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Identification of a novel planthopper resistance gene from wild rice(Oryza rufipogon Griff.)

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The Crop Journal 2020年第6期8卷 1057-1070页

作者： Meng Yang Jiebin lin ling Cheng Hailian Zhou Shu Chen Fang liu rongbai li Yongfu Qiu State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources Agricultural CollegeGuangxi UniversityNanning 530005GuangxiChina College of Agriculture Yangtze UniversityJingzhou 434025HubeiChina

Rice planthoppers,including brown planthopper(BPH)and white-backed planthopper(WBPH),are the most destructive pests in Asian rice cultivation *** resistance genes that have been mapped and characterized advance our understanding of underlying resistance mechanisms and facilitate the breeding of resistant varieties,thereby contributing to an efficient pest management *** this study,a novel resistance gene Bph38 derived from the wild rice species Oryza rufipogon *** found to confer high resistance to BPH and *** mapping was performed to identify regions associated with BPH and WBPH resistance,and two mapping efforts led to the same region on chromosome 4 flanked by markers RM16563 and ***-segregant analysis and next-generation sequencing were performed using the same population to detect the resistance *** mapping narrowed the region to a 12.3-Mb segment,and fine mapping using BC1 F2 recombinants identified a 79-kb segment flanked by markers YM112 and ***-isogenic lines(NILs)carrying Bph38 in the 9311(indica)and BR54(japonica)genetic backgrounds were developed by crossing and backcrossing with marker-assisted *** agronomic traits and BPH and WBPH resistance of the NILs were similar to those of the recurrent *** feeding and host-choice tests revealed that Bph38 showed both antibiotic and antixenotic effects in both insects,with stronger effects in indica-background *** fine mapping and characterization of the major gene may result in map-based cloning of the gene and allow its application in breeding insectresistant rice varieties.

关键词： Oryza rufipogon Griff. Planthopper resistance Next-generation sequencing-based bulked-segregant analysis Gene mapping Resistance mechanism

Identification of Major Locus Bph35 Resistance to Brown Planthopper in Rice

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Rice science 2020年第3期27卷 237-245页

作者： ZHANG Yuexiong QIN Gang MA Qianqian WEI Minyi YANG Xinghai MA Zengfeng liANG Haifu liU Chi li Zhenjing liU Fang HUANG Dahui li rongbai College of Agriculture and State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources Guangxi UniversityNanning 530007China Rice Research Institute Guangxi Academy of Agricultural SciencesNanning 530007China

An introgression line RBPH660,derived from wild rice Oryza rufipogon,showed stable resistance to brown planthopper(BPH).Segregation analysis indicated BPH resistance of RBPH660 was controlled by multiple genes/*** using the bulked segregant analysis(BSA)-seq method,two genomic regions harboring QTLs resistance to BPH were identified from 1.20 to 16.70 Mb on chromosome 4 and from 10.20 to 12.60 Mb on chromosome 9 in RBPH660,respectively.A major resistance locus,designated as Bph35 accounting for 51.27%of the phenotypic variation with a LOD score of 42.51,was mapped to the candidate region of chromosome 4 between In Del(insertion-deletion)markers PSM16 and R4 *** fine mapping of Bph35,one simple sequence repeat and three newly developed In Del markers were used to screen the ***,the Bph35 locus was delimited in the region from 6.28 to 6.93 Mb and there were 18 predicted protein-encoding genes with a total of 114 non-synonymous single nucleotide polymorphism(SNP)variant sites between the resistant and susceptible *** of these genes,Os04 g0193950,encoding a putative NB-ARC(nucleotidebinding adaptor shared by APAF-1,R proteins and CED-4)and LRR(leucine-rich repeat)domain protein with nine non-synonymous SNP substitutions in its coding sequence regions,might be the candidate gene for *** findings would facilitate the map-based cloning of the Bph35 gene and development of resistant varieties against BPH in rice.

关键词： rice brown planthopper Bph35 bulked segregant analysis(BSA)-seq method gene mapping

Screening of Broad-spectrum Resistance Resources against Rice Bacterial Leaf Streak

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Plant Diseases and Pests 2017年第3期8卷 16-20页

作者： Hong Dengwei Zhao Yan Luo Dengjie Shi lijun li rongbai liu Fang College of Agriculture Guangxi University State Key Laboratory for Protection and Utilization of Subtropical Agro-bioresources

