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棉花学报 2008年第S1期20卷 36-页

作者： SOLImAN Khairy m BOLTON James J SAHA Sukumar JENKINS Johnie N alabama a&m university normal al 35762 usda/ars crop science laboratory starkville

One of the impediments in the genetic improvement of cotton fiber is the paucity of information about genes associated with fiber *** of chromosome arm substitution line CS-

关键词： CS-B22sh Identification of Differentially Expressed Genes Associated with Cotton Fiber Development in a Chromosomal Substitution Line line

Genetic study and molecular breeding for high phosphorus use efficiency in maize

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Frontiers of Agricultural science and Engineering 2019年第4期6卷 366-379页

作者： Dongdong LI meng WANG Xianyan KUANG Wenxin LIU Key laboratory of crop Heterosis and Utilization(ministry of Education)/Beijing Key laboratory of crop Genetic Improvement/National maize Improvement Center China Agricultural UniversityBeijing 100193China Department of Biological and Environmental sciences Alabama A&M UniversityNormalAL 35762USA

Phosphorus is the second most important macronutrient after nitrogen and it has many vital functions in the life of *** soils have a low available P content,which has become a key limiting factor for increasing crop ***,low P use efficiency(PUE)of crops in conjunction with excessive application of P fertilizers has resulted in serious environmental ***,dissecting the genetic architecture of crop PUE,mining related quantitative trait loci(QTL)and using molecular breeding methods to improve high PUE germplasm are of great significance and serve as an efficient approach for the development of sustainable *** this review,molecular and phenotypic characteristics of maize inbred lines with high PUE,related QTL and genes as well as low-P responses are *** on this,a breeding strategy applying genomic selection as the core,and integrating the existing genetic information and molecular breeding techniques is proposed for breeding high PUE maize inbred lines and hybrids.

关键词： maize phosphorus use efficiency quantitative trait loci genetic study,molecular breeding genomic selection

Grain yield and N uptake of maize in response to increased plant density under reduced water and nitrogen supply conditions

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Journal of Integrative Agriculture 2024年第1期23卷 122-140页

作者： Jingui Wei Qiang Chai Wen Yin Hong Fan Yao Guo Falong Hu Zhilong Fan QimingWang State Key laboratory of Aridland crop science Lanzhou 730070China College of Agronomy Gansu Agricultural UniversityLanzhou 730070China College of Life sciences Northwest Normal UniversityLanzhou 730070China

The development of modern agriculture requires the reduction of water and chemical N fertilizer *** the planting density can maintain higher yields,but also consumes more of these restrictive ***,whether an increased maize density can compensate for the negative effects of reduced water and N supply on grain yield and N uptake in the arid irrigated areas remains *** study is part of a long-term positioning trial that started in 2016.A split-split plot field experiment of maize was implemented in the arid irrigated area of northwestern China in 2020 to *** treatments included two irrigation levels:local conventional irrigation reduced by 20%(W1,3,240 m^(3)ha^(-1))and local conventional irrigation(W2,4,050 m^(3)ha^(-1));two N application rates:local conventional N reduced by 25%(N1,270 kg ha^(-1))and local conventional N(360 kg ha^(-1));and three planting densities:local conventional density(D1,75,000 plants ha^(-1)),density increased by 30%(D2,97,500 plants ha-1),and density increased by 60%(D3,120,000 plants ha^(-1)).Our results showed that the grain yield and aboveground N accumulation of maize were lower under the reduced water and N inputs,but increasing the maize density by 30% can compensate for the reductions of grain yield and aboveground N accumulation caused by the reduced water and N *** water was reduced while the N application rate remained unchanged,increasing the planting density by 30% enhanced grain yield by 13.9% and aboveground N accumulation by 15.3%.Under reduced water and N inputs,increasing the maize density by 30% enhanced N uptake efficiency and N partial factor productivity,and it also compensated for the N harvest index and N metabolic related enzyme *** with W2N2D1,the N uptake efficiency and N partial factor productivity increased by 28.6 and 17.6%under W1N1D2.W1N2D2 had 8.4% higher N uptake efficiency and 13.9% higher N partial factor productivity than W2N2D1.W1N2D2 improv

