检索结果-南通市图书馆

Genomic mosaicism due to homoeologous exchange generates extensive phenotypic diversity in nascent allopolyploids

National Science Review 2021年第5期8卷 23-37页

作者： Ying Wu Fan Lin Yao Zhou Jie Wang Shuai Sun Bin Wang Zhibin Zhang Guo Li Xiuyun Lin Xutong Wang Yue Sun Qianli Dong Chunming Xu Lei Gong Jonathan F.Wendel Zhiwu Zhang Bao Liu Key Laboratory of Molecular Epigenetics of the Ministry of Education Northeast Normal University department of crop & soil sciences Washington State University Brightseed Inc. department of Ecology Evolution& Organismal BiologyIowa State University

Allopolyploidy is an important process in plant speciation, yet newly formed allopolyploid species typically suffer from extreme genetic bottlenecks. One escape from this impasse might be homoeologous meiotic pairing, during which homoeologous exchanges(HEs) generate phenotypically variable progeny. However,the immediate genome-wide patterns and resulting phenotypic diversity generated by HEs remain largely unknown. Here, we analyzed the genome composition of 202 phenotyped euploid segmental allopolyploid individuals from the fourth selfed generation following chromosomal doubling of reciprocal F1 hybrids of crosses between rice subspecies, using whole-genome sequencing. We describe rampant occurrence of HEs that, by overcoming incompatibility or conferring superiority of hetero-cytonuclear interactions, generate extensive and individualized genomic mosaicism across the analyzed tetraploids. We show that the resulting homoeolog copy number alteration in tetraploids affects known-function genes and their complex genetic interactions, in the process creating extraordinary phenotypic diversity at the population level following a single initial hybridization. Our results illuminate the immediate genomic landscapes possible in a tetraploid genomic environment, and underscore HE as an important mechanism that fuels rapid phenotypic diversification accompanying the initial stages of allopolyploid evolution.

关键词： nascent allopolyploidy homoeologous recombination phenotypic diversity plant evolution GWAS dosage effects epistasis

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Influence of metal ions on sulfonamide antibiotics biochemical behavior in fiber coexisting system

引用

Journal of Environmental sciences 2019年第6期31卷 267-276页

作者： Lan Zhang Ruihuan Chen Yun Liu Youjun Deng Zhongpei Li Yuanhua Dong Key Laboratory of soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences university of Chinese Academy of sciences department of soil and crop sciences Texas A&M University

Metal ions and fiber are common compounds in the livestock and poultry manure,which will affect the fate of organic compounds in aqueous environment. However,limited research has addressed the effect of coexisting metal ions and fiber on the biodegradation of sulfonamide antibiotics. Accordingly, a compositing study was performed to assess the effect of metal ions(Fe3+and Cu2+) on the biodegradation of sulfadimethoxine sodium salt(SDM) in the presence of fiber. The enhanced adsorption of SDM onto fiber in the presence of metal ions can be attributed to the π+–π electron donor acceptor(EDA) interaction. The microbial(Phanerochaete chrysosprium) could easily attach onto fiber forming attached microbial, and the degradation rates of SDM of immobilized bacteria in the presence of Fe3 +were 100%, which were significantly higher than those of free bacteria(45%). This study indicates that Fe3 +and fiber could enhance the biodegradation of SDM. Fiber acts as adsorbent, carrier, and substrate which enhanced the removal of SDM.

关键词： Adsorption mechanism Co-biodegradation Luffa fiber White-rot fungus

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

控制西美圆柏数量对美国俄勒冈州中部生态系统氮储量的影响

引用

Journal of Plant Ecology 2021年第6期14卷 1073-1089页

作者： Mohamed A.B.Abdallah Ricardo Mata-González Jay S.Noller Carlos G.Ochoa department of Animal and Rangeland sciences Oregon State UniversityCorvallisOR 97331USA department of crop and soil Science Oregon State UniversityCorvallisOR 97331USA

在美国俄勒冈州,控制西美圆柏(Juniperus occidentalis)的数量是一种公认的牧场管理措施,该做法有助于恢复蒿草草原(sagebrush steppe)生境,该生境对野生动物和家畜都十分重要。然而,尽管控制木本植物数量会对当地的流域管理和区域性氮... 详细信息