[ Objectives] Rice materials with broad-spectrum resistance against several pathogenic strains of Xanthomans oryzae pv. Oryzicola （Xooc） at multiple growth stages were screened, in order to provide reliable resistance sources for variety breeding against rice bacterial leaf streak. [ Methods] A total of 1 100 rice lines with rich genetic background were offered as selective objects, and highly susceptible cultivar Jingang 30 was used as the control. Inoculation was carried out with five strong pathogenic strains of Xooc through acupuncture method at various growth stages for resistance identification. [ Results] Fourteen disease-resistant materials were obtained through preliminary screening, accounting for 1.27% of the total materials. Nine materials moderately resistant to bacterial leaf streak were obtained via secondary screening, accounting for 0.82% of the total materials. Besides, three of them （ RL6, RL9 and RLL4） were resistant to a number of pathogenic strains of Xooc at three growth stages. In particular, RL16 presented broad-spectrum resistance to multi-strains with high resistance levels. Six of them （ RI2, RIA, RIS, RL8, RL11 and RL12） were resistant to single strain at single growth stage. [ Conclusions] The obtained three materials have broad-spectrum resistance to bacterial leaf streak at multiple growth stages, which can be served as an important source to cultivate disease-resistant rice varieties. RL6 maintains high broad-spectrum resistance at all growth stages, which can be used as a prior resistance source for rice variety breeding. Six materials obtained with resistance against bacterial leaf streak at particular growth stages can be used as candidate resistance sources.

关键词： Rice Bacterial leaf streak Broad-spectrum resistance Resistance resources

Bph36介导的抗性机制及相关信号通路的研究

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热带作物学报 2022年第5期43卷 915-922页

作者：薛艳霞李容柏中北大学山西太原030500 广西大学农学院/亚热带农业生物资源保护与利用国家重点实验室广西南宁530004

褐飞虱(Nilaparvata lugens St?l., BPH)是水稻最主要的害虫之一,给水稻生产造成严重的危害。携带不同抗性基因的抗褐飞虱水稻材料抗性机制不同,挖掘普通野生稻抗褐飞虱基因并研究其介导的抗性机制及相关信号通路对水稻育种具有重要的... 详细信息

褐飞虱(Nilaparvata lugens St?l., BPH)是水稻最主要的害虫之一,给水稻生产造成严重的危害。携带不同抗性基因的抗褐飞虱水稻材料抗性机制不同,挖掘普通野生稻抗褐飞虱基因并研究其介导的抗性机制及相关信号通路对水稻育种具有重要的意义。本研究基于课题组前期从广西普通野生稻‘W2183’挖掘出的位于4号染色体InDel标记S13和X48之间38 kb处新基因Bph36,以‘9311’和‘抗蚊青占’为感性对照,05RBPH16和NIL-Bph36为抗性对照,通过褐飞虱宿主选择性、蜜露量测定、褐飞虱存活率及褐飞虱生长速率等方法分析Bph36介导的抗褐飞虱机制;同时,以‘抗蚊青占’为感性对照,NIL-Bph36为抗性对照,通过qRT-PCR分析植物防御昆虫侵害的三大信号途径:水杨酸、茉莉酸和乙烯相关基因表达量的差异。抗性机制研究结果表明:褐飞虱在抗性材料植株上的虫口密度显著低于感性材料植株,抗性材料上的褐飞虱存活率、群体生长率及取食后排泄的蜜露量均比感性对照显著降低。Bph36介导的抗性机制是寄主抗生性和害虫趋避性相互作用的结果。qRT-PCR结果表明:褐飞虱取食后,各个时间段抗性材料NIL-Bph36植株中水杨酸合成相关基因EDS1、PAD4、PAL和水杨酸途径病程相关蛋白基因PR10的表达量显著高于感性材料‘抗蚊青占’植株中的表达量;抗性材料NIL-Bph36植株中,茉莉酸合成基因LOX2和茉莉酸积累基因AOS2的表达量比褐飞虱取食前显著提升,但是比同时段感性材料植株中表达量显著降低;褐飞虱取食后,抗、感性材料植株中乙烯信号途径基因EIN2的表达量都受到抑制,基因ACO3表达量都提高,但2种材料间的差异不显著。茉莉酸途径和乙烯途径参与了NIL-Bph36植株抗褐飞虱的基础防御反应,但Bph36激活的抗性不是茉莉酸和乙烯依赖的信号防御途径而是激活水杨酸依赖的系统获得性抗性。研究结果为进一步研究Bph36与其他抗性基因聚合,培育兼有多种抗性机制和防御信号途径的优良品种奠定基础。

关键词： Bph36 抗性机理信号通络

Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

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Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li Chen Zekun li linhai li Yuhong Tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isky Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.However,the uncontrollable dendrites growth and low coulombic efficiency hinder their practical ***,we explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,while the li3N component facilitates the transportation and reaction kinetics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling with liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,with an average cycling CE of 99.58%.

