转基因大麦中gfp基因的染色体位置及其表达(英文)

被引:14
作者
陈建民
Carlson A R
万建民
Kasha K J
机构
[1] 南京农业大学农学院,美国威斯康星大学农学院,南京农业大学农学院,加拿大奎尔夫大学植物农学系南京,扬州大学生物科学与技术学院,扬州,WI,南京,ONNGW
关键词
大麦; 绿色荧光蛋白; 荧光原位杂交; 基因表达; 染色体位置;
D O I
暂无
中图分类号
S512.3 [大麦];
学科分类号
0901 ;
摘要
通过对大麦小孢子进行基因枪轰击获得 4株转绿色荧光蛋白基因 (gfp)的植株 (A、C、D、E) ,以gfp基因为探针进行荧光原位杂交 (FISH)研究转化植株中转基因插入位置和基因表达。 4个株系在染色体 7L(5HL)的不同位置都有一个插入点 ,而E株系在染色体 5S(7HS)还有第 2个插入点。所有的转基因T0 代植株都是半合子并在T1、T2代发生分离。D株系GFP未表达 ,但FISH和PCR分析表明gfp基因已成功插入其染色体。各株系在根尖和花粉中的GFP表达水平不同 :C株系在花粉表达强而在根尖表达中等 ;A株系在花粉中等表达而在根尖表达较淡 ;E株系则在根尖高表达 ,花粉中等表达。A和C株系在根尖和花粉的GFP分离都表现单位点特性 ,而E株系的根尖分离表现重叠作用 (15∶1)特征 ,但在花粉中表达GFP的频率低。PCR结果和 3个分离株系的根尖表达结果一致。D和E株系的GFP表达不正常可能和gfp基因插入位置或基因的结构有关。
引用
收藏
页码:697 / 705
页数:9
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