转CMV-CP基因番茄后代的田间抗病性

RESISTANCE OF CMV CP TRANSGENIC TOMATO TO CMV IN SELFED PROGENIES

以土壤农杆菌为介导，用叶盘法转化获得的转ＣＭＶ－ＣＰ基因（黄瓜花叶病毒外壳蛋白基因）番茄工程植株，通过连续选择和自交，得到Ｒ１、Ｒ２、Ｒ３、Ｒ４和Ｒ５代的转化番茄植株。１９９３～１９９４年采用人工接种和田间自然发病两种方式鉴定转化植株对ＣＭＶ病毒的田间抗性。结果表明，转基因番茄植株对ＣＭＶ侵染有高度抗性。人工接种Ｒ１、Ｒ２、Ｒ３、Ｒ４代转化植株的防病效果达５０％～７３％。有５０％以上的转基因植株始终未被ＣＭＶ病毒侵染，表现为免疫抗性。自然条件下，Ｒ２～Ｒ５代转化植株的防病效果达５７％～７９％。转化植株的产量比对照人工接种的高１０～６０倍。

The transgenic tomato was obtained by transforming Agrobacterium tumefacience with GUS and CMV CP genes residing on the Ti plasmid constructs. The methods of artifical inoculation and natural infection in field were used to test the resistance of CMV CP transgenic tomato plants to CMV in its selfed generations. The result showed that tomato plants transformed with CP genes of CMV had high levels of resistance to CMV and the yield increased significantly in the selfed generations of R 1 to R 5.