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热带农产品质量安全预警信息研究思考 总被引:2,自引:0,他引:2
热带农产品生产是推动中国热带地区(热区)农村经济发展的重要支柱。热带农产品质量安全问题已成为制约中国热区经济发展的主要问题之一,质量安全预警信息研究作为保证热带农产品质量安全、维护消费者权益的重要手段和措施,对热带农业发展意义重大。此文分析了热带农产品质量安全预警信息研究的必要性和现状,提出了进一步加强研究的建议。 相似文献
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The genus Gossypium is a very diverse one with about 50 species.However,a very narrow germplasm base is presently being used for genetic improvement of Upland cotton.The wild tetraploid cotton species are reservoirs of important genes for pest and disease resistance,and for improved agronomic and fiber traits.Two of the most important forces impeding Upland cotton improvement are" 1)the paucity of information about genes that control important traits,and 2) the need for extensive usage of diverse germplasm. 相似文献
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陈相艳 《农产品加工.学刊》2011,(7):131-133
小米是我国重要粮食作物之一,小米加工产业在我国国民经济中占有重要地位。系统地介绍了小米加工产业的发展现状、面临的问题及发展趋势。 相似文献
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Kiran B. Gaikwad Naveen Singh Parampreet Kaur Sushma Rani Prashanth Babu H Kuldeep Singh 《Plant Breeding》2021,140(1):23-52
Rice is one of the most important crops in the world. The wild species of rice are expected to have novel beneficial alleles that have been lost from cultivated rice during the process of domestication. Therefore, wild species could be the potential source to induce lost genetic diversity in cultivated rice. Serving as an important reservoir of novel genes/QTLs, wild species, in general, are better adapted to different ecologies and can tolerate many biotic and abiotic stresses. Despite that, only a few wild species are studied and extensive characterization both at the molecular and morphological level is yet to be achieved. Several agronomically important genes/QTLs for improving biotic and abiotic stresses, resistance, productivity and grain quality traits were identified from AA genome donor wild species and were tagged with breeder friendly molecular markers for their transfer to elite genetic backgrounds. The present review provides information on the important wild rice species harbouring genes/QTLs for agriculturally important traits and their successful utilization in rice breeding programmes. 相似文献
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拟南芥(Arabidopsis thaliana)MYB4(AtMYB4)编码负调控转录因子,通过对苯丙烷途径中关键酶C4H(肉桂酸4-羟化酶)基因的抑制来调控重要次生代谢物质芥子酸酯的生物合成,在防御紫外线中起重要作用。同为十字花科的芸薹属(Brassica)有多种重要的油料、蔬菜和园林作物,如甘蓝型油菜(B.napus)、白菜(B.rapa)、甘蓝(B.oleracea)和芥菜(B.juncea)等。本研究克隆了甘蓝型油菜MYB4基因家族的RNA干扰片段BMYB4I,将其反义片段、正义片段采用NcoI+AatII和BamHI+XbaI分别插入到改进型植物RNA干扰基础载体pFGC5941M的启动子与间隔区、间隔区与终止子之间,形成重组载体pF-GC5941M-BMYB4I(简称为pBMYB4I)。经复合PCR鉴定表明,载体构建成功,并转化根癌农杆菌获得工程菌株。为揭示芸薹属MYB4基因调控芥子酸酯等苯丙烷物质合成的分子机理以及探索抗紫外线分子育种奠定了基础。 相似文献
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乐香202B早熟性的遗传分析与基因定位 总被引:1,自引:0,他引:1
品种生育期是水稻最重要的农艺性状之一,通过遗传育种方法改变品种的生育期,特别是缩短生育期,对水稻生产的发展具有重要意义。研究材料乐香202B是由乐山市农科所提供的早熟稳定性较好的品种,对其研究表明,乐香202B具显性早熟基因,经遗传分析表明,符合3:1分离比,且不具感光性及胞质效应。将该基因初步定位在染色体第2染色体短臂端,暂定名为Ef-2(x)。与微卫星标记RM279、RM154 有连锁关系,遗传距离分别为13.5cM和8.9cM。该基因的定位为下一步的基因分离和克隆奠定了基础。 相似文献
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AHP法在聊城市水城广场景观评价中的应用 总被引:1,自引:1,他引:0
为了探寻影响水城广场景观质量的重要景观因素,在对聊城市水城广场进行全面调查的基础上,采用AHP法通过8个准则层因素和25个评价因子对其景观进行综合评价。结果表明:(1)在聊城市水城广场景观评价体系中,准则层因素中道路景观和生态景观的权重分别占全部权重的32.38%、27.68%,说明二者是比较重要的2个因素;(2)25个评价因子中,道路景观中的主次分明情况权重值最大,为20.51%,进一步说明了道路景观在该评价中的重要地位。 相似文献
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PKS-NRPS数据库的研究进展 总被引:2,自引:0,他引:2
非核糖体多肽合成酶(NRPS)和聚酮合成酶(PKS)是调控次级代谢物聚酮类物质和非核糖体多肽合成的关键酶。随着生物息学的快速发展,国外的NRPS-PKS数据库和预测软件不断推出。本文对几个重要NRPS和PKS领域的数据库与预测软件的研究做一综述 相似文献
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分子标记技术在蔬菜作物品种鉴定与纯度检测中的应用 总被引:11,自引:0,他引:11
品种鉴定与遗传纯度检测是蔬菜作物种子品质检验极为重要内容。本文综述了以蛋白质、DNA为基础的分子标记,如蛋白质与同工酶、RELP、RAPD、SSR、ISSR等分析技术应用于蔬菜种子检测的基本原理与进展。利用标记分析技术成功进行F1种子纯度检测的关键是亲本与杂交种间稳定差异位点的获得。已获得的重要园艺性状紧密连锁的遗传标记将有利于F1种子纯度鉴定。由于分子标记客观、稳定、快速、高效,这些技术将在今后种子检测中起到重要作用。 相似文献
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Flavor is one of the most important attributes of fresh fruit for the consumer, and is affected by several factors, including genotype, maturity stage, and environmental conditions. Flavor-related metabolites were characterized in two important cherimoya varieties, cv. Concha Lisa and cv. Bronceada, during fruit ripening. The most important sugars present were glucose, fructose and sucrose, and only fructose and glucose increased during ripening. The most important acids were tartaric, malic and citric acids, and all increased as ripening progressed. Overall aroma profile was mainly determined by esters and terpenes in both varieties. Ester compounds such as ethyl hexanoate, butyl butyrate and hexyl propanoate increased during ripening. The activity of alcohol acyl transferase also increased during fruit ripening concomitant with ester accumulation. Terpenes, such as α and β-pinene, showed a reduction during ripening, whereas others, such as myrcene and limonene, increased. 相似文献
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The Japanese presence in U.S. banking markets is of particular significance. Japanese represent slightly over one-half of the total foreign banking presence in the U.S., concentrated in two states (California and New York). The growth of Japanese direct investment in the U.S. and the yen/dollar exchange rate appear to be the two most important economic factors influencing this rising Japanese banking presence. Japanese legislation liberalizing the flow of investment in and out of Japan, beginning in 1980, is a very important factor. Also, the International Banking Act of 1978 may be important in explaining the recent growth of Japanese bank branches in California. 相似文献