关键词： water and N reduction plant density maize grain yield N uptake compensation effect

SPEI_(Pm)-based research on drought impact on maize yield in North China Plain

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Journal of Integrative Agriculture 2015年第4期14卷 660-669页

作者： mING Bo GUO Yin-qiao TAO Hong-bin LIU Guang-zhou LI Shao-kun WANG Pu Institute of crop science Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and EcologyMinistry of Agriculture College of Agriculture and Biotechnology China Agricultural University

The calculation method of potential evapotranspiration（PET） was improved by adopting a more reliable PET estimate based on the Penman-monteith equation into the standardized precipitation evapotranspiration index（SPEI） in this study（SPEI Pm）. This improvement increased the applicability of SPEI in North China Plain（NCP）. The historic meteorological data during 1962–2011 were used to calculate SPEI Pm. The detrended yields of maize from Hebei, Henan, Shandong, Beijing, and Tianjin provinces/cities of NCP were obtained by linear sliding average method. Then regression analysis was made to study the relationships between detrended yields and SPEI values. Different time scales were applied, and thus SPEI Pm was mentioned as SPEI Pmk-j（k=time scale, 1, 2, 3, 4,…, 24 mon; j=month, 1, 2, 3,..., 12）, among which SPEI Pm3-8 reflected the water condition from June to August, a period of heavy precipitation and vigorous growth of maize in NCP. SPEI Pm3-8 was highly correlated with detrended yield in this region, which can effectively evaluate the effect of drought on maize yield. Additionally, this relationship becomes more significant in recent 20 yr. The regression model based on the SPEI series explained 64.8% of the variability of the annual detrended yield in Beijing, 45.2% in Henan, 58.6% in Shandong, and 54.6% in Hebei. moreover, when SPEI Pm3-8 is in the range of –0.6 to 1.1, –0.9 to 0.8 and –0.8 to 2.3, the detrended yield increases in Shandong, Henan and Beijing. The yield increasing range was during normal water condition in Shandong and Henan, where precipitation was abundant. It indicated that the field management matched well with local water condition and thus allowed stable and high yield. maize yield increase in these two provinces in the future can be realized by further improving water use efficiency and enhancing the stress resistance as well as yield stability. In Hebei and Beijing, the precipitation is less and thus the normal water condition cannot meet

关键词： North China Plain maize(Zea mays L.) drought climate-determined yield standardized precipitation evapotranspiration index

Overexpression of tonoplast Ca^(2+)-ATPase in guard cells synergistically enhances stomatal opening and drought tolerance

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Journal of Integrative Plant Biology 2024年第8期66卷 1587-1602页

作者： Jinghan Su Bingqing He Peiyuan Li Baiyang Yu Qiwen Cen Lingfeng Xia Yi Jing Feibo Wu Rucha Karnik Dawei Xue michael R.Blatt Yizhou Wang Institute of crop science Zhejiang UniversityHangzhou 310058China laboratory of Plant Physiology and Biophysics University of GlasgowGlasgow G128QQUK BGI Research Sanya 572025China College of Life and Environmental sciences Hangzhou Normal UniversityHangzhou 311121China Zhejiang Provincial Key laboratory of crop Germplasm Zhejiang UniversityHangzhou 310058China

