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Genetic dissection of a thousand-grain weight quantitative trait locus on rice chromosome 1

Chinese Science Bulletin 2008年第15期53卷 2326-2332页

作者： YU ShouWu YANG ChangDeng FAN YeYang ZHUANG JieYun LI XiMing State Key Laboratory of rice Science Chinese National Center for Rice Improvement China National Rice Research InstituteHangzhou 310006 China

Thousand-grain weight (TGWT) is an important factor affecting grain yield as well as grain quality in rice. A quantitative trait locus (QTL) qTGWT1-1 for TGWT was detected previously near DNA marker RG532 on the short arm of chromosome 1 in a recombinant inbred line (RIL) population derived from the indica-indica rice cross Zhengshan97B (ZS97B)/Milyang46 (MY46). In this study, two residual het-erozygous lines (RHLs), Ch1 and Ch2, derived from the ZS97B/MY46 RIL F7 population, were used to develop two F6 populations, RIL-1 and RIL-2. The genome of Ch1 and Ch2 contains a heterozygous region flanked by RM1―RM3746 and RM151―RM243 on the short arm of chromosome 1, respectively, but is homozygous in other regions. Two tightly linked QTLs, Gw1-1 and Gw1-2, with the same additive direction and similar effect on TGWT, were detected in the region of QTL qTGWT1-1 in population RIL-2. No QTL was detected in the population RIL-1. Four individual RHLs from the population RIL-2 carrying heterozygous segments flanked by RM151―RM10404, RM10381―RM243, RM10435―RM259 and RM10398―RM5359, respectively, were chosen to develop four F2 populations. Ten maternal homozy-gotes and 10 paternal homozygotes were selected from each of the four F2 populations derived from the four RHLs. The four sets of near isogenic lines (NILs) were grown for phenotyping of TGWT and delimitation of Gw1-1 and Gw1-2. Results showed that Gw1-1 and Gw1-2 were located in the intervals RM10376―RM10398 and RM10404―RM1344 which cover 392.9 and 308.5 kb regions, respectively. The enhancing alleles were from ZS97B at both loci, and no significant interactions were detected. Genetic dissection of Gw1-1 and Gw1-2 has laid a foundation for their cloning and molecular breeding of grain yield and quality in rice.

关键词：水稻遗传基因染色体线粒体 QTL

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Mechanism of inflammatory response and therapeutic effects of stem cells in ischemic stroke:current evidence and future perspectives

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Neural Regeneration Research 2025年第1期20卷 67-81页

作者： Yubo Wang Tingli Yuan Tianjie Lyu Ling Zhang Meng Wang Zhiying He Yongjun Wang Zixiao Li Vascular Neurology Department of NeurologyBeijing Tiantan HospitalCapital Medical UniversityBeijingChina china national Clinical Research center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Shanghai Engineering Research center of Stem Cells Translational Medicine ShanghaiChina national center for Healthcare Quality Management in Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Institute for Regenerative Medicine Shanghai East HospitalSchool of Life Sciences and TechnologyTongji UniversityShanghaiChina Chinese Institute for Brain Research BeijingChina Research Unit of Artificial Intelligence in Cerebrovascular Disease Chinese Academy of Medical SciencesBeijingChina Beijing Engineering Research center of Digital Healthcare for Neurological Diseases BeijingChina

Ischemic stroke is a leading cause of death and disability worldwide,with an increasing trend and tendency for onset at a younger ***,in particular,bears a high burden of stroke *** recent years,the inflammatory response after stroke has become a research hotspot:understanding the role of inflammatory response in tissue damage and repair following ischemic stroke is an important direction for its *** review summarizes several major cells involved in the inflammatory response following ischemic stroke,including microglia,neutrophils,monocytes,lymphocytes,and ***,we have also highlighted the recent progress in various treatments for ischemic stroke,particularly in the field of stem cell ***,understanding the complex interactions between inflammation and ischemic stroke can provide valuable insights for developing treatment strategies and improving patient *** cell therapy may potentially become an important component of ischemic stroke treatment.

