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Rice science 2015年第4期22卷 180-188页

作者： LI Mao-bai WANG Hui CAO Li-ming Shanghai Academy of Agricultural Sciences seed Management station of Shanghai

Weedy rice exerts a severe impact on rice production by competing for sunlight, water and nutrients. This study assayed the population structure, genetic diversity and origin of Northeast Asia weedy rice by using 48 simple sequence repeat markers. The results showed that weedy rice in Northeast Asia had a high genetic diversity, with Shannon＇s diversity index （I） of 0.748 and the heterozygosity （He） of 0.434. In each regional population, I value varied widely. The widest range of I （0.228-0.489） was observed in the weedy rice of Eastern China, which was larger than that of Northeast China and Korea （0.168-0.270）. The F-statistics of regional populations （Fis, Fit and Fst） also showed higher values in the weedy rice of Eastern China than those of Northeast China and Korea All weedy rice accessions were grouped into two clusters in the unweighted pair group method with arithmetic mean cluster analysis dendrogram, namely Eastern China branch and Northeastern China plus Korea branch. There was significant differentiation in genetic characteristics in weedy rice of northeastern and eastern Asia, especially in Eastern China.

关键词： weedy rice simple sequence repeat genetic diversity population structure weed control

Breeding and application of Jiafuzhan,a new elite early indica rice cultivar in China

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Frontiers in Biology 2007年第2期2卷 144-150页

作者： WANG Houcong HUANG Huakang QIU Simi ZHANG Shi FANG Yashun CAI Jinlei ZHENG Xuan HUANG Yumin CHEN Ruming SUN Chuanzhi CHEN Shuanglong CHI Xiaowen LIAO Xinying ZHANG Weiqing ZHONG Xinbin School of Life Sciences Xiamen UniversityXiamen 361005China fujian seed station Fuzhou 350001China Xiamen seed Management station Xiamen 361012China Xiamen Agriculture Technology Extension Center Xiamen 361003China

After 20 years of dedicated research,Jiafuzhan has been successfully developed under the new technologies in breeding high-quality early indica rice *** rice quality has almost reached the A-level Editable Rice of Agriculture Department of China,and its average production reaches 400-500 kg/(666.7 m^(2)).This new cultivar also has other characteristics such as enhanced resistance of blast and fallen,steady productivity,and strong *** has been put into production of over 11.4×10^(4)hm^(2)in fujian Province and has been introduced and extended in other Provinces like Jiangxi,Guangdong,and Guangxi,*** successes of breeding Jiafuzhan is a solution to the existing perennial problems in the rice industry,such as poor grain quality of big-grain rice and early indica rice,low productivity,and poor blast resistance of elite rice.

关键词： Jiafuzhan early indica rice high quality

LIGHT DEMANDS OF JUVENILE LAMINARIA JAPONICA

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Chinese Journal of Oceanology and Limnology 1989年第1期7卷 1-9,97页

作者：费修绠蒋本禹丁美丽吴雅景黄如意李汉昌 Sansha Lamnaria Sporeling Cultivation station Fujian

The light demands of seaweeds is an interesting and rather complex phenomenon because they depend not only on the species but also on their different development stages. Even different parts of the same plant sometimes have different light demands. Light control is an important procedure at large scale Lamnaria nursery stations in China. Technicians and scientists have different viewpoints on the best method to regulate light. A culture study on Lamnaria japonica starting from zoospores to several centimeter sporophytes to find the optimal and critical irradiance ranges for juvenile Laminaria at different development stages added more knowledge on this aspect. Experiment results show gametophytes can not tolerate irradiance of more than 150uEm-2s-1 while sporophytes can tolerate more than 519 uEm-2s-1. This big difference starts from the very early stage of 1-to 2-celled sporophytes. The biological basis and mechanism of this phenomenon need further research.

