nptⅡ基因在芥菜型油菜中的遗传规律

研究了转基因油菜Ｒ０、Ｒ１、Ｒ２代的Ｋｍ抗性。试验结果表明：芥菜型油菜Ｒ０的１，５，６，７，８，１０号无性系可抗Ｋｍ５０ｍｇ／Ｌ，其余的均抗Ｋｍ３５ｍｇ／Ｌ。Ｒ１种子在Ｋｍ２０ｍｇ／Ｌ的生根培养基上进行生根抗性试验，生根与不生根的比例经适合性检验（ｘ２检验）有１０个无性系符合孟德尔单基因分离的遗传规律，只有两个无性系不符合这一规律，出现了较高的抗性苗比例（３４：２；４０：６）。Ｒ２代共做了７个单株的种子抗性试验，其中６个单株的种子出现３：１的分离比，一个单株没有发生分离，种子全部可抗Ｋｍ。     

精制玉米蛋白粉的制备及在灌肠中的应用

玉米蛋白粉经氯仿常温浸泡２．５ｈ,７５℃抽提１．５ｈ;ｐＨ６．０,温度４０℃,４％β－ＣＤ溶液浸泡４ｈ脱臭;ｐＨ５．５,温度５５℃,２０％磷酸三钠浸泡改性处理后,制得玉米蛋白精粉。此精粉在灌肠中的添加量小于４％时,产品质量良好。     

牛心朴等荒漠植物对棉铃虫的生物活性

选择了牛心朴等６种荒漠植物，利用其提取物对棉铃虫作了毒力和对生长和变态的影响等生物活性试验，结果表明５％牛心朴和大骆驼蓬的提取物对棉铃虫有较强的毒力，棉铃虫幼虫死亡率分别为１００％和５５％；同时，这两种提取物对棉铃虫的变态也有显影响，用１％的牛心朴和５％的大骆驼蓬饲料饲喂棉铃虫，幼虫死亡率分别为８５％和５５％，而羽化率为０。用牛心朴的不同提取物饲料饲喂棉铃虫。结果发现０．５％牛心朴的酸性提取物和     

西河华Quan的年龄和生长研究

报道了对西河华Ｑｕａｎ的年龄和生长的初步研究，用鳞片鉴定年龄，得出体长与体重的关系式。华Ｑｕａｎ的年龄组成由１－５龄个体组成，各龄殖分别依序占标本总数的２．１５％，４０．８６％，３８．７１％，１７．２０％和１．０８％。该鱼在４龄以前生长较快，应限捕４龄以前的个体，以利于资源的增殖。     

甜菜碱对肉用仔鸡生长性能的影响

将２００只１日龄艾维茵肉用仔鸡随机分为４组（Ｉ、Ⅱ、Ⅲ、Ⅳ组），每组５０只，饲喂４种不同处理的日粮５周（含甜菜碱０、５×１０－４、１×１０－３、１．５×１０－３），自由采食和饮水，测定增重和饲料消耗。结果表明，３周龄时各组鸡平均体重差异不显著（Ｐ＞０．０５），但在５周龄时饲喂５×１０－４甜菜碱的鸡增重提高１６．５％（Ｐ＜０．０１），并使饲料消耗降低１．２％，其他试验组差异不显著。可见饲料中添加甜菜碱对提高肉用仔鸡生长性能、降低饲料消耗具有显著的经济效益。     

α－淀粉酶水解液发酵生产麦角隐亭的研究

用５％麦粉的α－淀粉酶水解液培养麦角菌ＡＴＣＣ２００１９，结果其发酵液能产生麦角隐亭（５０．１６±２．４０）μｇ／ｍＬ，与３０％蔗糖的发酵培养基的产碱量（２０．７４±３．５３）μｇ／ｍＬ相比，两者有差异（ｐ＜０．０５）．在１０％蔗糖的培养基中，发酵第４天后补加５％麦粉的α－淀粉酶水解液，麦角隐亭的产量为（４７．１２±６．３４）μｇ／ｍＬ，也高于碳源为３０％蔗糖的产碱量（１９．８９±２．４０）μｇ／ｍＬ，两者差异显著，ｐ＜０．０１．而两种方法的菌丝体生长量均相差无几，ｐ＞０．０５．     