关键词： cell therapy immune cell inflammatory ischemic stroke stem cell

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QTL Mapping for Plant Height Using Introgression Lines Derived from Zhonghui 8015 and Wild rice(Oryza rufipogon)

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rice science 2022年第6期29卷 503-506,I0002-I0006页

作者： YANG Qinqin ZHANG Yingxin XUE Pao WEN Xiaoxia LIU Ling XU Peng ZHAN Xiaodeng CAO Liyong CHENG Shihua WU Weixun china national center for rice improvement/State Key Laboratory of rice Biology China National Rice Research InstituteHangzhou 310006China Northern center of china national rice Research Institute Shuangyashan 155600China

Many excellent genes in wild rice have been lost during the domestication of wild rice to cultivated *** this study,introgression lines(ILs)were produced with a wild rice(Oryza rufipogon)accession,BJ194,as a donor parent and an indica restorer line,Zhonghui 8015(ZH8015),as a recipient parent to map QTLs for plant *** identified four QTLs(qPH3.1,qPH3.2,qPH2,and qPH8)related to plant height distributed on chromosomes 2,3 and ***,we sequenced and analyzed qPH3.2 located in the interval of RM15753-RM3525,and found this QTL may be a new locus regulating rice plant height.

关键词： Oryza cultivated Zh

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GBSS-BINDING PROTEIN,encoding a CBM48 domain-containing protein,affects rice quality and yield^∞

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Journal of Integrative Plant Biology 2020年第7期62卷 948-966页

作者： Wei Wang Xiangjin Wei Guiai Jiao Wenqiang Chen Yawen Wu Zhonghua Sheng Shikai Hu Lihong Xie Jiayu Wang Shaoqing Tang Peisong Hu rice Research Institute Shenyang Agricultural UniversityShenyang 110866China State Key Laboratory of rice Biology China National Center for Rice ImprovementChina National Rice Research InstituteHangzhou 310006China

The percentage of amylose in the endosperm of rice(Oryza sativa)largely determines grain cooking and eating ***-bound starch synthase I(GBSSI)and GBSSII are responsible for amylose biosynthesis in the endosperm and leaf,***,we identified OsGBP,a rice GBSS-binding protein that interacted with GBSSI and GBSSII in vitro and in *** total starch and amylose contents in osgbp mutants were significantly lower than those of wild type in leaves and grains,resulting in reduced grain weight and *** carbohydrate-binding module 48(CBM48)domain present in the C-terminus of OsGBP is crucial for OsGBP binding to *** the osgbp mutant,the extent of GBSSI and GBSSII binding to starch in the leaf and endospermwas significantly lower than wild *** data suggest that OsGBP plays an important role in leaf and endosperm starch biosynthesis by mediating the binding of GBSS proteins to developing starch *** elucidation of the function of OsGBP enhances our understanding of the molecular basis of starch biosyn-thesis in rice and contributes information that can be potentially used for the genetic improvement of yield and grain quality.

关键词： sativa starch cooking

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K-Domain Splicing Factor OsMADS1 Regulates Open Hull Male Sterility in rice

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rice science 2015年第5期22卷 207-216页

作者： SUN Lian-ping ZHANG Ying-xin ZHANG Pei-pei YANG Zheng-fu ZHAN Xiao-deng SHEN Xi-hong ZHANG Zhen-hua HU Xia XUAN Dan-dan WU Wei-xun LI Zi-he CAO Li-yong CHENG Shi-hua national center for rice improvement / Key Laboratory for Zhejiang Super rice Research China National Rice Research Institute College of Agronomy Shenyang Agricultural University

We identified the rice floral organ development mutant, termed as open hull and male sterile 1 （ohms1）, from the progeny of the indica restorer line Zhonghui 8015 treated with 60Co γ-ray irradiation. The ohms1 mutant exhibited an open hull and lemma- and palea-like structure conversion between the anthers and stigma, which resulted in the ohms1 mutant spikelet showing‘tridentate lemma＇. The ohms1 mutant was entirely sterile but had 60%-70% fertile pollen. Genetic analysis and gene mapping showed that ohms1 was controlled by a single recessive gene, and the mutant gene was fine-mapped to a 42-kb interval on the short arm of chromosome 3 between markers KY2 and KY29. Sequence analysis of the four open reading frames in this region revealed that the mutant carried a single nucleotide transformation （A to G） at the last base of the fifth intron, which was likely corresponded to ohms1 phynotype, in an MIKC type MADS-box gene OsMADS1 （LOC_Os03g11614）. Enzyme digestion and cDNA sequencing further indicated that the variable splicing was responsible for the deletion of the sixth exon in ohms1, but no structural changes in the MADS domain or amino acid frame shifts appeared. Additionally, real-time fluorescent quantitative PCR analysis showed that the OsMADS1 expression level decreased significantly in the ohms1 mutant. The expression levels of rice flowering factors and floral glume development-related genes also changed significantly. These results demonstrate that OsMADS1 may play an important role in rice floral organ development, particularly in floral glume development and floret primordium differentiation.