关键词： Laminaria juvenile strings sometimes starts cultivation slides young regulate naked

Long-Term No-Tillage Direct seeding Mode for Water-Saving and Drought-Resistance Rice Production in Rice-Rapeseed Rotation System

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Rice science 2014年第4期21卷 210-216页

作者： DU Xing-bin CHEN Chen LUO Li-jun XIA Long-ping LIU Kang CHEN Yin-hua YU Xin-qiao Shanghai seed Control station Shanghai Agrobiological Gene Center

To study the effects of long-term no-tillage direct seeding mode on rice yield and the soil physiochemical property in a rice-rapeseed rotation system, a comparative experiment with a water-saving and drought-resistance rice （WDR） variety and a double low rapeseed variety as materials was conducted under no-tillage direct seeding （NTDS） mode and conventional tillage direct seeding （CTDS） mode for four years, using the CTDS mode as the control. Compared with the CTDS mode, the actual rice yield of WDR decreased by 8.10% at the first year, whereas the plant height, spikelet number per panicle, spikelet fertility, 1000-grain weight, grain yield, actual yield, and harvest index increased with no-tillage years, which led to the actual yield increase by 6.49% at the fourth year. Correlation analysis showed that the panicle length was significantly related to the actual yield of WDR. Compared with the CTDS mode in terms of the soil properties, the pH value of the NTDS mode decreased every year, whereas the contents of soil organic matter and total N of the NTDS mode increased. In the 0-5 cm layer of the NTDS mode, the soil bulk decreased, whereas the contents of soil organic matter, total N, and available N increased. In the 5-20 cm layer of the NTDS mode, the available N and K decreased, whereas the soil bulk, contents of soil organic matter, and total N increased. In summary, the NTDS mode increased the rice yield, and could improve the paddy soil fertility of the top layer.

关键词： no-tillage direct seeding rice yield soil physiochemical property water-saving and drought-resistance rice rotation system

Identification of candidate genes that regulate the trade-off between seedling cold tolerance and fruit quality in melon (Cucumis melo L.)

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Horticulture Research 2023年第7期10卷 7-21页

作者： Lili Li Qiong Li Bin Chen Jiyu Wang Fei Ding Panqiao Wang Xiuyue Zhang Juan Hou Renren Luo Xiang Li Jingwen Zheng Sen Yang Luming Yang Lei Zhu Shouru Sun Changsheng Ma Qin Li Ying Li Jianbin Hu College of Horticulture Henan Agricultural UniversityZhengzhou 450002China The seed Management station of Zhengzhou City Zhengzhou 450001China

Trade-offs between survival and growth are widely observed in *** is an annual,trailing herb that produces economically valuable fruits that are traditionally cultivated in early spring in *** seedlings are sensitive to low temperatures,and thus usually suffer from cold stress during the early growth ***,little is known about the mechanism behind the trade-offs between seedling cold tolerance and fruit quality in *** this study,a total of 31 primary metabolites were detected from the mature fruits of eight melon lines that differ with respect to seedling cold tolerance;these included 12 amino acids,10 organic acids,and 9 soluble *** results showed that concentrations of most of the primary metabolites in the cold-resistant melons were generally lower than in the cold-sensitive melons;the greatest difference in metabolite levels was observed between the cold-resistant line H581 and the moderately cold-resistant line *** metabolite and transcriptome data for these two lines were then subjected to weighted correlation network analysis,resulting in the identification of five key candidate genes underlying the balancing between seedling cold tolerance and fruit *** these genes,CmEAF7 might play multiple roles in regulating chloroplast development,photosynthesis,and the ABA ***,multi-method functional analysis showed that CmEAF7 can certainly improve both seedling cold tolerance and fruit quality in *** study identified an agriculturally important gene,CmEAF7,and provides a new insight into breeding methods to develop melon cultivars with seedling cold tolerance and high fruit quality.