稀土和维生素E对公犬精液品质影响的试验

将６只成年公犬随机分为（１）每日２０ｍｇ稀土／ｋｇ体重；（２）１０ｍｇ稀土；（３）每日１００ｍｇＶＥ；（４）２０ｍｇ稀土＋１００ｍｇＶＥ；（５）１０ｍｇ稀土＋５０ｍｇＶＥ和（６）对照，连续饲喂４０天，采精检查精液品质。实验结果，饲喂两种剂量的稀土，显著提高了公犬精液量、精子密度和精子活力，降低了畸型精子、死精子率和精子顶体异常率，缩短了精子美兰褪色时间。单独饲喂ＶＥ或与稀土配合使用，对于提高公犬精液品质各项指标均有显著作用     

稀土和维生素E对公犬精液影响的试验

将６只成年公犬随机分为每日２０ｍｇ稀土／ｋｇ体重；（２）１０ｍｇ稀土；（３）每日１００ｍｇＶＥ；（４）２０ｍｇ＋１００ｍｇＶＥ；（５）１０ｍｇ稀土＋５０ｍｇＶＥ和（６）对照，连续饲喂４０天，采精检查精液品质。     

转Bt基因杨树(NL-80106)对杨小舟蛾抗虫性研究

以转Bt抗虫基因杨树(NL-80106)的大田移植苗为材料，在室内控制和自然条件下测定其对畅小舟蛾幼虫的抗虫性。结果表明：转Bt基因杨树对杨小舟蛾1龄幼虫12d校正死亡率高达84．3％；其杀虫活性存在明显的时间动态，3个抗虫转基因杨树无性系FIN5、FB51和FB56对1龄幼虫12d的抗性由6月的56．9％～84．3％下降至7～8月的35．6％～45．1％，9月又回升至59．4％～80．8％；不同龄期幼虫对转基因杨树敏感性不同，1～3龄幼虫6d校正死亡率为19．8％～25．4％，与对照存在显差异，而4～5龄幼虫6d校正死亡率与对照差异不显；转Bt基因杨树对大部分杨小舟蛾幼虫的生长具有明显抑制作用，取食量、体重增长速率显低于对照，并导致幼虫最终死亡。     

稳定提高糖化酶生产酶活力的研究

对糖化酶在工业生产中影响酶活力的几个主要因素进行了试验研究，获得培养基最适浓度为２０．２５％，准确控制发酵培养基的标准体积、浓度及其适宜通风量（前期控制在１：０．４０～０．４７，中期为１：０．５５～０．６５，后期为１：０．５～０．５５）是糖化酶生产中稳产高产的关键技术措施。结果表明：采取该措施提高酶活力４７．３２％，经济效益显著。     

Assessment on alien herbicide-resistant gene flow among crucifers by sexual compatibility

Cross-pollination and high cross-compatibility are frequently found in many cruciferous plants, which implies that there might be potential risk of alien gene flow among crucifers. In this work, the alien glyphosate-resistant gene flow between GM （Genetically modified） rapeseed variety Q3 （Brassica napus） and 6 varieties from 5 cruciferous species was assessed by sexual compatibility through aniline blue fluorescence observation, manual cross, mentor pollination with the mixture pollen and DNA identification. The results indicated that the compatibility indices of two B. napus varieties, B. juncea vat. multiceps Tsen et Lee and Chinese cabbage （B. chinensis） （as female） with Q3 （as male） were 16.15, 12.77, 2.345 and 0.85, respectively. FI plants were examined by PCR and all of these samples were confirmed as positive. Crossing between Orychophragmus violaceus, Descurainia sophia （as female） and Q3 （as male） expressed high cross-incompatibility. Fluorescence microscope observation indicated that growing of pollen tube terminated at the upper 1/3 part of the style of O. violaceus and on the stigma surface of D. sophia. The mentor plants were further analyzed by PCR and all were shown to be negative. Under the neighboring growth and natural pollination conditions, the rates of gene flow to two B. napus varieties were 2.3278% and 2.1487%, respectively, B. juncea var. multiceps Tsen et Lee and Chinese cabbage were 1.0157% and 0.9236%, respectively. No gene flow was observed in O. violaceus and D. sophia. Frequency of gene flow was highly correlated with sexual compatibility. Due to possible alien gene flow among crucifers, special consideration and care should be taken to grow GM rapeseed.     

农杆菌介导抗虫基因转化芥菜型油菜的研究

用农杆菌介导法对芥菜型油菜进行了转化，并对影响根癌农杆菌转化效率的因素进行了研究，建立了以油菜子叶柄为外植体的转化体系．用携带蝎毒素(BmKITs)和几丁质酶(chi)双价基因的农杆菌转化油菜，共获得了抗卡那霉素的再生苗153株，移栽成活21株．对成活植株进行了PCR分子检测，证实有外源基因的整合．转基因植株形态正常，开花、结实．     

镉与铅互作及污泥改良对油菜生长与积累重金属的影响

采用盆栽试验,研究土壤受到镉与铅污染以及添加污泥对芥菜型油菜和甘蓝型油菜的生长及积累重金属的影响.镉与铅污染降低两种油菜的干重、株高和根长;添加污泥增加两种油菜的干重、株高和根长.添加污泥增加油菜根、茎和叶的镉和铅含量.镉与铅共存时,铅促进油菜的根、茎和叶的镉含量增加;土壤镉含量增加会降低油菜的根、茎和叶的铅含量.     

