici（Pst） races. To identify the resistance gene in the cultivar, genetic analysis was conducted using the parents, F1, F2 and F2：3 populations derived from the cross of Lunxuan 987/Zhongmai 175. Segregations in the F2 and F2：3 populations indicated a single dominant gene conferring resistance to stripe rust in Zhongmai 175, temporarily designated Yr ZM175. Bulked segregant analysis（BSA） with wheat i Select 90 K SNP array determined a preliminary location of Yr ZM175. Subsequently, Yr ZM175 was mapped on chromosome 2AS using simple sequence repeats（SSR）, expressed sequence tags（EST） and newly-developed kompetitive allele specific PCR（KASP） markers, being flanked by Xgwm636 and Xwmc382 at genetic distances of 4.9 and 8.1 c M, respectively. Comparison of reaction patterns of Yr ZM175 on 23 Pst races or isolates and pedigree analysis with other genes on chromosome 2AS suggested that it is likely to be a new gene for resistance to stripe rust. The resistance gene and linked molecular markers will be useful in wheat breeding targeting for the improvement of stripe rust resistance.

关键词： molecular markers Puccinia striiformis SSR SNP Triticum aestivum

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Identification of genetic loci for grain yield-related traits in the wheat population Zhongmai 578/Jimai 22

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Journal of Integrative Agriculture 2023年第7期22卷 1985-1999页

作者： LIU Dan ZHAO De-hui ZENG Jian-qi Rabiu Sani SHAWAI TONG Jing-yang LI Ming LI Fa-ji ZHOU Shuo HU Wen-li xia xian-chun TIAN Yu-bing ZHU Qian WANG chun-ping WANG De-sen HE Zhong-hu LIU Jin-dong ZHANG Yong Institute of Crop Sciences National Wheat Improvement CenterChinese Academy of Agricultural Sciences(CAAS)Beijing 100081P.R.China College of Agriculture Henan University of Science&TechnologyLuoyang 471000P.R.China Department of Crop Science Faculty of Agriculture and Agricultural TechnologyAliko Dangote University of Science and Technology WudilKano 713281Nigeria Crop Research Institute Shandong Academy of Agricultural SciencesJinan 250100P.R.China Institute of Biotechnology and Food Science Hebei Academy of Agriculture and Forestry SciencesShijiazhuang 050051P.R.China Gaoyi Stock Seed Station Shijiazhuang 053110P.R.China Shangqiu Academy of Agricultural and Forestry Sciences Shangqiu 476000P.R.China International Maize and Wheat Improvement Center(CIMMYT) China Officec/o CAASBeijing 100081P.R.China Agricultural Genomics Institute at Shenzhen Chinese Academy of Agricultural SciencesShenzhen 518120P.R.China

The identification of stable quantitative trait locus(QTL)for yield-related traits and tightly linked molecular markers is important for improving wheat grain yield.In the present study,six yield-related traits in a recombinant inbred line(RIL)population derived from the Zhongmai 578/Jimai 22 cross were phenotyped in five environments.The parents and 262 RILs were genotyped using the wheat 50K single nucleotide polymorphism(SNP)array.A high-density genetic map was constructed with 1501 non-redundant bin markers,spanning 2384.95 cM.Fifty-three QTLs for six yield-related traits were mapped on chromosomes 1D(2),2A(9),2B(6),2D,3A(2),3B(2),4A(5),4D,5B(8),5D(2),7A(7),7B(3)and 7D(5),which explained 2.7-25.5%of the phenotypic variances.Among the 53 QTLs,23 were detected in at least three environments,including seven for thousand-kernel weight(TKW),four for kernel length(KL),four for kernel width(KW),three for average grain filling rate(GFR),one for kernel number per spike(KNS)and four for plant height(PH).The stable QTLs QKl.caas-2A.1,QKl.caas-7D,QKw.caas-7D,QGfr.caas-2B.1,QGfr.caas-4A,QGfr.caas-7A and QPh.caas-2A.1 are likely to be new loci.Six QTL-rich regions on 2A,2B,4A,5B,7A and 7D,showed pleiotropic effects on various yield traits.TaSus2-2B and WAPO-A1 are potential candidate genes for the pleiotropic regions on 2B and 7A,respectively.The pleiotropic QTL on 7D for TKW,KL,KW and PH was verified in a natural population.The results of this study enrich our knowledge of the genetic basis underlying yield-related traits and provide molecular markers for high-yield wheat breeding.

关键词： grain yield KASP marker QTL mapping SNP chip

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Cloning of TaCYP707A1 Gene that Encodes ABA 8′-Hydroxylase in Common Wheat (Triticum aestivum L.)