关键词： seedling breeding cultivar

Suppressing tawny crazy ant (Nylanderia fulva) by RNAi technology

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Insect Science 2020年第1期27卷 113-121页

作者： Jia Meng Jiaxin Lei Andrew Davitt Jocelyn RHolt Jian Huang Roger Gold Edward L Vargo Aaron MTarone Keyan Zhu-Salzman College of Plant Protection Fujian Agricultural and Forestry UniversityFuzhouFujianChina Department of Entomology Texas A&M UniversityCollege StationTexasUSA Institute for Plant Genomics&Biotechnology Texas A&M UniversityCollege StationTexasUSA

A bstract The tawny crazy ant(Nylanderia fulva)is a new invasive pest in the United *** present,its management mainly relies on the use of synthetic insecticides,which are generally ineffective at producing lasting control of the pest,necessitating alternative environmentally friendly *** this study,we evaluated the feasibility of gene silencing to control this ant *** housekeeping genes encoding actin(NfActin),coatomer subunit β (NfCOPP),arginine kinase(NfArgK),and V-type proton ATPase subunits A(NfvATPaseA),B(NfvATPaseB)and E(NfvATPaseE)were *** analysis revealed high sequence similarity to homologs from other ant species,particularly the Florida carpenter ant(Camponotus floridanus).To silence these genes,vector L4440 was used to generate six specific RNAi constructs for bacterial ***-inactivated,dsRNA-expressing Escherichia coli were incorporated into artificial *** ants exhibited reduced endogenous gene expression after feeding on such diet for 9 ***,only ingestion of dsRNAs of NfCOPfi(a gene involved in protein trafficking)and NfArgK(a cellular energy reserve regulatory gene in invertebrates)caused modest but significantly higher ant mortality than the *** results suggest that bacterially expressed dsRNA can be orally delivered to ant cells as a mean to target its *** efficacy is necessary for the RNAi-based approach to be useful in tawny crazy ant management.

关键词： artificial diet gene silencing housekeeping gene Nylanderia fulva RNAi survival rate

Linkages of flow regime and micro-topography:prediction for non-native mangrove invasion under sea-level rise

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Ecosystem Health and Sustainability 2020年第1期6卷 462-475,461页

作者： Luzhen Chen Hongyu Feng Xiaoxuan Gu Ying Dong Peng Cheng Xudong Guo Qiulian Lin Ting Tang Yihui Zhang Xudong Zhu Shengchang Yang Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem College of the Environment and EcologyXiamen UniversityXiamenFujianChina Zhangjiang Estuary Mangrove Ecosystem Observation and Research station of fujian Province Zhangjiang Estuary Mangrove Ecosystem Observation and Research Station of Fujian ProvinceXiamen UniversityXiamenFujianChina State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamenFujianChina

Flow regime is a key driver of invasive aquatic organisms,and the invasiveness of mangrove species may be simultaneously attributed to plant traits and flowing hydrological conditions at the estuary *** focused on hydrological and topographic conditions for a non-native mangrove species,Sonneratia apetala,in Zhangjiang Estuary of fujian,China.A hydrological model and a micro-topographic model were used to predict its dispersal and early establishment,and field surveys and simulated experiments were integrated to estimate its future dispersal *** mesohaline mudflat with a salinity of 8~10 PSU at the mangrove seaward edge was the most likely colonization area for *** under current *** south-western region of the estuary with native mangroves was the most likely area for its colonization according to the unstructured-grid finite-volume community ocean model(FVCOM)in September,when the largest tidal currents within a year and the maximum fruit maturity period *** 42%of the mudflats throughout the whole estuary may be available for seedling establishment under the future sea-level rise RCP 4.5 scenarios compared with 44%for current establishment;however,the RCP 8.5 scenarios would significantly decrease seedling establishment by 2100 due to serious tidal inundation according to the micro-topographical model.

