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Genetic dissection and validation of a major QTL for grain weight on chromosome 3B in bread wheat(Triticum aestivum L.) 被引量:2
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作者 Simin Liao zhibin xu +7 位作者 Xiaoli Fan Qiang Zhou Xiaofeng Liu Cheng Jiang Liangen Chen Dian Lin Bo Feng Tao Wang 《Journal of Integrative Agriculture》 SCIE CSCD 2024年第1期77-92,共16页
Grain weight is one of the key components of wheat(Triticum aestivum L.)yield.Genetic manipulation of grain weight is an efficient approach for improving yield potential in breeding programs.A recombinant inbred line(... Grain weight is one of the key components of wheat(Triticum aestivum L.)yield.Genetic manipulation of grain weight is an efficient approach for improving yield potential in breeding programs.A recombinant inbred line(RIL)population derived from a cross between W7268 and Chuanyu 12(CY12)was employed to detect quantitative trait loci(QTLs)for thousand-grain weight(TGW),grain length(GL),grain width(GW),and the ratio of grain length to width(GLW)in six environments.Seven major QTLs,QGl.cib-2D,QGw.cib-2D,QGw.cib-3B,QGw.cib-4B.1,QGlw.cib-2D.1,QTgw.cib-2D.1 and QTgw.cib-3B.1,were consistently identified in at least four environments and the best linear unbiased estimation(BLUE)datasets,and they explained 2.61 to 34.85%of the phenotypic variance.Significant interactions were detected between the two major TGW QTLs and three major GW loci.In addition,QTgw.cib-3B.1 and QGw.cib-3B were co-located,and the improved TGW at this locus was contributed by GW.Unlike other loci,QTgw.cib-3B.1/QGw.cib-3B had no effect on grain number per spike(GNS).They were further validated in advanced lines using Kompetitive Allele Specific PCR(KASP)markers,and a comparison analysis indicated that QTgw.cib-3B.1/QGw.cib-3B is likely a novel locus.Six haplotypes were identified in the region of this QTL and their distribution frequencies varied between the landraces and cultivars.According to gene annotation,spatial expression patterns,ortholog analysis and sequence variation,the candidate gene of QTgw.cib-3B.1/QGw.cib-3B was predicted.Collectively,the major QTLs and KASP markers reported here provide valuable information for elucidating the genetic architecture of grain weight and for molecular marker-assisted breeding in grain yield improvement. 展开更多
关键词 thousand-grain weight QTL mapping haplotype analysis candidate gene
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Identification and validation of major QTL for grain size and weight in bread wheat(Triticum aestivum L.) 被引量:2
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作者 Guangsi Ji zhibin xu +7 位作者 Xiaoli Fan Qiang Zhou Liangen Chen Qin Yu Simin Liao Cheng Jiang Bo Feng Tao Wang 《The Crop Journal》 SCIE CSCD 2023年第2期564-572,共9页
Grain size and weight are key components of wheat yield.Exploitation of major underlying quantitative trait loci(QTL)can improve yield potential in wheat breeding.A recombinant inbred line(RIL)population was construct... Grain size and weight are key components of wheat yield.Exploitation of major underlying quantitative trait loci(QTL)can improve yield potential in wheat breeding.A recombinant inbred line(RIL)population was constructed to detect QTL for thousand-grain weight(TGW),grain length(GL)and grain width(GW)across eight environments.Genomic regions associated with grain size and grain weight were identified on chromosomes 4A and 6A using bulked segregant exome sequencing(BSE-Seq)analysis.After constructing genetic maps,six major QTL detected in at least four individual environments and in best linear unbiased estimator(BLUE)datasets,explained 7.50%-23.45%of the phenotypic variation.Except for QGl.cib-4A,the other five QTL were co-located in two regions,namely QTgw/Gw.cib-4A and QTgw/Gw/Gl.cib-6A.Interactions of these QTL were analyzed.Unlike QTgw/Gw/Gl.cib-6A,QTgw/Gw.cib-4A and QGl.cib-4A had no effect on grain number per spike(GNS).The QTL were validated in a second cross using Kompetitive Allele Specific PCR(KASP)markers.Since QTgw/Gw.cib-4A was probably a novel locus,it and the KASP markers reported here can be used in wheat breeding.TraesCS4A03G0191200 was predicted to be potential candidate gene for QTgw/Gw.cib-4A based on the sequence differences,spatiotemporal expression patterns,gene annotation and haplotype analysis.Our findings will be useful for fine mapping and for marker-assisted selection in wheat grain yield improvement. 展开更多