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Agricultural Sciences in China 2009年第8期8卷 902-909页

作者： ZHANG chun-li HE Xin-yao HE Zhong-hu WANG Lin-hai xia xian-chun Institute of Crop Sciences Chinese Academy of Agricultural Sciences （CAAS）/National Wheat Improvement Center/The National Key Facility for Crop Gene Resources and Genetic Improvement Beijing 100081 P.R.China Crop Research Institute Heilongjiang Academy of Agricultural Sciences Harbin 150086 P.R. China International Maize and Wheat Improvement Center （CIMMYT） China Office c/o CAAS Beijing 100081 P.R. China

The plant hormone abscisic acid （ABA） regulates many important physiological and developmental processes in plants. The objective of this study was to clone the ABA 8′-hydroxylase gene in common wheat. In the present study, we used the eDNA sequence of barley HvCYP707A1 gene （GenBank accession no. AB239299） as a probe for BLAST search against the common wheat （Triticum aestivum L.） EST database in GenBank. All wheat ESTs sharing high similarity with the reference gene were subjected to contig assembly. Primers were designed based on the constructed contigs to clone the wheat CYP707A1 gene, designated as TaCYP707A1. The genomic DNA sequence of TaCYPTO7A1 gene comprised five exons and four introns, with a size of 2225 bp. The corresponding cDNA sequence of TaCYP707A1 was 1737 bp, containing an open reading frame （ORF） of 1431 bp, a 42-bp 5′-untranslated region （UTR） and a 264-bp 3′UTR, with 94.9% of identical sequences to HvCYP707A1 gene （AB239299）. The neighbor joining tree indicated that the deduced amino acid sequences of TaCYP707A1 gene was highly similar to those of barley and rice. The TaCYP707A1 gene was located on chromosome 6BL using a set of Chinese Spring nullisomic-tetrasomic lines and ditelosomic line 6BS. These results will be of high importance in understanding of molecular mechanism of ABA catabolism.

关键词： Triticum aestivum L. homeologous cloning CYP707A1 gene ABA 8′-hydroxylase

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QTL Mapping for Adult Plant Resistance to Powdery Mildew in Italian Wheat cv. Strampelli

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Journal of Integrative Agriculture 2013年第5期12卷 756-764页

作者： Asad Muhammad Azeem BAI Bin LAN Cai-xia YAN Jun xia xian-chun ZHANG Yong HE Zhong-hu National Wheat Improvement Center/National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences Chinese Academy of Agricultural Sciences(CAAS) Cotton Research Institute Chinese Academy of Agricultural Sciences(CAAS) International Maize and Wheat Improvement Center(CIMMYT) China Office

The Italian wheat cv. Strampelli displays high resistance to powdery mildew caused by Blumeria graminis f. sp. tritici. The objective of this study was to map quantitative trait loci （QTLs） for resistance to powdery mildew in a population of 249 F2：3 lines from Strampelli/Huixianhong. Adult plant powdery mildew tests were conducted over 2 yr in Beijing and 1 yr in Anyang and simple sequence repeat （SSR） markers were used for genotyping. QTLs Qpm.caas-3BS, Qpm.eaas-5BL. 1, and Qpm.caas-7DS were consistent across environments whereas, Qpm.caas-2BS. 1 found in two environments, explained 0.4-1.6, 5.5-6.9, 27.1-34.5, and 1.0-3.5% of the phenotypic variation respectively. Qpm.caas-7DS corresponded to the genomic location of Pm38/Lr34/Yr18. Qpm.caas-4BL was identified in Anyang 2010 and Beijing 2011, accounting for 1.9-3.5% of phenotypic variation. Qpm.caas-2BS. 1 and Qpm.caas-5BL. 1 contributed by Strampelli and Qpm.caas-3BS by Huixianhong, seem to be new QTL for powdery mildew resistance. Qpm.caas-4BL, Qpm.caas-5BL.3, and Qpm.caas-7DS contributed by Strampelli appeared to be in the same genomic regions as those mapped previously for stripe rust resistance in the same population, indicating that these loci conferred resistance to both stripe rust and powdery mildew. Strampelli could be a valuable genetic resource for improving durable resistance to both powdery mildew and stripe rust in wheat.

关键词： QTL analysis SSR markers Blumeria graminis durable resistance Triticum aestivum L.