关键词： Mangroves salinity elevation sea-level rise climatic change biological invasion

Characteristics of Eddy Current Attenuation and Thickness Measurement of Metallic Plate

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Chinese Journal of Mechanical Engineering 2019年第6期32卷 92-100页

作者： Zhiwei Zeng Pengcheng Ding Jiayi Li Shaoni Jiao Junming Lin Yonghong Dai School of Aerospace Engineering Xiamen UniversityXiamen 361005China Work station of Academicians Fujian Province(Eddysun)Xiamen 361008China

In eddy current testing, the law of attenuation of eddy current(EC) is of great concern. In conductive half space under the excitation of uniform magnetic field, the EC density decreases exponentially in the depth direction. However, in conductor with finite thickness tested by coil, the distribution of EC in the depth direction is more complicated. This paper studies the characteristics of EC attenuation in metallic plate of finite thickness. Simulation results show that there is an EC reflection at the bottom of plate, which changes the law of EC attenuation. A new concept, namely the equivalent attenuation coefficient, is proposed to quantify the speed of EC attenuation. The characteristics of EC attenuation are utilized to explain the nonmonotonic relation between coil voltage and plate thickness. Procedure of selecting frequency is discussed. Thereafter, measurement of plate thickness is carried out and accurate result is obtained.

关键词： Eddy current testing Attenuation of eddy current Thickness measurement Metallic plate

Impact of temperature on yield and related traits in cotton genotypes

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Journal of Integrative Agriculture 2016年第3期15卷 678-683页

作者： Kalim Ullah Niamatullah Khan Zahid Usman Rehmat Ullah Fazal Yazdan Saleem Syed Asif Imran Shah Muhammad Salman Pakistan Central Cotton Committee Cotton Research Station Department of Agricultural Extension Education & Communication The University of Agriculture Oil seed Programme National Agriculture Research Center

Cotton growth and development is influenced by various uncontrollable environmental conditions. Temperature variations in the field can be created by planting at different dates. The objective of the present study was to evaluate the effect of planting dates and thermal temperatures（growing degree days） on yield of 4 cotton genotypes, viz., CIM-598, CIM-599, CIM-602 and Ali Akbar-703. Plants were subjected to 6 planting dates during 2013 and 2014 in a trial conducted in randomized complete block design with four replications. For boll number, boll weight and seed cotton yield, cotton genotypes exhibited significant differences, CIM-599 produced the highest seed cotton yield of 2 062 kg ha^（–1） on account of maximum boll number and boll weight. The highest seed cotton yield was recorded in planting dates from 15 th April to 1st May whereas early and delayed planting reduced the yield due to less accumulation of heat units. Regression analysis revealed that increase of one unit（15 days） from early to optimum date（15th March to 15 th April） increased yield by 93.58 kg ha^–1. Delay in planting also decreased the seed cotton yield with the same ratio. Thus it is concluded that cotton must be sown from 15 th April to 1st May to have good productivity in this kind of environment.

关键词： Gossypium hirsutum planting dates growing degree days genotypes

Preparation of Alumina Abrasion-Resistant Ceramic Grinding Ball with Spent FCC Equilibrium Catalyst

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China Petroleum Processing & Petrochemical Technology 2010年第4期12卷 23-29页

作者： Liang Zhiyu Yan Guiyang Zheng Liuping Weng Xiulan Huang Zheqiang College of Chemistry and Materials Science Fujian Normal University Fuzhou 350007 Meizhouwan Environmental Monitoring station Putian 351158

The chemical composition, structure and thermal stability of the spent FCC equilibrium catalyst from an oil refinery were characterized by XRD, FT-IR, DTA-TG, BET, complete chemical analysis, SEM, and XRF. The spent FCC equilibrium catalyst, clay, barium carbonate, and talc were used as the main raw materials to prepare the alumina abrasion-resistant ceramic balls to be used in the powder grinding mill for manufacture of architecture tiles. The results showed that after proper formulation study, the spent FCC equilibrium catalyst could replace industrial alumina to prepare high performance grinding balls. Meanwhile, the various performance indices of the grinding ball could meet the quality standard for similar products, and additionally, the energy saving effect was achieved in the operation of the grinding section, resulting in a successful comprehensive utilization of solid wastes.

关键词： spent FCC equilibrium catalyst alumina abrasion-resistant ceramic ball solid waste utilization