在美国俄勒冈州,控制西美圆柏(Juniperus occidentalis)的数量是一种公认的牧场管理措施,该做法有助于恢复蒿草草原(sagebrush steppe)生境,该生境对野生动物和家畜都十分重要。然而,尽管控制木本植物数量会对当地的流域管理和区域性氮库造成重要影响,但砍伐西美圆柏对生态系统中氮元素的影响问题尚未得到很好的解决。本文定量研究了两个相邻流域生态系统中的氮储量,其中一个流域经过处理(流域内的大部分圆柏已被清除掉),而另一个流域未处理(圆柏未被清除)。在圆柏被移除13年后,我们测定了两个流域里圆柏树林、灌木丛、草丛和枯枝落叶层的地上氮储量,以及两个流域中两个土层(0–25和25–50 cm)内的地下氮储量(根系和土壤氮储量)。研究结果表明,未处理流域的地上氮储量是处理流域的6.9倍,因为未处理流域的地上生物量要大得多。然而,由于砍伐圆柏导致林下植被的根系生物量增加,所以处理流域的根系氮储量是未处理流域的3.1倍。0–25和25–50 cm土层氮储量没有受到圆柏砍伐的影响。总体而言,生态系统总氮储量在处理流域(9536 kg N ha−1)和未处理流域(9456 kg N ha−1)之间并没有显著差异。在两个流域里,生态系统中最大的氮积累量(至少95%的生态系统总氮量)均存在于地下(0–25 cm深的土壤以及根系)。这项研究证明,清除圆柏并不会显著影响生态系统的储氮能力。

关键词：地上氮储量地下氮储量生态系统氮西美圆柏(Juniperus occidentalis) 土壤氮木本植物入侵

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Establishment of Beauveria bassiana as a fungal endophyte in potato plants and its virulence against potato tuber moth, Phthorimaea operculella (Lepidoptera: Gelechiidae)

引用

Insect Science 2023年第1期30卷 197-207页

作者： Meng-Di Zhang Sheng-Yong Wu Jun-Jie Yan Stuart Reitz Yu-Lin Gao state Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBejingChina department of crop and soil sciences Malheur Experiment StationOregon State UniversityOntarioORUSA National Center of Excellence for Tuber and Root crop Research Chinese Academy of Agricultural SciencesBeijingChina

The potato tuber moth,Phthorimaea operculella,is the most damaging potato pest in the world and is difficult to control as the larvae are internal feeders in the foliage and tubers.Entomopathogenic fungi that colonize plants as endophytes have lethal and sublethal pathological effects on insect pests.We show that Beauveria bassiana colonizes the aerial parts of potato plants endophytically after inoculation through soil drenching.Endophytic B.bassiana persisted in potato foliage for more than 50 days postinoculation.Bioassays indicated that foliage of B.bassiana-inoculated potato plants were pathogenic against larvae of P operculella.Sublethal experiments indicated that B.bassiana negatively affected the growth,development,and reproduction of P operculella.Development experiments showed that the weight of P.operculella pupae reared on B.bassianacolonized potato plants(4.25 mg)was significantly less than that of those reared on uninoculated control plants(8.89mg).Compared with newly eclosed larvaefed on control plants,those fed on B.bassiana-inoculated plants had significantly lower survivorship,with only 17.8%developing to the adult stage.Oviposition of P operculella females reared on B.bassiana endophytically colonized plants was significantly lower(35 eggs/female)than of those reared on uninoculated plants(115 eggs/female).This study demonstrates that endophytic B.bassiana can be a potential biological control agent for the control and management of P operculella.Comparing pupal weights of P operculella reared on potato plants inoculated with the B.bassiana strain GZGY-1-3 and on untreated control plants,pupae from the control plants were significantly heavier than those from treated plants.

关键词： Beauveria bassiana biological control colonization Phthorimaea operculella

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Natural variants and editing events provide insights into routes for spike architecture modification in common wheat

引用

The crop Journal 2023年第1期11卷 148-156页

作者： Min Fan Xiaoyu Zhang Ragupathi Nagarajan Wenxuan Zhai Yahya Rauf Haiyan Jia Zhengqiang Ma Liuling Yan crop Genomics and Bioinformatics Center and National Key Laboratory of crop Genetics and Germplasm Enhancement Nanjing Agricultural UniversityJiangsuNanjing 210095JiangsuChina department of Plant and soil sciences Oklahoma State UniversityStillwaterOK 74078USA

Spike architecture is an indicative trait of grain yield in common wheat(Triticum aestivum).A segregating population was generated for mapping genes contributing to spike morphometric traits by crossing the two common wheat cultivars'CItr 17600'with branching spikes and'Yangmai 18'with normal spikes.A major quantitative trait locus for spike length was mapped to the Q5A region of chromosome 5A.Yangmai18 carried a Q5Ab allele for short spikes,which harbored one SNP in the last intron,and a 1-bp InDel in the 720-bp fragment from the start codon,compared to Q5Aa in Chinese Spring.CItr 17600 harbored a q5Ab allele for long spikes,which has a 6-bp deletion compared to the reported q5Aa allele that was involved in the binding site of microRNA 172(miR172).This 6-bp deletion in immediately upstream of this binding site was involved in changes of four amino acids.The natural q5A allele appeared to be rare in common wheat but frequent in tetraploid T.turgidum accessions with branching spikes.The CRISPR/Cas9 technology was used to edit the upstream region involving in the miR172 binding site in Yangmai 18 and identified two independent editing events,one with a 1-bp insertion in Q5A and the other with a 2-bp deletion in Q5D,resulting in several shapes of spikes in the transgenic progeny.In addition to the effects of natural q5A allele and the edited Q5A genes,this study indicated the regeneratability and transformability of Yangmai 18 as an elite cultivar.Altogether,this study provides insight into future modification and engineering of spike architecture in common wheat.