关键词 BSE-Seq Thousand-grain weight Grain length Grain width QTL mapping
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In-situ formation of hierarchical solid-electrolyte interphase for ultra-long cycling of aqueous zinc-ion batteries 被引量:2
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作者 Shaojie Zhang Jiajia Ye +5 位作者 Huaisheng Ao Mingying Zhang Xilong Li zhibin xu Zhiguo Hou Yitai Qian 《Nano Research》 SCIE EI CSCD 2023年第1期449-457,共9页
Aqueous rechargeable zinc ion batteries have received widespread attention due to their high energy density and low cost.However,zinc metal anodes face fatal dendrite growth and detrimental side reactions,which affect... Aqueous rechargeable zinc ion batteries have received widespread attention due to their high energy density and low cost.However,zinc metal anodes face fatal dendrite growth and detrimental side reactions,which affect the cycle stability and practical application of zinc ion batteries.Here,an in-situ formed hierarchical solid-electrolyte interphase composed of InF3,In,and ZnF2 layers with outside-in orientation on the Zn anode(denoted as Zn@InF3)is developed by a sample InF3 coating.The inner ultrathin ZnF2 interface between Zn anode and InF3 layer formed by the spontaneous galvanic replacement reaction between InF3 and Zn,is conductive to achieving uniform Zn deposition and inhibits the growth of Zinc dendrites due to the high electrical resistivity and Zn2+conductivity.Meanwhile,the middle uniformly generated metallic In and outside InF3 layers functioning as corrosion inhibitor suppressing the side reaction due to the waterproof surfaces,good chemical inactivity,and high hydrogen evolution overpotential.Besides,the as-prepared zinc anode enables dendrite-free Zn plating/stripping for more than 6,000 h at nearly 100%coulombic efficiency(CE).Furthermore,coupled with the MnO2 cathode,the full battery exhibits the long cycle of up to 1,000 cycles with a low negative-to-positive electrode capacity(N/P)ratio of 2.8. 展开更多
关键词 zinc ion batteries solid-electrolyte interphase in-situ formation hierarchical coating
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Generalization of the Hall-Petch and inverse Hall-Petch behaviors by tuning amorphous regions in 2D solids
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作者 zhibin xu Mengmeng Li +1 位作者 Huijun Zhang Yilong Han 《National Science Open》 2023年第3期83-94,共12页
The strengthσ_(y)(D)of a polycrystal can decrease or increase with the grain diameter D,i.e.,the famous Hall-Petch(HP)and inverse-Hall-Petch(IHP)behaviors,respectively.However,σ_(y)(D)under thick grain boundaries(GB... The strengthσ_(y)(D)of a polycrystal can decrease or increase with the grain diameter D,i.e.,the famous Hall-Petch(HP)and inverse-Hall-Petch(IHP)behaviors,respectively.However,σ_(y)(D)under thick grain boundaries(GBs)(i.e.,GB thickness l>1 particle)andσ_(y)(l)have rarely been explored.Here we measure them by systematically varying D and l of two-dimensional glass-crystal composites in simulations.We demonstrate that increasing l and decreasing D have similar effects on reducing dislocation motions and promoting GB deformations.Consequently,the classical HP-IHP behaviors ofσ_(y)(D,l=1)and our generalized HP-IHP behaviors ofσ_(y)(D,l)share similar mechanisms and can be unified asσ_(y)(AGB/Atot),where AGB/Atot is the fraction of the amorphous region.The results reveal a way to exceed the maximum strength of normal polycrystals.The generalized HP-IHP behaviors ofσ_(y)(D,l)should be similar in 2D and 3D,except that the HP effect in 3D is stronger. 展开更多
