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Identification of Quantitative Trait Loci for Grain Traits in Japonica Rice

agricultural sciences in china 2010年第7期9卷 929-936页

作者： LI Mao-mao XU Lei REN Jun-fang CAO Gui-lan YU Li-qin he Hao-hua HAN Long-zhi Kohhee-jong institute of crop sciences Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement （NFCRI） Beijing 100081 P.R. China College of Agronomy Jiangxi Agricultural University Nanchang 330045 P.R.China Rice Research institute Jiangxi Academy of Agricultural Sciences Nanchang 330200 P.R.China School of Plant science College of Agriculture and Life Science Seoul National University Seoul 151-921 Korea

Quantitative trait loci（QTLs） of grain traits were detected to provide theoretical basis for fine mapping and molecular marker-assisted breeding of grain traits in japonica *** an F2 population including 200 individuals derived from a cross combination between two japonica rice DL115 with large grain and XL005 with small grain,the grain length,grain width,grain thickness,ratio of grain length to width and 1 000-grain weight were evaluated in beijing;and the quantitative trait loci for above five grain traits were identified by composite interval mapping using SSR *** results showed that the five grain traits exhibited a normal continuous distribution in F2 population,indicating they were quantitative traits controlled by multiple genes.A total of 16 QTLs conferring the five grain traits were detected on chromosomes 2,3,5 and 12,*** QTLs,namely qGL3a,qGW2,qGW5,qGT2,qRLW2,qRLW3,qGWT2 and qGWT3,were major QTLs and explained 15.42,40.89,13.54,33.43,13.82,13.61,12.51 and 10.1% of the observed phenotypic variance,*** them,qGW2,qGT2,qRLW2 and qGWT2 were mapped in same interval RM12776-RM324 on chromosome *** marker interval RM12776-RM324 on chromosome 2 was common marker intervals of four major QTLs,and the two SSR markers RM12776 and RM324 would be used in molecular markerassisted breeding in japonica *** modes of gene action were mainly additive and partial *** QTLs＇ alleles were derived from small grain parent XL005,and other 12 QTLs＇ alleles were derived from large grain parent *** alleles from larger parent were showed significant effects to grain length,grain width,grain thickness and 1 000-grain weight.

关键词： japonica rice drain trait SSR marker quantitative trait locus gene action

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Identification of the genetic locus associated with the crinkled leaf phenotype in a soybean(Glycine max L.)mutant by BSA-Seq technology

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Journal of Integrative Agriculture 2022年第12期21卷 3524-3539页

作者： Kingsley OCHAR SU Bo-hong ZHOU Ming-ming LIU Zhang-xiong GAO Hua-wei Sobhi FLAMLOM qiu Li-juan national key facility for crop gene resources and genetic improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081P.R.China College of Agriculture Northeast Agricultural University/Key Laboratory of Soybean BiologyMinistry of EducationHarbin 150030P.R.China School of Agriculture Yangtze UniversityJingzhou 434025P.R.China Plant Production Department Faculty of Agriculture Saba BashaAlexandria UniversityAlexandria 21531Egypt

The leaf is the main photosynthetic organ of plants,and it plays a significant role in the yield of crop *** the causal mutations and candidate genes that underlie leaf phenotypic variation is an important breeding target in soybean grain yield *** ethyl methyl sulfonate(EMS)-induced soybean mutant DWARFCRINKLEDLEAF1(DCL1)with an aberrant crinkled leaf phenotype was identified in the background of the soybean cultivar Zhongpin 661(Zp661).We constructed an F2 segregating population from a cross between Zp661 and DCL1 in order to investigate the genomic locus associated with the crinkled leaf *** bulk segregant analysis(BSA)combined with the whole-genome resequencing method,the Euclidean distance(ED)correlation algorithm detected 12 candidate genomic regions with a total length of 20.32 Mb that were linked to the target *** a comparative analysis of the sequence data for the wild-type and mutant pools,only one single nucleotide mutation(C:G>T:A)located on the first exon of Glyma.19G207100 was found to be associated with the *** gene validation based on a CAPS marker derived from the detected single-nucleotide polymorphism(SNP)indicated a nucleotide polymorphism between the two ***,our findings reveal that Glyma.19G207100,which is renamed as GLYCINE MAX DWARF CRINKLED LEAF 1(GmDCL1),is a promising candidate gene involved in the morphogenesis of the crinkled leaf trait of the soybean mutant *** study provides a basis for the functional validation of this gene,with prospects for soybean breeding targeting grain yield enhancement.