关键词： Q gene Spike shape miR172 Gene editing Wheat

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Genome Assembly of Alfalfa Cultivar Zhongmu-4 and Identification of SNPs Associated with Agronomic Traits

引用

Genomics, Proteomics & Bioinformatics 2022年第1期20卷 14-28页

作者： Ruicai Long Fan Zhang Zhiwu Zhang Mingna Li Lin Chen Xue Wang Wenwen Liu Tiejun Zhang Long-Xi Yu Fei He Xueqian Jiang Xijiang Yang Changfu Yang Zhen Wang Junmei Kang Qingchuan Yang Institute of Animal sciences Chinese Academy of Agricultural SciencesBeijing 100193China department of crop and soil sciences Washington State UniversityPullmanWA 99163USA School of Grassland Science Beijing Forestry UniversityBeijing 100083China United states department of Agriculture-Agricultural Research Service Plant and Germplasm Introduction and Testing ResearchProsserWA 99350USA

Alfalfa(Medicago sativa L.)is the most important legume forage crop worldwide with high nutritional value and yield.For a long time,the breeding of alfalfa was hampered by lacking reliable information on the autotetraploid genome and molecular markers linked to important agronomic traits.We herein reported the de novo assembly of the allele-aware chromosome-level genome of Zhongmu-4,a cultivar widely cultivated in China,and a comprehensive database of genomic variations based on resequencing of 220 germplasms.Approximate 2.74 Gb contigs(N50 of 2.06 Mb),accounting for 88.39%of the estimated genome,were assembled,and 2.56 Gb contigs were anchored to 32 pseudo-chromosomes.A total of 34,922 allelic genes were identified from the allele-aware genome.We observed the expansion of gene families,especially those related to the nitrogen metabolism,and the increase of repetitive elements including transposable elements,which probably resulted in the increase of Zhongmu-4 genome compared with Medicago truncatula.Population structure analysis revealed that the accessions from Asia and South America had relatively lower genetic diversity than those from Europe,suggesting that geography may influence alfalfa genetic divergence during local adaption.Genome-wide association studies identified 101 single nucleotide polymorphisms(SNPs)associated with 27 agronomic traits.Two candidate genes were predicted to be correlated with fall dormancy and salt response.We believe that the alleleaware chromosome-level genome sequence of Zhongmu-4 combined with the resequencing data of the diverse alfalfa germplasms will facilitate genetic research and genomics-assisted breeding in variety improvement of alfalfa.

关键词： Alfalfa Autotetraploid Genome assembly Resequencing Genome-wide association study

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Laboratory vs. Field Calibration of HydraSCOUT Probes for soil Water Measurement

引用

Pedosphere 2019年第1期29卷 132-136页

作者： Cinisani M.TFWALA Leon D.van RENSBURG Zaid A.BELLO Pieter C.ZIETSMAN department of soil Crop & Climate Sciences University of the Free State department of Botany National Museum(South Africa) Centre for Environmental Management University of the Free State

Dear Editor,Accurate measurement of volumetric soil water content(θ_v)is essential for efficient soil water management.HydraSCOUT(HS)probes are capacitance-type probes forθ_v measurement with high accuracy,but requi... 详细信息

关键词： Field Calibration of HydraSCOUT Probes for soil Water Measurement Laboratory vs

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

GAPIT Version 3: Boosting Power and Accuracy for Genomic Association and Prediction

引用

Genomics, Proteomics & Bioinformatics 2021年第4期19卷 629-640页

作者： Jiabo Wang Zhiwu Zhang Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Sichuan Province and Ministry of EducationSouthwest Minzu UniversityChengdu 610041China department of crop and soil sciences Washington State UniversityPullmanWA 99164USA

