在英特网上分析核酸与蛋白质的序列

在英特网上分析核酸与蛋白质的序列李健张卿伟（山东大学生命科学学院,济南２５０１００）关键词英特网序列分析核酸蛋白质近年来,数目众多的分子生物学数据库和软件相继与英特网连接［１］,使得在英特网上分析核酸与蛋白质序列成为可能,可分析的种类也越来越多。例如...     

玉米丛生芽体系的建立及抗除草剂转基因植株再生

以玉米优良自交系为材料, 利用芽尖分生组织诱导胚状体和丛生芽, 建立起一种快速有效且取材不受季节限制的玉米丛生芽诱导体系. 以丛生芽组织块为受体, 用基因枪将从拟南芥(Arabidopsis thaliana)突变体中克隆的抗除草剂基因als (acetolac-tate synthase)导入玉米细胞, 经除草剂chlorsulfuron筛选得到抗性组织块并再生植株. PCR检测和Southern杂交表明, 部分再生植株转入了als 基因. 除草剂喷施试验表明, 转基因植株及其子一代具有良好的抗除草剂特性. 建立了一种新的受基因型限制小的玉米离体培养及转基因受体系统, 能快速有效地获得大批转基因植株.     

Establishment of multiple shoot clumps from maize (Zea mays L.) and regeneration of herbicide-resistant transgenic plantlets

A kind of quick, efficient and season-free inducing embryoid and multiple shoot clumps system from shoot tip meristems that derived from elite inbreds of maize was established. The herbicide-resistant gene als (coding Acetolactate synthase) isolated from a mutant of Arabidopsis thaliana was transferred to tissue pieces of maize multiple shoot clumps by microprojectile bombardment. Herbicide-resistant tissue and regenerants were obtained through selections with herbicide chlorsulfuron. PCR analysis and Southern blot hybridization indicated that gene als has been transferred to some regenerants. The test of spraying chlorsulfuron displayed that the transgenic plantlets and R1 plants had favorable herbicide-resistant trait. We have established a new genotype-free system of maize which could rapidly and efficiently produce large quantities of transgenic plantlets.     

Establishment of multiple shoot clumps from maize (Zea mays L.) and regeneration of herbicide-resistant transgenic plantlets

A kind of quick, efficient and season-free inducing embryoid and multiple shoot clumps system from shoot tip meristems that derived from elite inbreds of maize was established. The herbicide-resistant gene als (coding Acetolactate synthase) isolated from a mutant of Arabidopsis thaliana was transferred to tissue pieces of maize multiple shoot clumps by microprojectile bombardment. Herbicide-resistant tissue and regenerants were obtained through selections with herbicide chlorsulfuron. PCR analysis and Southern blot hybridization indicated that gene als has been transferred to some regenerants. The test of spraying chlorsulfuron displayed that the transgenic plantlets and R₁ plants had favorable herbicide-resistant trait. We have established a new genotype-free system of maize which could rapidly and efficiently produce large quantities of transgenic plantlets.