一个对播种期反应敏感的不育大豆特征分析   总被引：2，自引：0，他引：2  

彭玉华  袁建中 《作物学报》1998,24(6):1010-1013

Brim和Young最早发现并报道了大豆雄性不育、雌性可育突变体,即msl系统(Brim and Young 1971)。其特点是雌性大部分可育,雄性几乎完全不育;产生大量双胚苗(Kenworthy等,1973);由减数分裂的异常引起(Albertsen,1976)。此外,在大豆中还发现了其它完全或部分雄性不育突变。这包括Arkansas部分雄性不育(Cavines等,1970;Cavines and Fagala,1973)、ms2突变休(Bernard and Cremeens,1975)和Wabash雄性不育(Chaudhari and Davis,1977)。Palmer证实,在msl位点的4个独立突变均引致雄性不育(Reid G. Palmer等,1978)。作者曾对一个核质互作雄性不育大豆的发现、特征及表现进行了描述,并进行初步遗传分析(Yuhua Peng el al.,1993)。本文对一新的不育材料进行了详细的描述和分析。  相似文献   

The effectiveness and toxicity of recombinant adenovirus vector transferation via trachea and vein     

WANG Wei  WU Shu-ming  ZHANG Zhong-ming  ZHANG Yi-qian 《园艺学报》2008,24(12):2493-2496

  相似文献   

StAX技术在XML文档解析中的应用     

荣江  赵庆展  李伟 《计算机与农业》2008,(5):165-167

随着XML的不断发展以及应用的逐步深入,高效解析XML文档变得越来越重要。本文对DOM、SAX解析XML进行了介绍,分析了两种解析方式的优劣,在此基础上,文章重点阐述了StAX的两种解析方式,并总结了StAX技术的优势。  相似文献   

试论中国特色社会主义道路对实践的巨大推动作用     

李伟 《云南农业大学学报(自然科学版)》2008,2(5):1-4

中国特色社会主义道路的形成是对科学社会主义理论的创新，它为我国社会主义建设和发展提供具有创新意义的重大方略和举措，为社会主义事业更加深入人心和不断进步提供理论依据。  相似文献   

人才信息管理系统的开发研究     

黄惠珍  刘善文  郑海新  包巍  陈志峰 《农业网络信息》2008,(8)

本文介绍了在科研单位中人才信息系统的特点及系统结构,并对系统中的各类数据库、信息的量化与标准化和规范化等主要问题作了论述.  相似文献   

Expression of tissue factor,tissue factor pathway inhibitor in the atherosclerotic plaque on femoral artery of New Zealand rabbits     

HUANG Cheng-lei  LUO Xin-ping  LI Jian  LIANG Wang  LIN Yi-feng  JIN bo  SHEN Wei  SHI Hai-ming  MA Duan 《园艺学报》2008,24(12):2311-2314

AIM: To observe the regulatory changes of tissue factor (TF),tissue factor pathway inhibitor-1 (TFPI-1) and tissue factor pathway inhibitor-2 (TFPI-2) associated with the formation of atherosclerotic plaque on femoral artery of New Zealand rabbits.METHODS: New Zealand rabbits were fed with high cholesterol diet and received femoral artery balloon injury to establish moderated atherosclerotic plaque animal model.These rabbits were classified into 8 weeks group,10 weeks group and 12 weeks group.The expressions of factor TF,TFPI-1 and TFPI-2 in femoral artery were detected by immunohistochemical methods at 8th,10th and 12th week.The positive areas of the slice were analyzed by semi-quantification system.Fluorescence quantification PCR (FQ-PCR) was used to detect the copies of mRNA of TF,TFPI-1 and TFPI-2 in each group.RESULTS: The expressions of TF,TFPI-1 and TFPI-2 determined by immunohistochemical methods were increased from 8th,10th to 12th week,respectively.In each group,the quantity of mRNA of TF and TFPI-1 at the 8th,10th and 12th week was soared,respectively.In each group,the quantity of mRNA of TFPI-2 did not change in early phase,but decreased at 12th week.CONCLUSION: In the process of the atherosclerotic plaque formation in rabbit femoral artery model,the expressions of TFPI-1 and TFPI-2 proteins are increased.However,the expression of TPFI-1 or TFPI-2 could not stave off the development of plaque formation.  相似文献   

Topography and land use effects on the spatial variation of soil organic carbon: A case study in a typical small watershed of the black soil region in northeast China     

Jian-bing Wei  Du-ning Xiao  Xing-yi Zhang  Xiao-yu Li 《Eurasian Soil Science》2008,41(1):39-47

Soil organic carbon is a soil property of central importance for soil quality and the global carbon cycle. Studies specifically aimed at the relationship between the spatial variation of soil organic carbon and environmental factors are few. In this paper, a typical small watershed named Tongshuang in the black soil region of northeast China, which was subjected to drastic erosion before 1980 and was managed subtly after 1980, was chosen as a study area. Classical statistic and geostatistic analysis methods, in combination with a geographic information system (GIS), were used to quantitatively research the spatial variation characteristics of the soil organic carbon and their relation to the topographic factors and land use. The data on the soil organic carbon, topographic factors, and land use were obtained by soil sampling and measurements derived from DEM, remote sensing images, and field investigations, respectively. The classical statistics analysis results indicated that the variability of the soil organic carbon was moderate (C_v = 0.30). The slope position and land use types were the most discriminating factors. The soil organic carbon content was the highest in the grassland and lowest in the coniferous forest (P < 0.01). It increased gradually along the slope position gradients from the interfluve to the toe slope. The geostatistics analysis showed that the soil organic carbon had a strong spatial correlation. The C₀/(C₀ + C) was 0.1608, which was mainly induced by structural factors. The mean soil organic content is 2.27% in this watershed. It is on a very low level in the northern black soil of northeast China. In this small watershed of the eroded black soil region, the present soil and water conservation measures play an important role in controlling the soil loss. However, the soil organic carbon’s restoration is unsatisfactory. Nearly three-quarters of the land has worrisome productivity. How to improve the soil organic carbon content while targeting the soil fertility is a pressing need. Published in Russian in Pochvovedenie, 2008, No. 1, pp. 44–53. The text was submitted by the authors in English.  相似文献   

联合收割机造型演变及其规律的研究     

陈为 《农机化研究》2008,(8)

回顾联合收割机的发展过程,从结构和功能着手,分析不同时期联合收割机所具有的造型特征,提出了不同时期联合收割机造型的几何模型-"分散"型、"L-长方体"型、"T-长方体"型、"T-曲长方体"型、"T-梯形体"型和"T-曲梯形体"型等,总结其造型演变规律,为设计新型联合收割机造型提供了依据.  相似文献   

小麦中微量元素测定方法的研究     

海黎  张颖  周薇  李喜昌  沙里 《内蒙古农业大学学报(自然科学版)》1997,(2)

本实验对小麦中多种微量元素测定所采用的样品处理方法，溶液酸度，以及共存元素的影响进行了研究，为选择最佳分析条件提供了依据。  相似文献   

浅析《紫色》中的对话意识     

王玮  王成涛 《塔里木大学学报》2009,21(3):102-105

艾丽丝·沃克（Alice walker）的著名作品《紫色》之所以获得巨大的成功，除了作者以其新颖的构思和独特的手法为我们展示了一个丰富的世界，并展现了许多美国社会当前的重大问题以外，更重要的是作者在其中所体现的对话意识。  相似文献