关键词： soybean mutant crinkled leaf BSA GmDCL1

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Identification of QTL for adult-plant resistance to powdery mildew in chinese wheat landrace Pingyuan 50

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The crop Journal 2014年第5期2卷 308-314页

作者： Muhammad Azeem Asad Bin Bai Caixia Lan Jun Yan Xianchun Xia Yong Zhang Zhonghu he institute of crop science National Wheat Improvement Center/The National Key Facility for Crop Gene Resources and Genetic ImprovementChinese Academy of Agricultural Sciences (CAAS) Wheat Research institute Gansu Academy of Agricultural Sciences Cotton Research institute Chinese Academy of Agricultural Sciences (CAAS) International Maize and Wheat improvement Center (CIMMYT) China Office c/o CAAS

Powdery mildew caused by Blumeria graminis f. sp. tritici is one of the major wheat diseases worldwide. The chinese wheat landrace Pingyuan 50 has shown adult-plant resistance(APR)to powdery mildew in the field for over 60 years. To dissect the genetic basis of APR to powdery mildew in this cultivar, a mapping population of 137 double haploid(DH) lines derived from Pingyuan 50/Mingxian 169 was evaluated in replicated field trials for two years in beijing(2009–2010 and 2010–2011) and one year in Anyang(2009–2010). A total of 540 polymorphic SSR markers were genotyped on the entire population for construction of a linkage map and QTL analysis. Three QTL were mapped on chromosomes 2BS(***-2BS.2), 3BS(***-3BS),and 5AL(***-5AL) with the resistance alleles contributed by Pingyuan 50 explaining 5.3%,10.2%, and 9.1% of the phenotypic variances, respectively, and one QTL on chromosome 3BL(***-3BL) derived from Mingxian 169 accounting for 18.1% of the phenotypic ***-3BS, ***-3BL, and ***-5AL appear to be new powdery mildew APR ***-2BS.2 and ***-5AL are possibly pleiotropic or closely linked resistance loci to stripe rust resistance QTL. Pingyuan 50 could be a potential genetic resource to facilitate breeding for improved APR to both powdery mildew and stripe rust.

关键词： Triticum aestivum L Blumeria graminis f.sp.tritici Disease resistance Quantitative trait loci

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Mechanisms and molecular approaches for heat tolerance in rice (Oryza sativa L.) under climate change scenario

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Journal of Integrative Agriculture 2018年第4期17卷 726-738页

作者： Syed Adeel Zafar Amjad Hameed Muhammad Amjad Nawaz MA wei Mehmood All Noor Muzammil Hussain Mehboob-ur-Rahman national key facility for crop gene resources and genetic improvement/institute of crop sciences Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China Nuclear institute for Agriculture and Biology (NIAB) Faisalabad 38000 Pakistan Department of Biotechnology College of Engineering Science Chonnam National University Chonnam 59626 Republic of Korea institute of crop sciences Chinese Academy of Agricultural Sciences~Key Laboratory of Crop Physiology and Ecology Ministryof Agriculture Beijing 100081 P.R.China State key Laboratory of Mycology/institute of Microbiology Chinese Academy of Sciences Beijing 100101 P.R. China Plant Genomics & Molecular Breeding Laboratories National Institute for Biotechnology and Genetic Engineering (NIBGE)Faisalabad 38000 Pakistan

Rice, a staple cereal crop in many parts of the world, has been confronted with multiple environmental stresses including high temperature, negatively impacts the booting as well as anthesis growth stages. The situation is further complicated by the changing climatic conditions, resulting in gradual escalation of temperature as well as changing the rainfall pattern and frequency, thus raising a concern of food security worldwide. The situation can be combat by developing rice varieties with excellent genetics with improved morpho-physiological, biochemical, and molecular mechanisms, together can minimize the adverse effects of heat stress. here, several strategies(encompassing genetic and genomic, and mechanisms involved) for mitigating the impact of high temperature on rice have been discussed. Finally, the utilization of genomic knowledge in augmenting the conventional breeding approaches have been comprehensively elaborated to develop heat tolerant germplasm.

