木糖对多年生黑麦草愈伤组织生长的影响     

毛萍  蒋彬  马欣荣  邓霄禹  乔定君  杨宏 《草业科学》2011,28(5):758-762

木糖被认为是生物安全的选择试剂.为探讨木糖异构酶基因能否作为筛选标记在多年生黑麦草(Lolium perenne)遗传转化中运用.以成熟种子诱导的愈伤组织为外植体.研究木糖作为碳源对愈伤组织生长的影响,5周后观察结果.结果表明,在愈伤组织继代培养基(SM)中分别添加蔗糖、木糖以及不同配比蔗糖+木糖,愈伤组织生长状况不同...  相似文献   

转抗虫基因作物的安全性及其对策   总被引：1，自引：0，他引：1  

程焉平 《吉林农业大学学报》2002,24(5):49-52

转抗虫基因作物在基因工程育种中占有非常重要的地位。同时，其生物安全问题又是目前国际社会和公众广泛关注的焦点。文中在简要概述转抗虫基因研究与发展的基础上，综述了转抗虫基因作物与食品的安全性和转抗虫基因作物的生态风险。并提出了相应的对策。  相似文献   

转基因作物及其生物安全性   总被引：9，自引：0，他引：9  

李瑞峰  王莹  王宇  胡宝忠 《东北农业大学学报》2007,38(3):405-410

随着基因工程技术日益完善,转基因作物的种类和耕种面积迅速增长,但其潜在的问题也日益突出和明显。文章对转基因作物的研究和应用概况以及安全性进行了简要综述。  相似文献   

兽用基因工程生物制品的安全控制对策与措施(III)——生物安全控制措施     

范书才 《中国兽药杂志》2001,(5)

本文阐述了实验室生物安全原则、动物试验生物安全控制、兽药生产质量管理规范的要点和环境释放监测的内容及方法等兽用基因工程生物制品的生物安全控制措施  相似文献   

Gene flow from weedy red rice (Oryza sativa L.) to cultivated rice and fitness of hybrids     

Vinod K Shivrain  Nilda R Burgos  David R Gealy  Marites A Sales  Kenneth L Smith 《Pest management science》2009,65(10):1124-1129

BACKGROUND: Gene transfer from weeds to crops could produce weedy individuals that might impact upon the evolutionary dynamics of weedy populations, the persistence of escaped genes in agroecosystems and approaches to weed management and containment of transgenic crops. The present aim was to quantify the gene flowrate from weedy red rice to cultivated rice, and evaluate the morphology, phenology and fecundity of resulting hybrids. Field experiments were conducted at Stuttgart and Rohwer, Arkansas, USA. Twelve red rice accessions and an imazethapyr‐resistant rice (Imi‐R; Clearfield^?) were used. RESULTS: Hybrids between Imi‐R rice × red rice were 138–150 cm tall and flowered 1–5 days later than the rice parent, regardless of the red rice parent. Hybrids produced 20–50% more seed than the rice parent, but had equivalent seed production to the majority of red rice parents. Seeds of all hybrids were red, pubescent and dehisced at maturity. For the majority of hybrids, seed germination was higher than that of the red rice parent. The gene flowrate from red rice to rice was 0.01–0.2% and differed by red rice biotype. The hybrids had higher fecundity and potential competitive ability than the rice parent, and in some cases also the red rice parent. CONCLUSIONS: Red rice plants are vectors of gene flow back to cultivated rice and other weedy populations. The progeny of red rice hybrids from cultivated rice mother plants have higher chances of persistence than those from red rice mother plants. Gene flow mitigation strategies should consider this scenario. Copyright © 2009 Society of Chemical Industry  相似文献   

抗草甘膦转基因大豆生物与环境安全性   总被引：2，自引：2，他引：2  

沈晓峰  栾凤侠  陶波 《东北农业大学学报》2007,38(3):401-404

世界转基因作物发展速度迅猛,其中抗除草剂转基因大豆的种植面积和作物产量都占有较大比例,其安全性也受到人们极大关注。文章通过对抗除草剂转基因大豆多年的研究总结,并结合国内外抗除草剂转基因大豆的研究文献,阐述了抗草甘膦转基因大豆现状及其发展,并对其生物和环境的安全性问题进行评价。  相似文献   

关于转基因作物安全性的争论   总被引：7，自引：0，他引：7  

陈刚  吴晓霞  顾蕴洁  王忠 《天津农学院学报》2002,9(1):34-38

转基因作物的商品化种植自1995年以来迅速增长。转基因作物无论在产量，抗性还是在品质等方面都显著提高，但最近，一个围绕转基因作物安全性的争论在全球范围内展开了，本文简单介绍了这场争论的中心，即转基因作物的潜在风险，并指出引起这场争论的真正原因是政治和贸易问题，同时对我国面对这场争论所应采取的对策提出几点建议。  相似文献   

台湾农业生物技术发展概况与生物安全管理   总被引：1，自引：0，他引：1  

池敏青 《台湾农业探索》2012,(3):1-4

回顾了促进台湾农业生物技术发展的政策环境,阐述了目前台湾农业生物技术发展取得成效及产业发展概况;并对台湾转基因生物安全的管理架构和管理政策进行分析;总结了台湾农业生物技术未来发展的重点和趋势。  相似文献   

Effect of Bt traits on transgenic rice’s growth and weed competitiveness          下载免费PDF全文

《农业科学学报》2023,22(8):2346-2358

Transgene escape could lead to genetically modified rice establishing wild populations in the natural environment and competing for survival space with weeds. However, whether the expression of the Bacillus thuringiensis (Bt) gene in rice will alter the relationship between transgene plants and weeds and induce undesirable environmental consequences are poorly understood. Thus, field experiments were conducted to investigate the weed competitiveness and assess the ecological risk of transgenic Bt rice under herbicide-free and lepidopterous pest-controlled environments. Results showed that weed–rice competition in the direct-sowing (DS) field was earlier and more severe than that in the transplanting (TP) field, which resulted in a significant decrease in biomass and yield in DS. However, conventional Bt and non-Bt rice yield was not significantly different. The weed number, weed coverage ratio, and weed diversity of conventional Bt rice were significantly higher than those of non-Bt rice at the early growth and mature stages, especially in DS plots, suggesting that Bt traits did not increase the weed competitiveness of transgenic rice and had no negative effect on weed diversity. Grain yield and weed number varied between different hybrid rice lines, but those differences were insignificant between Bt and non-Bt rice. The number of insects increased with the increase of weeds in hybrid rice plots, whereas the insect number and diversity did not display a significant difference between Bt and non-Bt rice. Therefore, the ecological risk of transgenic Bt rice is comparable to non-Bt rice.  相似文献   

转基因林木生物安全性评价及管理研究     

朱荷飞  朱明艳  肖曙光 《河南林业科技》2008,28(1):35-37

近年来基因工程技术被引入林木育种领域中,研制成功的转基因林木却因生物安全性问题等诸多因素限制,使其潜在经济价值开发利用较缓慢。本文综述了转基因林木研制及安全性评价的现状,总结了国内外转基因生物安全管理的经验,强调了转基因林木安全管理应结合林木自身特点,尽可能发挥转基因林木的经济价值。  相似文献