Stomata play a crucial role in plants by controlling water status and responding to drought ***,simultaneously improving stomatal opening and drought tolerance has proven to be a significant *** address this issue,we employed the OnGuard quantitative model,which accurately represents the mechanics and coordination of ion transporters in guard *** the guidance of OnGuard,we successfully engineered plants that overexpressed the main tonoplast Ca^(2+)-ATPase gene,ACA11,which promotes stomatal opening and enhances plant ***,these transgenic plants also exhibited improved drought tolerance due to reduced water loss through their ***,OnGuard assisted us in understanding the mechanism behind the unexpected stomatal behaviors observed in the ACA11 overexpressing *** study revealed that the overexpression of ACA11 facilitated the accumulation of Ca^(2+)in the vacuole,thereby influencing Ca^(2+)storage and leading to an enhanced Ca^(2+)elevation in response to abscisic *** regulatory cascade finely tunes stomatal responses,ultimately leading to enhanced drought *** findings underscore the importance of tonoplast Ca^(2+)-ATPase in manipulating stomatal behavior and improving drought ***,these results highlight the diverse functions of tonoplast-localized ACA11 in response to different conditions,emphasizing its potential for future applications in plant enhancement.

关键词： ACA11 drought guard cells modeling stomata

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

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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

Genome-wide recombination variation in biparental segregating and reciprocal backcross populations provides information for introgression breeding in Brassica napus

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The crop Journal 2023年第1期11卷 208-219页

作者： meng Wang Graham J.King Lei Shi Ruiyuan Li Yi Zhang Xiaohua Wang Jinling meng Jinxing Tu Jun Zou National Key laboratory of crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070HubeiChina Southern Cross Plant science Southern Cross UniversityPO Box 157LismoreNew South Wales 2480Australia Key laboratory of Information and Computing science of Guizhou Province Guizhou Normal UniversityGuiyang 550001GuizhouChina College of Agriculture and Forestry science Linyi UniversityLinyi 276000ShandongChina

Variation in patterns of recombination in plant genomes provides information about species evolution,genetic diversity and crop improvement. We investigated meiotic crossovers generated in biparental segregating and reciprocal backcross populations of the allopolyploid genome of rapeseed(Brassica napus)(AACC, 2n = 38). A structured set of 1445 intercrossed lines was derived from two homozygous de novo genome-assembled parents that represented the major genetic clusters of semi-winter Chinese and winter European rapeseeds, and was used to increase QTL resolution and achieve genomic reciprocal introgression. A high-density genetic map constructed with 6161 genetic bins and anchored centromere regions was used to establish the pattern of recombination variation in each chromosome. Around 93%of the genome contained crossovers at a mean rate of 3.8 c m mb^(-1), with the remaining 7% attributed to centromeres or low marker density. Recombination hotspots predominated in the A genome, including two-thirds of those associated with breeding introgression from B. rapa. Genetic background might affect recombination variation. Introgression of genetic diversity from European winter to Chinese semi-winter rapeseed showed an increase in crossover rate under the semi-winter environment. Evidence for an elevated recombination rate having historically contributed to selective trait improvement includes accumulation of favorable alleles for seed oil content on hotspots of chromosome A10. Conversely, strong artificial selection may affect recombination rate variation, as appears to be the case with a coldspot resulting from strong selection for glucosinolate alleles on A09. But the cold region would be promptly reactivated by crossing design indicated by the pedigree analysis. Knowledge of recombination hotspots and coldspots associated with QTL for 22 traits can guide selection strategies for introgression breeding between the two gene pools. These results and rich genomic resources

关键词： allopolyploid meiotic crossovers Brassica napus Historical introgression Reciprocal backcross population

Increased salinity and groundwater levels lead to degradation of the Robinia pseudoacacia forest in the Yellow River Delta

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Journal of Forestry Research 2022年第4期33卷 1233-1245页

作者： Chaoxia Lu Chen Zhao Jing Liu Kailun Li Baoshan Wang min Chen Shandong Provincial Key laboratory of Plant Stress Research College of Life ScienceShandong Normal UniversityJi’nan 250014People’s Republic of China Shandong Provincial Key laboratory of crop Genetic Improvement Ecology and PhysiologyShandong Academy of Agricultural SciencesJi’nan 250100People’s Republic of China

Forest degradation is a worldwide problem,although its causes vary due to geographical and climatic differences and man-made *** recent years,the Robinia pseudoacacia forest in the Yellow River Delta has suffered severe *** causative mechanisms were investigated in the field over two years,and the results show that increased forest degradation was reflected by increased tree mortality,high leaf and soil sodium salt levels and groundwater *** tree diameters decreased,and leaf chlorophyll and soil microbial contents *** discriminate analysis(RDA)showed that degradation of the forest was correlated positively with soil salt content,but negatively with groundwater *** analysis showed that 0.79%–0.95%soil salt content and above 1.20 m groundwater depth caused the death of *** trees due to localized anthropogenic economic activities,such as rice farming,that disrupted the original water–salt *** are recommended to prevent further degradation and restore degraded forests.