关键词： heat stress rice climate change molecular markers heat stress responses

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Dissection of heterosis for yield and related traits using populations derived from introgression lines in rice

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The crop Journal 2016年第6期4卷 468-478页

作者： Chao Xiang Hongjun Zhang Hui Wang Shaobo wei Binying Fu Jiafa Xia Zefu Li Yongming Gao Guoyou Ye institute of crop sciences/national key facility for crop gene resources and genetic improvement Chinese Academy of Agricultural Sciences Rice Research institute Anhui Academy of Agricultural Sciences genetics and Biotechnology Division International Rice Research Institute

Despite the great success achieved by the exploitation of heterosis in rice,the genetic basis of heterosis is still not well *** adopted an advanced-backcross breeding strategy to dissect the genetic basis of heterosis for yield and eight related *** testcross(TC) populations with 228 testcross F1 combinations were developed by crossing57 introgression lines with four types of widely used male sterile lines using a North Carolina II mating *** of variance indicated that the effects of testcross F1 combinations and their parents were significant or highly significant for most of the traits in both years,and all interaction effects with year were significant for most of the *** midparent heterosis(HMP) was observed for most traits in the four TC populations in the two *** relative HMPlevels for most traits varied from highly negative to highly ***-two dominant-effect QTL were identified for HMPof the nine traits in the four TC populations in the two *** these,22 QTL were also identified for the performance of testcross *** dominant-effect QTL could individually explain more than 10% of the phenotypic *** QTL clusters were observed including the region surrounding the RM9–RM297 region on chromosome 1,the RM110–RM279–RM8–RM5699–RM452 region on chromosome 2,the RM5463 locus on chromosome 6 and the RM1146–RM147 region on chromosome *** identified QTL for heterosis provide valuable information for dissecting the genetic basis of heterosis.

关键词： Rice Yield and related traits Introgression lines heterosis Quantitative trait loci

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A cryptic inhibitor of cytokinin phosphorelay controls rice grain size

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Molecular Plant 2022年第2期15卷 293-307页

作者： Dapu Liu he Zhao Yunhua Xiao Guoxia Zhang Shouyun Cao Wenchao Yin Yangwen Qian Yanhai Yin Jinsong Zhang Shouyi Chen Chengcai Chu Hongning Tong national key facility for crop gene resources and genetic improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China State key Laboratory of Plant Genomics Institute of Genetics and Developmental Biologythe Innovative Academy for Seed DesignChinese Academy of SciencesBeijing 100101China Biogle Genome Editing Center ChangzhouJiangsu Province 213125China Department of genetics Development and Cell BiologyIowa State UniversityAmesIA 50011USA

Plant hormone cytokinin signals through histidine-aspartic acid(H-D)phosphorelay to regulate plant growth and *** it is well known that the phosphorelay involves histidine kinases,histidine phosphotransfer proteins(HPs),and response regulators(RRs),how this process is regulated by external components remains *** we demonstrate that protein phosphatase with kelch-like domains(PPKL1),known as a signaling component of steroid hormone brassinosteroid,is actually a cryptic inhibitor of cytokinin phosphorelay in rice(Oryza sativa).Mutation at a specific amino acid D364 of PPKL1 activates cytokinin response and thus enlarges grain size in a semi-dominant mutant named *** of PPKL1 containing D364,either with the deletion of the phosphatase domain or not,rescues the s48 mutant ***1 interacts with OsAHP2,one of authentic HPs,and D364 resides in a region resembling the receiver domain of ***,PPKL1 can utilize D364 to suppress OsAHP2-to-RR phosphorelay,whereas mutation of D364 abolishes the *** function of PPKL1 is independent of the phosphatase domain that is required for brassinosteroid ***,editing of the D364-residential region produces a diversity of semi-dominant mutations associated with variously increased grain *** screening of the edited plants enables the identification of two genotypes that confer significantly improved grain ***,our study uncovers a noncanonical cytokinin signaling suppressor and provides a robust tool for seed rational design.