Transgene directionally integrated into C-genome of Brassica napus

Transgenic Brassica napus has been widely planted in Canada, the United States, and some other countries. In China, although the policy for genetically modified foods has not yet opened, genetically modified rape- seed oil as raw material for biodiesel of…     

利用农杆菌介导法将抗虫基因导入油菜的研究

以油菜的子叶柄作为转化的受体材料,经农杆菌感染和共培养,在含卡那霉素的筛选培养上诱导产了大量的不定芽,经生根培养,获得了再生植株,通过PCR扩增和基因组Southern杂交分析,证明其中5株为转基因植株,对转基因植株进行抗虫性检测,有2株表现出较好的抗虫性。     

甘蓝型油菜3个AP3重复基因植物反义表达载体的构建及遗传转化

利用pFGC5941构建了甘蓝型油菜3个AP3重复基因的植物反义表达载体pFGC5941-BnAP3-2、pFGC5941-BnAP3-3和 pFGC5941-BnAP3-4.采用快速冻融法,将载体导入农杆菌EHA105,转化甘蓝型油菜下胚轴.在5mg/L PPT的MS培养基中筛选,获得反义BnAP3-2基因的抗性再生植株31株,反义BnAP3-3基因的抗性再生植株20株,反义BnAP3-4基因的抗性再生植株42株.PCR鉴定结果显示,获得BnAP3-2反义的基因植株12株,BnAP3-3反义的转基因植     

Cytogenetics of intergeneric hybrids between Brassica species and Orychophragmus violaceus

In the sexual intergeneric hybrids between the cultivated Brassica species and Orychophragmus violaceus, both complete separation and partial separation of the parental genomes were found to occur during mitosis and meiosis under genetic control. The cytogenetics of these hybrids was species-specific for Brassica parents. The different chromosome behavior of hybrids with three Brassica diploids ( B. campestris , B. nigra and B. oleracea ) might contribute to the different cytogenetics of hybrids with three tetraploids ( B. napus, B. juncea and B. carinata). Owing to the parental genome separation, Brassica homozygous plants and aneuploids with various chromosome constitutions were identifiable in the progenies of these hybrids, which were valuable for the study of the structure and evolution of Brassica genome and for the breeding of Brassica crops.     

聚合Cry1Ab和Cry1F基因抗虫玉米对亚洲玉米螟存活率及平均体重的影响

实验用聚合Cry1Ab和Cry1F基因抗虫玉米335YH、696YH的人工饲料饲养亚洲玉米螟幼虫,研究人工饲料中聚合基因玉米对其存活率和平均体重的影响.结果表明:在25%用量处理下,玉米螟幼虫的存活率均低于38%,平均体重均低于45 mg,说明聚合Cry1Ab和Cry1F基因抗虫玉米种子能抑制供试亚洲玉米螟幼虫的生长和存活.335YH 25%用量和50%用量的致死性差异不大,但50%用量比25%用量抑制幼虫生长的效果更好.696YH品种对幼虫的致死性和抑制生长效果受剂量影响较大.     

Transgenic tobacco plants expressing synthetic Cry1Ac and Cry1Ie genes are more toxic to cotton bollworm than those containing one gene

Transgenic tobacco plants carrying Cry1Ac, Cry1Ie or both genes were obtained. In the leaves of transgenic plants carrying both genes, the contents of Cry1Ac and Cry1Ie proteins were 0.173% and 0.131% of the total proteins, respectively. Cry1Ac protein content was 0.182% and Cry1Ie protein con- tent was 0.124% of the total proteins in the leaves of transgenic plants containing only one Bt gene. Fresh leaves of transgenic tobacco and wild-type plants were used for the insect bioassay against wild-type and Cry1Ac-resistant cotton bollworm (Helicoverpa armigera). The bioassay results showed that transgenic plants carrying both genes were significantly more toxic to wild-type and Cry1Ac-resistant cotton bollworm than those carrying Cry1Ac or Cry1Ie alone. This study indicates that the higher toxicity of transgenic tobacco plants carrying both genes is caused by the cooperative function of both Bt proteins, thus providing a potential way to delay the development of insect resis- tance to transgenic crops.