关键词： Forest degradation Groundwater depth Robinia pseudoacacia forest Soil salt content The Yellow River Delta

monthly calibration and optimization of Ångstrom-Prescott equation coefficients for comprehensive agricultural divisions in China

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Journal of Geographical sciences 2021年第7期31卷 997-1014页

作者： XIA Xingsheng PAN Yaozhong ZHU Xiufang ZHANG Jinshui State Key laboratory of Remote Sensing science Jointly Sponsored by Beijing Normal University and Institute of Remote Sensing and Digital Earth of Chinese Academy of SciencesBeijing 100875China Academy of Plateau science and Sustainability Qinghai Normal UniversityXining 810016China Institute of Remote Sensing science and Engineering Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China

Angstrom-Prescott equation(AP)is the algorithm recommended by the Food and Agriculture Organization(FAO)of the United Nations for calculating the surface solar radiation(R_(s))to support the estimation of crop ***,the a_(s) and b_(s) coefficients in the AP are *** study aims to obtain coefficients a_(s) and b_(s) in the AP,which are optimized for Chinas comprehensive agricultural *** average monthly solar radiation and relative sunshine duration data at 121 stations from 1957-2016 were *** data from 1957 to 2010,we calculated the monthly a_(s) and b_(s) coefficients for each subregion by least-squares ***,taking the observation values of R_(s) from 2011 to 2016 as the true values,we estimated and compared the relative accuracy of R_(s) calculated using the regression values of coefficients a_(s) and b_(s) and that calculated with the FAO recommended *** monthly coefficients,a_(s) and b_(s),of each subregion are significantly different,both temporally and spatially,from the FAO recommended *** relative error range(0-54%)of R_(s) calculated via the regression values of the a_(s) and b_(s) coefficients is better than the relative error range(0-77%)of R_(s) calculated using the FAO suggested *** station-mean relative error was reduced by 1% to 6%.However,the regression values of the a_(s) and b_(s) coefficients performed worse in certain months and agricultural subregions during ***,we selected the a_(s) and b_(s) coefficients with the minimum R_(s) estimation error as the final coefficients and constructed a coefficient recommendation table for 36 agricultural production and management subregions in *** coefficient recommendations enrich the case study of coefficient calibration for the AP in China and can improve the accuracy of calculating R_(s) and crop evapotranspiration based on existing data.

关键词： solar radiation coefficient calibration Angstrom-Prescott equation least-squares regression agricultural divisions China

Fighting the enemy: How rice survives the blast pathogen's attack

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The crop Journal 2021年第3期9卷 543-552页

作者： Junjie Yin Lijuan Zou Xiaobo Zhu Yuyan Cao min He Xuewei Chen State Key laboratory of crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural University at WenjiangChengdu 611130SichuanChina Ecological Security and Protection Key laboratory of Sichuan Province Mianyang Normal UniversityMianyang 621000SichuanChina

Global food security is threatened by rice blast disease caused by the filamentous fungus magnaporthe *** understanding of rice resistance mechanisms is fundamental to developing strategies for disease *** this review,we summarize recent advances in pathogen-associated molecular pattern-triggered immunity,effector-triggered immunity,defense regulator-mediated immunity,and effects of nutrient elements on rice blast *** outline strategies used for breeding rice cultivars with improved disease *** also present the major research challenges for rice blast disease resistance and propose approaches for future investigation.

关键词： Blast fungus Resistance mechanism Immunity Rice breeding