关键词 POLYCRYSTAL amorphous solid crystal-glass crossover Hall-Petch strengthening inverse Hall-Petch weakening
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带辅助协变量的相关失效时间数据的加权估计伪部分似然方法
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作者 焦雨领 刘妍岩 +1 位作者 石跃勇 徐志斌 《中国科学:数学》 CSCD 北大核心 2021年第7期1191-1212,共22页
本文在不同基准风险边际模型下考虑带辅助协变量的相关失效时间数据的统计推断.假设感兴趣的主协变量仅在全研究队列的一个子集中是精确测量的,而主协变量的辅助协变量则对研究队列的全部个体均可获得.首先利用辅助信息经验地估计相对... 本文在不同基准风险边际模型下考虑带辅助协变量的相关失效时间数据的统计推断.假设感兴趣的主协变量仅在全研究队列的一个子集中是精确测量的,而主协变量的辅助协变量则对研究队列的全部个体均可获得.首先利用辅助信息经验地估计相对风险函数,然后提出一种加权估计伪部分似然(weighted estimated pseudo-partial likelihood,WEPPL)方法求边际风险率参数的估计.本文在辅助协变量为分类变量的情形下建立WEPPL估计的渐近性质.相应估计被证明是相合的和渐近正态的.本文通过模拟研究评估提出的估计在有限样本下的表现.结果显示提出的加权估计在效率上要优于未加权的估计,特别是当失效时间之间相关性较强的时候. 展开更多
关键词 辅助协变量 相关失效时间 估计方程 边际风险模型 有效集样本 加权估计伪部分似然
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A biomass based photonic crystal made of "konjac tofu" 被引量:1
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作者 Wenxin Zhang Min xue +5 位作者 Kenneth J.Shea Lili Qiu zhibin xu Jing Fan Dan Yan Zihui Meng 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第1期587-590,共4页
Konjac tofu is a traditional Chinese food whose main ingredient is the water-soluble polysaccharide from konjac tubers-konjac glucomannan(KGM).Herein we report an interpenetrating double network polymeric film by cros... Konjac tofu is a traditional Chinese food whose main ingredient is the water-soluble polysaccharide from konjac tubers-konjac glucomannan(KGM).Herein we report an interpenetrating double network polymeric film by crosslinking KGM and polyvinyl alcohol(PVA) with glutaraldehyde under acidic conditions.PVA was introduced into the hydrogel system as a hard skeleton,which not only maintained the biocompatibility of KGM,but also gave the hydrogel superior mechanical properties and solvent resistance.Implanting a colloidal array inside the above film,we obtained a new type of biomass based photonic crystal that is sensitive to a variety of physical and chemical stimulus,especially for methanol.This photonic crystal responds to metha nol and methanol vapo r,and has the ability to detect methanol in gasoline,which has a good application prospect. 展开更多
关键词 Photonic crystals Konjac glucomannan HYDROGEL Interpenetrating double network Sensor
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Large-scale preparation of black phosphorus by molten salt method for energy storage 被引量:2
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作者 Shaojie Zhang Zili Qin +3 位作者 Zhiguo Hou Jiajia Ye zhibin xu Yitai Qian 《ChemPhysMater》 2022年第1期1-5,共5页
Black phosphorus(BP)is a new layered material in concept,which has attracted great interest due to its fascinat-ing optical and electrochemical properties.Here,we report the large scale synthesis of BP(20 g)by reducin... Black phosphorus(BP)is a new layered material in concept,which has attracted great interest due to its fascinat-ing optical and electrochemical properties.Here,we report the large scale synthesis of BP(20 g)by reducing PCl 5 with metallic Al in melt AlCl 3 at 300°C.X-ray diffraction indicates the orthorhombic structure of BP and Raman spectrum shows that there is no obvious impurities.BP samples consist of micron-sized clusters of about 2μm aggregated by flake-like nanoparticles with 20-100 nm.When used as anode materials for lithium ion battery,it exhibits a high specific capacity of 1610 m Ah g−1 at a current density of 0.1C,and cycle life up to 1000 cycles at a current density of 5C.In addition,through gradient centrifugation of as-prepared BP samples,gram-scale BP quantum dots can be obtained. 展开更多
关键词 Black phosphorus Quantum dots Lithium ion battery Molten salt-thermal Chemical synthesis
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