关键词： Electrolyte additive li dendrites li metal batteries liF and li3N-Rich electrode-electrolyte interphase liFePO4 cathode

Leaching kinetics of fluorine during the aluminum removal from spent li-ion battery cathode materials

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Journal of Environmental Sciences 2024年第4期138卷 312-325页

作者： Shengjie li Jianxin Zhu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

The high content of aluminum(Al)impurity in the recycled cathode powder seriously affects the extraction efficiency of Nickel,Cobalt,Manganese,and lithium resources and the actual commercial value of recycled materials,so Al removal is crucially important to conform to the industrial standard of spent li-ion battery cathode *** this work,we systematically investigated the leaching process and optimum conditions associated with Al removal from the cathode powder materials collected in a wet cathode-powder peeling and recycling production line of spent li-ion batteries(liBs).Moreover,we specifically studied the leaching of fluorine(F)synergistically happened along with the removal process of Al,which was not concerned about in other studies,but one of the key factors affecting pollution prevention in the recovery *** mechanism of the whole process including the leaching of Al and F from the cathode powder was indicated by using NMR,FTIR,and XPS,and a defluoridation process was preliminarily investigated in this *** leaching kinetics of Al could be successfully described by the shrinking core model,controlled by the diffusion process and the activation energy was 11.14 kJ/***,the leaching of F was attributed to the dissolution of liPF6and decomposition of PVDF,and the kinetics associated was described by Avrami *** interaction of Al and F is advantageous to realize the defluoridation to some *** is expected that our investigation will provide theoretical support for the large-scale recycling of spent liBs.

关键词： Al removal F leaching Cathode powder Heating alkali leaching Leaching kinetics

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水稻紫叶基因定位与性状分析

分子植物育种 2017年第12期15卷 4970-4975页

作者：周旭珍李燕骄李允振刘芳覃宝祥李容柏广西大学农学院亚热带农业生物资源保护与利用国家重点实验室南宁530004

紫叶稻因其直观的颜色表型在水稻育种工作中具有一定的用途,常用作标记性状,受到遗传研究的关注。本研究利用籼稻紫叶材料PZ10分别于粳稻品种日本晴和Sasanishiki杂交,F1后代表现为绿色,F2代绿色和紫色的分离符合3:1比例,表明紫叶表型... 详细信息

紫叶稻因其直观的颜色表型在水稻育种工作中具有一定的用途,常用作标记性状,受到遗传研究的关注。本研究利用籼稻紫叶材料PZ10分别于粳稻品种日本晴和Sasanishiki杂交,F1后代表现为绿色,F2代绿色和紫色的分离符合3:1比例,表明紫叶表型受一对隐性基因控制。对该基因进行初步的分子标记定位,发现目标基因位于第4染色体分子标记C3175和C0023之间的6.76 c M区域内;进一步设计SSR和STS引物对该基因精细定位,发现1个紧密连锁的标记C1254,该标记位于C3184与C0523之间;结果分析显示,C1254和C0523与目标的紫叶性状表现共分离,表明紫叶目标基因位于C1254~C0523区域,这个区域约0.5 c M遗传距离。研究显示,该紫叶性状表现为全生育期紫色,可作为一个完全的标记性状使用;紫稻表型株系在株高、穗长、剑叶长、千粒重、单株产量等农艺性状指标上与绿色表型植株没有显著差异,而在有效穗数、剑叶宽、每穗粒数性状与绿叶稻有显著差异,表明紫叶虽然导致产量构成因素有所改变,但对产量影响不显著;此外,紫稻和绿稻植株的光合作用没有显著的差异。

关键词：紫叶基因定位性状分析水稻

SEI/dead li-turning capacity loss for high-performance anode-free solid-state lithium batteries

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Journal of Energy Chemistry 2024年第9期96卷 145-152页

作者： Qianwen Yin Tianyu li Hongzhang Zhang Guiming Zhong Xiaofei Yang Xianfeng li Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Long-Duration and Large-Scale Energy Storage Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Laboratory of Advanced Spectro-Electrochemistry and lithium-Ion Batteries Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Anode-free solid-state lithium metal batteries(AF-SSLBs)have the potential to deliver higher energy density and improved safety beyond lithium-metal ***,the unclear mechanism for the fast capacity decay in AF-SSLBs,either determined by dead li or solid electrolyte interface(SEI),limits the proposal of effective strategies to prolong cycling *** clarify the underlying mechanism,herein,the evolution of SEI and dead li is quantitatively analyzed by a solid-state nuclear magnetic resonance(ss-NMR)technology in a typical liPF6-based polymer *** results show that the initial capacity loss is attributed to the formation of SEI,while the dead li dominates the following capacity loss and the growth rate is 0.141 mA h cm^(−2)cycle−*** reduce the active li loss,the combination of inorganic-rich SEI and self-healing electrostatic shield effect is proposed to improve the reversibility of li deposition/dissolution behavior,which reduces the capacity loss rate for the initial SEI and following dead li generation by 2.3 and 20.1 folds,*** a result,the initial Coulombic efficiency(ICE)and stable CE increase by 15.1%and 15.3%in li-Cu cells,which guides the rational design of high-performance AF-SSLBs.

关键词： Solid-state lithium batteries Solid-state NMR Anode-free SEI Dead li

High silicon enhances rice plant resistance to brown pianthopper

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High silicon enhances rice plant resistance to brown piantho...