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Allelic Variation at the TaZds-A1 Locus on Wheat Chromosome 2A and Development of a Functional Marker in Common Wheat

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Journal of Integrative Agriculture 2012年第7期11卷 1067-1074页

作者： DONG Chang-hai MA Zhi-ying xia xian-chun ZHANG Li-ping HE Zhong-hu College of Agronomy Agricultural University ofHebei Baoding 071001 P.R.China Institute of Crop Sciences National Wheat Improvement Center~The National Key Facility for Crop Gene Resources and Genetic Improvement Chinese Academy of Agricultural Sciences (CAAS) Beijing 100081 P.R.China CIMMYT China Office/CAAS Beijing 100081 P.R.China Beijing Engineering and Technique Research Center of Hybrid Wheat Beijing Academy of Agricultural and Forestry Sciences Beijing 100097 P.R. China

ζ （zeta）-carotene desaturase （ZDS） is a key enzyme for carotenoid biosynthesis, demonstrating high association with the yellow pigment （YP） content in wheat grain. Cloning ZDS gene and developing functional markers are important for marker-assisted selection in wheat breeding. In the present study, the full-length DNA sequence of a ZDS gene on wheat chromosome 2A, designated TaZds-A1, was cloned, with 14 exons and 13 introns, and it has an open reading frame （ORF） of 1 707 bp, encoding 568 amino acid residues. A co-dominant functional marker, YP2A-1, was designed based on the polymorphisms of two alleles at the locus, TaZds-Ala and TaZds-Alb, yielding 183- and 179-bp fragments in TaZds-Ala and TaZds-Alb genotypes, respectively. A new QTL for YP content was detected on chromosome 2A, co-segregating with the functional marker YP2A-1 and TaZds-A1; it explained 11.3% of the phenotypic variance for YP content in a doubled haploid （DH） population from Zhongyou 9507/CA9632. Among 217 Chinese wheat cultivars and advanced lines, the average grain YP content of 126 cultivars with TaZds-Alb allele was 7.8% higher than that of 91 cultivars with TaZds- Ala allele.

关键词： Triticum aestivum functional marker QTL ζ-carotene desaturase ZDS

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Characterization of TaCOMT genes associated with stem lignin content in common wheat and development of a gene-specific marker

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Journal of Integrative Agriculture 2019年第5期18卷 939-947页

作者： FU Lu-ping xiaO Yong-gui YAN Jun LIU Jin-dong WEN Wei-e ZHANG Yong xia xian-chun HE Zhong-hu National Wheat Improvement Center/Institute of Crop Sciences Chinese Academy of Agricultural Sciences Institute of Cotton Research Chinese Academy of Agricultural Sciences International Maize and Wheat Improvement Center (CIMMYT) China Office

Stem lignin content(SLC) in common wheat(Triticum aestivum L.) contributes to lodging resistance. Caffeic acid 3-O-methyltransferase(COMT) is a key enzyme involved in lignin biosynthesis. Characterization of TaCOMT genes and development of gene-specific markers could enable marker-assisted selection in wheat breeding. In the present study, the full-length genomic DNA(gDNA) sequences of TaCOMT genes located on chromosomes 3 A, 3 B, and 3 D were cloned by homologous cloning. Two allelic variants, TaCOMT-3 Ba and TaCOMT-3 Bb, were identified and differed by a 222-bp insertion/deletion(InDel) in the 3′-untranslated region(3′-UTR). A co-dominant gene-specific marker based on this InDel was developed and designated as Ta COMT-3 BM. A total of 157 wheat cultivars and advanced lines grown in four environments were used to validate the associations between allelic patterns and SLC. The SLC of cultivars with TaCOMT-3 Ba was significantly(P<0.01) higher than that of those with TaCOMT-3 Bb, and the marker TaCOMT-3 BM could be effectively used in wheat breeding.

关键词： Triticum aestivum L. caffeic acid 3-O-methyltransferase stem lignin content gene-specific marker lodging resistance

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QTL mapping of seedling biomass and root traits under different nitrogen conditions in bread wheat(Triticum aestivum L.)

