Particle-bombardment-mediated co-transformation of elite Chinese rice cultivars with genes conferring resistance to bacterial blight and sap-sucking insect pests

被引:85
作者
Tang, KX
Tinjuangjun, P
Xu, Y
Sun, XF
Gatehouse, JA
Ronald, PC
Qi, HX
Lu, XG
Christou, P
Kohli, A [1 ]
机构
[1] John Innes Ctr Plant Sci Res, Mol Biotechnol Unit, Norwich NR4 7UH, Norfolk, England
[2] Fudan Univ, Inst Genet, Shanghai 200433, Peoples R China
[3] Univ Durham, Dept Sci Biol, Durham DH1 3LE, England
[4] Univ Calif Davis, Dept Plant Pathol, Davis, CA 95616 USA
[5] Hubei Acad Agr Sci, Hybrid Rice Res Ctr, Wuhan 430064, Hubei, Peoples R China
基金
英国生物技术与生命科学研究理事会;
关键词
bacterial blight (Xa21 gene); lectin (gna gene); Oryza (co-transformation); resistance genes (gna; Xa21);
D O I
10.1007/s004250050593
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Transgenic rice plants were generated using particle bombardment to simultaneously introduce the Xa21 gene effective against bacterial blight and the Galanthus nivalis agglutinin (snowdrop lectin; gna) gene effective against sap-sucking insect pests, specifically the brown plant hopper. Using three plasmids, we cotransformed 5- to 10-d-old, mature seed-derived rice (Oryza sativa L.) callus of two elite Chinese rice cultivars, Eyi 105 and Ewan 5. The plasmids carried a total of four genes. The gna and Xa21 genes were carried on separate plasmids. The selectable marker hygromycin phosphotransferase (hpt) and the reporter gene beta-glucuronidase (gusA) were linked on the same, co-integrate vector. We recovered over 160 independently derived transgenic rice plants. Over 70% of the transgenic plants carried all four genes, as confirmed by polymerase chain reaction and/or Southern blot analysis. Furthermore, 70% of transgenic plants carrying all four genes also coexpressed all four genes, as confirmed by growth on selection media (hpt), GUS histochemical assays (gusA), western blotting (gna) and reverse transcriptase-polymerase chain reaction (Xa21) analysis. The co-expression efficiency reported for the four transgenes in our study is the highest ever found in any transgenic plant population generated through co-transformation. The linked genes (hpt and gusA) co-integrated with a frequency of near 100%, and we observed a co-integration frequency greater than 70% for the genes carried on separate plasmids. We observed no preferential integration of any particular gene(s), Genetic analysis confirmed Mendelian segregation of the transgenes in subsequent generations. We report, for the first time, generation and analysis of transgenic rice lines carrying genes effective against more than one taxa of pathogen or pest, substantiating that particle bombardment represents an effective way to introduce unlinked complex multiple traits into plants.
引用
收藏
页码:552 / 563
页数:12
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