Genome-wide association study(GWAS)and genomic prediction/selection(GP/GS)are the two essential enterprises in genomic research.Due to the great magnitude and complexity of genomic and phenotypic data,analytical methods and their associated software packages are frequently advanced.GAPIT is a widely-used genomic association and prediction integrated tool as an R package.The first version was released to the public in 2012 with the implementation of the general linear model(GLM),mixed linear model(MLM),compressed MLM(CMLM),and genomic best linear unbiased prediction(g BLUP).The second version was released in 2016 with several new implementations,including enriched CMLM(ECMLM)and settlement of MLMs under progressively exclusive relationship(SUPER).All the GWAS methods are based on the single-locus test.For the first time,in the current release of GAPIT,version 3 implemented three multi-locus test methods,including multiple loci mixed model(MLMM),fixed and random model circulating probability unification(Farm CPU),and Bayesian-information and linkage-disequilibrium iteratively nested keyway(BLINK).Additionally,two GP/GS methods were implemented based on CMLM(named compressed BLUP;c BLUP)and SUPER(named SUPER BLUP;s BLUP).These new implementations not only boost statistical power for GWAS and prediction accuracy for GP/GS,but also improve computing speed and increase the capacity to analyze big genomic data.Here,we document the current upgrade of GAPIT by describing the selection of the recently developed methods,their implementations,and potential impact.All documents,including source code,user manual,demo data,and tutorials,are freely available at the GAPIT website(http://***/GAPIT).

关键词： GWAS Genomic selection Software R GAPIT

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Applying plant-based irrigation scheduling to assess water use efficiency of cotton following a high-biomass rye cover crop

引用

Journal of Cotton Research 2020年第2期3卷 134-145页

作者： MEEKS Calvin D SNIDER John L CULPEPPER Stanley HAWKINS Gary Division of Plant sciences University of MissouriPortagevilleMO 63873USA department of crop and soil sciences University of GeorgiaTiftonGA 31793USA department of crop and soil sciences University of GeorgiaWatkinsvilleGA 30677USA.

Background:This study addressed the potential of combining a high biomass rye winter cover crop with predawn leaf water potential(ΨPD)irrigation thresholds to increase agricultural water use efficiency(WUE)in cotton.To this end,a study was conducted near Tifton,Georgia under a manually-controlled,variable-rate lateral irrigation system using a Scholander pressure chamber approach to measure leaf water potential and impose varying irrigation scheduling treatments during the growing season.ΨPDthresholds were-0.4 MPa(T1),-0.5 MPa(T2),and-0.7 MPa(T3).A winter rye cover crop or conventional tillage were utilized for T1-T3 as well.Results:Reductions in irrigation of up to 10%were noted in this study for the driest threshold(-0.7 MPa)with no reduction in lint yield relative to the-0.4 MPa and-0.5 MPa thresholds.Drier conditions during flowering(2014)limited plant growth and node production,hastened cutout,and decreased yield and WUE relative to 2015.Conclusions:We conclude thatΨPDirrigation thresholds between-0.5 MPa and-0.7 MPa appear to be viable for use in aΨPDscheduling system with adequate yield and WUE for cotton production in the southeastern U.S.Rye cover positively impacted water potential at certain points throughout the growing season but not yield or WUE indicating the potential for rye cover crops to improve water use efficiency should be tested under longer-term production scenarios.

关键词： Cotton Irrigation management Water use efficiency Cover crops Cotton sustainability

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Isolation and molecular characterization of entomopathogenic nematode,Heterorhabditis sp.from an arable land in Nigeria

引用

Journal of Integrative Agriculture 2021年第10期20卷 2706-2715页

作者： Fisayo Y.DARAMOLA Osarenkhoe O.OSEMWEGIE Stephen O.OWA Samuel B.ORISAJO Evbuomwan IKPONMWOSA Elizabeth T.ALORI department of Microbiology Landmark UniversityOmu Aran 370102Kwara StateNigeria crop Protection Division Cocoa Research Institute of NigeriaIbadan 200257Oyo StateNigeria department of crop and soil sciences Landmark UniversityOmu Aran 370102Kwara StateNigeria

The occurrence of entomopathogenic nematodes(EPNs)in arable soil samples from Nigeria was investigated using Baermann extraction tray and insect-bait(White’s trap)techniques.Isolates were tested for infectivity using the larvae of Galleria mellonella(greater moth)and Tenebrio molitor(mealworm).The study revealed a new species of Heterorhabditis(MT371593)in soil samples that were randomly collected from an arable farmland cultivated with cassava TMS-30572 at the Teaching and Research Farm of Landmark university,Nigeria.Amplification of the internal transcribed spacer region(ITS)of the ribosomal DNA produced a nucleotide sequence of 933 base pairs(bp).A BLASTN search of GenBank showed that the sequence of the Nigerian isolate is identical at 99%similarity to that of Heterorhabditis sp.from Thailand.Infectivity test of the isolate showed 100%mortality against T.molitor larvae within 48 h of exposure while only 80%mortality was recorded for G.mellonella after 1 week of exposure.This is the first account of Heterorhabditis sp.in Nigeria.The varying degrees of infectivity against mealworm and greater moth observed in this study proved that the Nigerian isolate of Heterorhabditis sp.could potentially be an attractive option in the management of insect pests of cash crops.

关键词： biological control EPNs Heterorhabditis sp. ribosomal DNA Tenebrio molitor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：