关键词： cytokinin brassinosteroid grain size signaling PPKL1 rice

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Cloning and Characterization of genes Coding for Fructan Biosynthesis Enzymes (FBEs) in Triticeae Plants

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agricultural sciences in china 2010年第3期9卷 313-324页

作者： GAO Xiang She Mao-yun YIN Gui-xiang YU Yang QIAO wei-hua DU Li-pu YE Xing-guo national key facility of crop gene resources and genetic improvement Key Laboratory of Crop Genetics and Breeding Ministry of Agriculture/Institute of Crop Sciences Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China Biotechnology Research institute Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China

Fructan is not only a carbon source for storage but also plays an important role as anti-stress agents in many plant species. Complex fructans having both β-（2,1）- and β-（2,6）-linked fructosyl units accumulate in Triticeae plants commonly. Three enzymes （sucrose： sucrose 1-fructosyltransferase, 1-SST, EC： 2.***.1.99; sucrose： fructan 6-fructosyltransferase, 6- SFT, EC： 2.***.1.10; and fructan： fructan 1-fructosyltransferase, 1-FFT, EC： 2.***.1.100） were involved in fructan biosynthesis in Triticeae plant species. We successfully isolated these genes from tetraploid wheat （Triticum turgidum, genotype： AABB）, common wheat （Triticum aestivum L., genotype： AABBDD） and three wild relatives of common wheat, Triticum urartu Thum. （the origin of the AA genome）, Aegilops speltoides （Tausch） Gren. （the putative source of the SS genome） and Aegilops tauschii Coss. （the source of the DD genome）. Sequence analysis revealed that all the FBEs （fructan biosynthetic enzymes） had three highly conserved functional motifs except 1-SST （EU981912） from tetraploid wheat species only with conserved DPNG. Low pI （isoelectric point） and potential N-glycosylation sites were predicted, which were crucial for protein compartmentation and post-translational process. Analysis on subcelluar localization signals showed that only 6-SFT had vacuolar-directed signal. Sequences alignment result showed that 1-SST and 1-FFT were more conservative and had closer relationship each other, while 6-SFT was more active during the evolution processing. According to the syntenic relationship between wheat and rice genome, FBEs were predicated to be located on the homeologous group 6 and group 2 chromosomes. Expression profile confirmed that expression of all the three FBEs were drought-stress induced. This study can assist to establish a useful theoretical platform for cold- or drought-tolerant improvement of wheat by modulating FBEs expression.

关键词： fructans fructan biosynthesis enzymes gene structure wheat evolution

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TabHLH95-TaNF-YB1 module promotes grain starch synthesis in bread wheat

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Journal of genetics and Genomics 2023年第11期50卷 883-894页

作者： Yunchuan Liu wei Xi Xiaolu Wang Huifang Li Hongxia Liu Tian Li Jian Hou Xu Liu Chenyang Hao Xueyong Zhang key Laboratory of crop gene resources and Germplasm Enhancement Ministry of Agriculture and Rural Affairs/The National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China State key Laboratory of Aridland crop science(Gansu agricultural University)/Gansu Provincial key Laboratory of crop improvement&Germplasm Enhancement LanzhouGansu 730070China College of Agronomy Gansu Agricultural UniversityLanzhouGansu 730070China

Starch is the most abundant substance in wheat(Triticum aestivum L.)endosperm and provides the major carbohydrate energy for human daily *** synthesis-related(SSR)genes are believed to be spatiotemporally specific,but their transcriptional regulation remains unclear in ***,we investigate the role of the basic helix-loop-helix(bHLH)transcription factor TabHLH95 in starch ***95 is preferentially expressed in the developing grains in wheat and encodes a nucleus localized protein without autoactivation *** Tabhlh95 knockout mutants display smaller grain size and less starch content than wild type,whereas overexpression of TabHLH95 enhances starch accumulation and significantly improves thousand grain *** analysis reveals that the expression of multiple SSR genes is significantly reduced in the Tabhlh95 ***95 binds to the promoters of ADP-glucose pyrophosphorylase large subunit 1(AGPL1-1D/-1B),AGPL2-5D,and isoamylase(ISA1-7D)and enhances their ***,TabHLH95 interacts with the nuclear factor Y(NF-Y)family transcription factor TaNF-YB1,thereby synergistically regulating starch *** results suggest that the TabHLH95-TaNF-YB1 complex positively modulates starch synthesis and grain weight by regulating the expression of a subset of SSR genes,thus providing a good potential approach for genetic improvement of grain productivity in wheat.