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Journal of Integrative Agriculture 2021年第5期20卷 1180-1192页

作者： YANG Meng-jiao WANG Cai-rong Muhammad Adeel HASSAN WU Yu-ying xia xian-chun SHI Shu-bing xiaO Yong-gui HE Zhong-hu College of Agriculture Xinjiang Agricultural UniversityUrumqi 830052P.R.China National Wheat Improvement Centre Institute of Crop SciencesChinese Academy of Agricultural Sciences(CAAS)Beijing 100081P.R.China Institute of Agricultural Science of Yili Prefecture Yining 835000P.R.China International Maize and Wheat Improvement Centre(CIMMYT)China Office c/o CAASBeijing 100081P.R.China

Plant nitrogen assimilation and use efficiency in the seedling's root system are beneficial for adult plants in field condition for yield enhancement.Identification of the genetic basis between root traits and N uptake plays a crucial role in wheat breeding.In the present study,198 doubled haploid lines from the cross of Yangmai 16/Zhongmai 895 were used to identify quantitative trait loci(QTLs)underpinning four seedling biomass traits and five root system architecture(RSA)related traits.The plants were grown under hydroponic conditions with control,low and high N treatments(Ca(NO_(3))_(2)·4H_(2)O at 0,0.05 and 2.0 mmol L^(-1),respectively).Significant variations among the treatments and genotypes,and positive correlations between seedling biomass and RSA traits(r=0.20 to 0.98)were observed.Inclusive composite interval mapping based on a high-density map from the Wheat 660 K single nucleotide polymorphisms(SNP)array identified 51 QTLs from the three N treatments.Twelve new QTLs detected on chromosomes 1 AL(1)in the control,1 DS(2)in high N treatment,4 BL(5)in low and high N treatments,and 7 DS(3)and 7 DL(1)in low N treatments,are first reported in influencing the root and biomass related traits for N uptake.The most stable QTLs(RRS.caas-4 DS)on chromosome 4 DS,which were related to ratio of root to shoot dry weight trait,was in close proximity of the Rht-D1 gene,and it showed high phenotypic effects,explaining 13.1%of the phenotypic variance.Twenty-eight QTLs were clustered in 12 genetic regions.SNP markers tightly linked to two important QTLs clusters C10 and C11 on chromosomes 6 BL and 7 BL were converted to kompetitive allele-specific PCR(KASP)assays that underpin important traits in root development,including root dry weight,root surface area and shoot dry weight.These QTLs,clusters and KASP assays can greatly improve the efficiency of selection for root traits in wheat breeding programmes.

关键词： KASP marker QTL analysis root traits SNP array Triticum aestivum

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Mapping of Quantitative Trait Loci for Adult Plant Resistance to Stripe Rust in German Wheat Cultivar Ibis

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Journal of Integrative Agriculture 2012年第4期11卷 528-536页

作者： BAI Bin REN Yan xia xian-chun DUJiu-yuan ZHOU Gang WU Ling ZHU Hua-zhong HE Zhong-hu WANG Cheng-she State Key Laboratory of Crop Stress Biology in Arid Areas/College of Agronomy Northwest A ＆ F University Yangling 712100 P..R. China Institute of Crop Sciences National Wheat Improvement Center/The National Key Facility for Crop Gene Resources and Genetic Improvement Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China Wheat Research Institute Gansu Academy of Agricultural Sciences Lanzhou 730070 P.R.China Crop Research Institute Sichuan Academy of Agricultural Sciences Chengdu 610066 P.R.China CIMMYT China Office/Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China

The German wheat cultivar Ibis has excellent adult plant resistance（APR） to stripe rust in Gansu,a hotspot for stripe rust in China.To elucidate the genetic basis of APR to stripe rust in Ibis,237 F3 lines derived from the cross Ibis/Huixianhong were evaluated at Tianshui,Gansu,in the 2008-2009 and 2009-2010 cropping seasons,and at Chengdu,Sichuan Province,China,in the 2009-2010 cropping season.Inoculations were conducted with a mixture of several prevalent Pst races in both locations.Maximum disease severity（MDS） data showed a continuous distribution of response,indicating quantitative nature of resistance to stripe rust in Ibis.The broad-sense heritability of MDS was 0.75 based on the mean values averaged across three environments.A total of 723 simple sequence repeat（SSR） markers were used to map the QTL for APR by inclusive composite interval mapping（ICIM）.QTLs mapping to chromosomes 2BS and 6BS,designated as QYr.caas-2BS.1 and QYr.caas-6BS.1,respectively,explained 4.1-40.7% of the phenotypic variance in MDS across environments.The major effect QTL QYr.caas-2BS.1,flanked by Xgwm148 and Xwmc360,was consistently detected at all three sites as well as the averaged data over three environments,accounting for 40.7,24.2,5.2 and 29.9% of phenotypic variance,respectively.The molecular markers closely linked to this QTL have potential for use in marker-assisted selection and gene pyramiding to improve the durability of stripe rust resistance in wheat breeding.