关键词： rice open hull male sterile ohms1 gene mapping alternative splicing floral organ

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Overview of in-situ oxygen production technologies for lunar resources

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 233-255页

作者： Youpeng Xu Sheng Pang Liangwei Cong Guoyu Qian Dong Wang Laishi Li Yusheng Wu Zhi Wang College of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China CAS Key Laboratory of Green Process and Engineering National Engineering Research Center for Green Recycling of Strategic Metal ResourcesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

The rich resources and unique environment of the Moon make it an ideal location for human expansion and the utilization of extraterrestrial ***,crucial for supporting human life on the Moon,can be extracted from lunar regolith,which is highly rich in oxygen and contains polymetallic *** oxygen and metal extraction can be achieved using existing metallurgical ***,the ample reserves of water ice on the Moon offer another means for oxygen *** paper offers a detailed overview of the leading technologies for achieving oxygen production on the Moon,drawing from an analysis of lunar resources and environmental *** delves into the principles,processes,advantages,and drawbacks of water-ice electrolysis,two-step oxygen production from lunar regolith,and one-step oxygen production from lunar *** two-step methods involve hydrogen reduction,carbothermal reduction,and hydrometallurgy,while the one-step methods encompass fluorination/chlorination,high-temperature decomposition,molten salt electrolysis,and molten regolith electrolysis(MOE).Following a thorough comparison of raw materials,equipment,technology,and economic viability,MOE is identified as the most promising approach for future in-situ oxygen production on the *** the corrosion characteristics of molten lunar regolith at high temperatures,along with the Moon's low-gravity environment,the development of inexpensive and stable inert anodes and electrolysis devices that can easily collect oxygen is critical for promoting MOE technology on the *** review significantly contributes to our understanding of in-situ oxygen production technologies on the Moon and supports upcoming lunar exploration initiatives.

关键词： lunar resources in-situ oxygen production space metallurgy molten lunar regolith electrolysis

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Oriented Generation of Novel Thermo-Sensitive Genic Male Sterile Lines with Improved Grain Shape and Outcrossing Rate in Early-Season rice

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rice science 2024年第2期31卷 129-133,I0001-I0016页

作者： ZHANG Huali CHEN Junyu LI Ruiqing WANG Huimei DAI Dongqing LIANG Minmin WU Mingyue MA Liangyong State Key Laboratory of rice Biology and Breeding/Chinese national center for rice improvement China National Rice Research InstituteHangzhou 310006China

Two-line hybrid rice with excellent quality is preferred in the Chinese ***,there is a trade-off between reducing costs for hybrid seed production and lowering the outcrossing rate of the sterile line,which is largely determined by the stigma exsertion rate(SER).In this study,we constructed mutants of male sterility lines with improved grain length(GL)and SER in three elite early-season indica rice varieties through targeted manipulation of the TMS5 and GS3 genes using CRISPR/Cas9-mediated multiplex *** obtained a series of marker-free gs3 single mutants and gs3tms5 double mutants with significantly higher SER,longer grains,and increased 1000-grain weight compared with the wild type(WT).Importantly,the typically thermo-sensitive genic male sterile(TGMS)trait with a higher SER was observed in gs3tms5 mutants,and their F1 hybrids exhibited remarkable improvements in grain shape and yield-related *** findings provided an efficient method to generate new valuable TGMS germplasm with improved SER through the mutagenesis of GS3 and TMS5 synergistically,and demonstrated that GS3 had pleiotropic effects on grain size,SER,and grain quality in early-season indica rice.

关键词： sterile elite season

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Genetic diversity and association mapping for salinity tolerance in Bangladeshi rice landraces

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The Crop Journal 2015年第5期3卷 440-444页

作者： Reza M.Emon Mirza M.Islam Jyotirmoy Halder Yeyang Fan Chinese national center for rice improvement/State Key Laboratory of rice Biology China National Rice Research Institute Bangladesh Institute of Nuclear Agriculture

Breeding for salinity tolerance using Bangladeshi rice landraces and understand genetic diversity has been limited by the complex and polygenic nature of salt tolerance in rice genotypes. A genetic diversity and association mapping analysis was conducted using 96 germplasm accessions with variable response to salt stress at the seedling stage. These included86 landraces and 10 indica varieties and lines including Nona Bokra, from southern Bangladesh. A total of 220 alleles were detected at 58 Simple Sequence Repeat(SSR) marker loci randomly distributed on all 12 rice chromosomes and 8 Sequence Tagged Site(STS) markers developed for genes SKC1, DST, and SalT. The average gene diversity was 0.5075 and polymorphism information content value was 0.4426, respectively. Cluster analysis revealed that 68 and 21 accessions were clustered into 2 distinct groups, possibly corresponding to indica and japonica groups, respectively and the remaining 7 landraces were classified as an admixed group. In addition to Wn11463, the STS marker for SKC1, RM22418 on Chr. 8 was significantly associated with salinity tolerance, at the location of a QTL detected in previous studies. Our findings of favorable alleles associated with salinity tolerance in Bangladeshi rice landraces, as well as the development of STS markers for salt tolerance genes, will be helpful in future efforts to breed salinity tolerance in rice.

