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最近,西南大学家蚕基因组研究团队再次取得重大突破和又一项标志性成果,研究论文《40个基因组完全重测序揭示蚕的驯化事件及其相关基因》（《Complete resequencing of 40 genomes reveals domestication events and genes in silkworm（Bombyx）》）于北京时间2009年8月28日3时在国际著名学术杂志《Science》在线发表。 相似文献
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2009年8月28日,西南大学家蚕基因组研究取得重大突破和又一项标志性成果,家蚕基因组研究创新团队主持完成的“40个基因组的重测序揭示了蚕的驯化事件及驯化相关基因”研究成果在国际著名学术杂志《SCIENCE》上发表,学校隆重召开新闻发布会,并向家蚕基因组团队进行表彰。 相似文献
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我国家蚕基因组的最新研究——对家蚕基因组精细图和40个蚕类基因组遗传变异图的解读 总被引：1，自引：1，他引：0
2008年12月,西南大学家蚕基因组研究团队宣布了世界上第1张家蚕基因组精细图谱的诞生。家蚕基因组精细图和2003年发布的家蚕基因组框架图相比,具有基因覆盖度高、基因组组装更加完整、基因鉴定更加准确等特点。2009年,该研究团队在家蚕基因组精细图的基础上,选取具有代表性的29个家蚕突变品系和11个不同地理来源的中国野桑蚕品系进行了全基因组重测序与序列比较分析,共获得了29个家蚕突变品系和11个中国野桑蚕地理品系的全基因组序列,绘制完成了世界上第1张基因组水平上的蚕类单碱基遗传变异图谱,同时还发现了驯化对家蚕生物学性状影响的基因组印记,从全基因组水平上揭示了家蚕的起源进化。2009年8月,《Science》杂志发表了西南大学的研究论文"40个蚕类基因组的重测序揭示了家蚕的驯化事件及驯化相关基因",标志着家蚕基因组计划进入一个新的历史阶段。 相似文献
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《蚕学通讯》2013,(3):37-37
人工核酸酶介导的基因组编辑（genome editing with engineered nucleases ）技术是近几年发展起来的一种技术手段,被《Nature M ethods》杂志评为2011年的年度技术。家蚕的基因组编辑在研究家蚕功能基因、培育家蚕新型素材、家蚕生物反应器开发领域有着巨大的应用潜力。西南大学家蚕功能基因组研究团队紧跟国际上基因组编辑技术的最新发展趋势,迅速在家蚕基因组编辑研究领域开展相关研究工作。2012年9月,该团队在《PLoS ONE》杂志上公布了其利用近期发展起来的基因组编辑工具- TALE核酸酶技术（TALEN）实现对家蚕内源靶基因的可遗传敲除的研究成果,该论文发表以后受到国内外众多媒体的转载与评论,发表之后的短短一年时间内即被包括《Nat Rev Mol Cell Biol》、《Genome Res》等高水平杂志在内的论文引用28次。随后,研究团队又围绕着建立高效的家蚕基因组编辑技术平台开展研究工作,建立了适用于家蚕基因组编辑的 TALEN 高效组装技术体系和活性检测平台。通过组装平台,研究人员可以高效的对人工设计的 TALEN 打靶载体进行组装。通过活性检测平台,研究人员可以便利地对组装的 TALEN 打靶载体的打靶效率进行评估,筛选高活性的TALEN 打靶载体,这对提高对家蚕功能基因敲除,尤其是可遗传敲除的成功率有着重大意义。该体系的建立标志着家蚕基因组编辑技术平台的完善和成熟,为实现家蚕功能基因的大规模敲除打下了坚实基础。相关研究论文“High-efficiency system for construction and evaluation of customized TALENs for silkworm genome editing”于2013年9月28号在国家权威杂志《Molecular Genetics and Genomics》上在线发表（http ：／／link ．springer ．com／article／10．1007／s00438-013-0782-4）。 西南大学家蚕基因组生物学国家重点实验室博士研究生王峰、马三垣为论文的共同第一作者,西南大学长江学者特聘教授夏庆友是论文的通讯作者。该研究得到了国家973计划,863计划的支持。 相似文献
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12月10日,家蚕基因组研究论文在《Science》上发表。为了庆祝家蚕基因组研究论文在《Science》杂志上发表,11日上午9时,由重庆市委、市府举办的庆祝大会在西南农业大学第一教学楼报告厅隆重举行。市委副书记邢元敏、市人大副主任康纲有、市政府副市长谢小军、市政协副主席李明、 相似文献
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6月10日出版的《自然·遗传学》杂志刊登了我国科学家撰写的《鸭基因组与禽流感》一文，该文章由中国农业大学李宁教授、华大基因研究院院长王俊博士等学者共同完成，该文的发表标志着我国对鸭基因组的研究已经取得突破性成果。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献