关键词： Triticum aestivum Puccinia striiformis APR simple sequence repeat

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QTL Mapping for Adult-Plant Resistance to Stripe Rust in a Common Wheat RIL Population Derived from Chuanmai 32/Chuanyu 12

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Journal of Integrative Agriculture 2012年第11期11卷 1775-1782页

作者： WU Ling xia xian-chun ZHENG You-liang ZHANG Zheng-yu ZHU Hua-zhong LIU Yong-j ian YANG En-nian LI Shi-zhao HE Zhong-hu Crop Research Institute Sichuan Academy of Agricultural Science Chengdu 610066 P.R. China Institute of Crop Sciences National Wheat Improvement Center/The National Key Facility for Crop Gene Resources and Genetic Improvement Chinese Academy of Agricultural Sciences (CAAS) Beijing 100081 P.R.China Triticeae Research Institute Sichuan Agricultural University Chengdu 611130 P..R. China International Maize and Wheat Improvement Center (CIMMYT) China Office/Chinese Academy of Agricultural Sciences Beijing 100081 P.R China Plant Protection Institute Sichuan Academy of Agricultural Science Chengdu 610066 P.R.China College of Agriculture Siehuan Agricultural University Chengdu 611130 P.R.China

Stripe rust, caused by Puccinia striiformis f. sp. tritici, is a devastating wheat disease worldwide. The Chinese wheat cultivar Chuanmai 32 has shown stable resistance to stripe rust for 10 yr in Sichuan Province, a hotspot for stripe rust epidemics. The objective of the present study was to map quantitative trait loci （QTL） for adult-plant resistance （APR） to stripe rust in a population of 140 recombinant inbred lines （RILs） derived from Chuanmai 32/Chuanyu 12. Field trials were conducted in Chengdu and Yaan, Sichuan, from 2005 to 2008, providing stripe rust reaction data for 6 environments. 797 simple sequence repeat （SSR） markers were screened for association with stripe rust reaction, initially through bulked segregant analysis （BSA）. Based on the mean disease values averaged across environments, the broad-sense heritability of maximum disease severity （MDS） was 0.75. Two QTLs for stripe rust resistance were detected by composite interval mapping （CIM）. They were designated QYr.caas-3BL and QYr.caas-3BS and explained from 6.6 to 20.1%, respectively, of the phenotypic variance across environments. QYr.caas-3BL came from Chuanmai 32; QYr.caas-3BS with lower effect was from the susceptible parent Chuanyu 12. Both QTLs appear to be new.

关键词： APR Triticum aestivum microsatellites quanitative trait locus yellow rust

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Heteroepitaxial growth of Au@Pd core–shell nanocrystals with intrinsic chiral surfaces for enantiomeric recognition

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Rare Metals 2024年第1期43卷 225-235页

作者： Feng-xia Wu Feng-Hua Li xia-Li Lv Qi-xian Zhang Guo-Bao Xu Wen-Xin Niu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Shaoxing Institute of Technology Shanghai UniversityShaoxing 312000China University of Science and Technology of China Hefei 230026China School of Materials Science and Engineering Shanghai UniversityShanghai 200436China Zhejiang Institute of Advanced Materials Shanghai UniversityJiashan 314113China University of Chinese Academy of Sciences Beijing 100039China

Noble metal surfaces with intrinsic chirality serve as an ideal candidate for investigating enantioselective chemistry due to their superior chemical durability and high catalytic activity.Recently,significant advance has been made in synthesizing metal nanocrystals with intrinsic chirality.Nonetheless,the majority reports are limited to gold.Herein,through a heteroepitaxial growth strategy,the synthesis of metal nanocrystals with intrinsic chirality to palladium was extended for the first time and their application in enantioselective recognition was demonstrated.The heteroepitaxial growth strategy allows for transferring the chirality of homochiral Au nanocrystals to Au@Pd core–shell nanocrystals.By employing the chiral Au@Pd nanocrystals as enantiomeric recognizing elements,a series of electrochemical sensors for chiral discrimination were developed.Under optimal conditions,the peak potential between D-dihydroxyphenylalanine(D-DOPA)and L-dihydroxyphenylalanine(L-DOPA)is about 80 m V,and the peak current of D-DOPA is 2 times as much as that of L-DOPA,which enables the determination of the enantiomeric excess(EE,%)of L-DOPA.Overall,this report not only introduces a heteroepitaxial growth strategy to synthesize metal nanocrystals with intrinsic chirality,but also demonstrates the superior capability of integrating intrinsic chirality and catalytic properties into metal nanocrystals for chiral recognition.

关键词： Core–shell nanostructures Chirality transfer Electrochemical sensors Chiral recognition Chiroplasmonics

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