关键词： Oryza sativa L Salinity tolerance Seedling stage S

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QTL-Seq Identified a Major QTL for Grain Length and Weight in rice Using Near Isogenic F_2 Population

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rice science 2018年第3期25卷 121-131页

作者： QIN Yaobin CHENG Peng CHENG Yichen FENG Yue HUANG Derun HUANG Tingxu SONG Xianjun YING Jiezheng State Key Laboratory of rice Biology/Chinese national center for rice improvement China National Rice Research Institute Key Laboratory of Plant Molecular Physiology/Institute of Botany the Chinese Academy of Sciences Institute of rice Research Fujian Academy of Agricultural Sciences/Fuzhou National Sub-Center for Rice Improvement

Mapping and isolation of quantitative trait loci(QTLs)or genes controlling grain size or weight is very important to uncover the molecular mechanisms of seed development and crop *** identify the QTLs controlling grain size and weight,we developed a near isogenic line F_2(NIL-F_2)population,which was derived from a residual heterozygous plant in an F_7 generation of recombinant inbred line(RIL).With the completion of more than 30×whole genome re-sequencing of the parents,two DNA bulks for large and small grains,a total of 58.94 Gb clean nucleotide data were generated.A total of455 262 single nucleotide polymorphisms(SNPs)between the parents were identified to perform bulked QTL-seq.A candidate genomic region containing SNPs strongly associated with grain length and weight was identified from 15 to 20 Mb on chromosome *** designated the major QTL in the candidate region as q ***,q TGW5.3 was further validated with PCR-based conventional QTL mapping method through developing simple sequence repeat and Insertion/Deletion markers in the F_2 ***,recombinants and the progeny tests delimited the candidate region of q TGW5.3 to 1.13 Mb,flanked by HX5009(15.15 Mb)and HX5003(16.28 Mb).A set of NILs,selected from the F_2 population,was developed to evaluate the genetic effect of q *** QTL effects were detected on grain length,grain width and 1000-grain weight of H12-29 allele with 1.14 mm,-0.11 mm and 3.11 g,which explained 99.64%,95.51%and 97.32%of the phenotypic variations,respectively.

关键词： grain length grain weight QTL-seq quantitative trait locus near-isogenic line rice single nucleotide polymorphism recombinant inbred line qTGW5.3

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Genetic Interaction of Hd1 with Ghd7, DTH8 and Hd2 Largely Determines Eco-Geographical Adaption of rice Varieties in Southern china

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rice science 2021年第2期28卷 114-118页

作者： ZHANG Zhenhua ZHU Yujun WANG Shilin FAN Yeyang ZHUANG Jieyun State Key Laboratory of rice Biology/Chinese national center for rice improvement China National Rice Research InstituteHangzhou 310006China

Although cultivated rice originated from the tropical region,a long process of domestication and human selection has enabled cultivated rice to grow in a wide range of geographical *** of photoperiodic flowering provides a foundation for this diverse *** studies have focused on elucidating how japonica varieties lost photoperiodic sensitivity(PS)to expand their cultivation areas to high latitudes,where rice is grown in a short season when day-length is long(Fujino et al,2013;Naranjo et al,2014;Gomez-Ariza et al,2015;Li et al,2015,2018;Goretti et al,2017;Ye et al,2018).By contrast,limited attention has been paid to the genetic architecture of heading date(HD)variation among varieties in middle and low *** southern china rice region,located in middle and low latitudes,occupies the most important rice cultivation region in *** region is predominantly planted with indica varieties,which presents a rich diversity of regional and seasonal *** the present study,improved varieties and landraces used in this region were analyzed for allelic variations of 12 cloned QTLs controlling HD,as well as for the genotypic effects of these genes on HD and *** objective was to clarify predominant genetic factors influencing ecogeographical adaption of rice varieties in southern china by comparing improved varieties with landraces.

关键词： cultivated planted heading

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