关键词： Starch synthesis TabHLH95-TaNF-YB1 module Synergistic regulation Grain weight Wheat

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The soybean PLATZ transcription factor GmPLATZ17 suppresses drought tolerance by interfering with stress-associated gene regulation of GmDREB5

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The crop Journal 2022年第4期10卷 1014-1025页

作者： Juanying Zhao Lei Zheng Jitong wei Yixuan Wang Jun Chen Yongbin Zhou Ming Chen Fengzhi Wang Youzhi Ma Zhao-Shi Xu institute of crop sciences Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic ImprovementKey Laboratory of Biology and Genetic Improvement of Triticeae CropsMinistry of AgricultureBeijing 100081China hebei key Laboratory of crop Salt-alkali Stress Tolerance Evaluation and genetic improvement/Cangzhou academy of Agriculture and Forestry sciences Cangzhou 061000HebeiChina

Plant AT-rich sequence and zinc binding(PLATZ)transcription factors are a class of plant specific zincdependent DNA-binding proteins that function in abiotic stress response and plant *** this study,31 GmPLATZ genes were identified in ***17 was down-regulated by drought and exogenous abscisic *** Arabidopsis and soybean hairy roots overexpressing GmPLATZ17 showed drought sensitivity and inhibition of stress-associated gene *** contrast,suppressed expression of GmPLATZ17 led to increased drought tolerance in transgenic soybean hairy *** GmPLATZ17 protein was verified to interact physically with the GmDREB5 transcription factor,and overexpression of GmDREB5 increased drought tolerance in soybean hairy *** of GmPLATZ17 with GmDREB5 was shown to interfere with the DRE-binding activity of GmDREB5,suppressing downstream stress-associated gene *** results show that GmPLATZ17 inhibits drought tolerance by interacting with *** study sheds light on PLATZ transcription factors and the function of GmPLATZ17 in regulating drought sensitivity.

关键词： Soybean PLATZ transcription factor Protein interaction Regulation mechanism Drought response

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Genomic footprints of wheat evolution in china reflected by a Wheat660K SNP array

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The crop Journal 2021年第1期9卷 29-41页

作者： Zhiwei Wang Chenyang Hao Jing Zhao Chang Li Chengzhi Jiao wei Xi Jian Hou Tian Li Hongxia Liu Xueyong Zhang key Laboratory of crop gene resources and Germplasm Enhancement Ministry of Agriculture and Rural Affairs/The National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China Novogene Bioinformatics institute Beijing 100083China

Common wheat(Triticum aestiuum L.)is one of the most important crops because it provides about 20%of the total calories for *** is an excellent modern species for studying concerted evolution of sub-genomes in polyploid species,because of its large chromosome size and three well-known genome *** of common wheat genome reference sequence and development of high-density SNP chips provide an excellent foundation to answer questions of wheat evolution and breeding at the genomic *** genotyping more than 600 accessions of common wheat and their diploid and tetraploid ancestors using a Wheat660 K SNP array,we found dramatic genome changes due to tetraploidization and hexaploidization,in contrast to weaker influences of domestication and breeding on ***,since common wheat was introduced in china in 1500 BCE,chinese landraces formed two subgroups(***-L1 and ***-L2)with considerably diverse geographic distributions and agronomic ***-L2,mainly distributed in central and east china is found to have more but smaller oval grains with early maturity *** found that variation and selection in intergenic regions of the A and B sub-genomes dominated this differentiation,in which chromosomes 7 A and 3 B took the leading roles due to the existence of putative genes related to defense responses and environmental adaption in the highly differentiated *** haplotype blocks were detected on 3 B(232.6-398.3 Mb)and 7 A(211.7-272.9 Mb)in the landraces,forming two distinct haplotypes,*** discovered that artificial crosses in breeding promoted recombination in the whole genome,however,this recombination and differentiation was highly asymmetric among the three sub-genomes in homoeologous *** addition,we found that the wide use of European and northern American cultivars in breeding at early era,led dramatic changes in chinese wheat genome,whereas,the recent breeding functioned to

关键词： Wheat Polyploidization Differentiation Asymmetric recombination Haplotype block

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