Abstract
There are 3 kinds of transgenicBt strains, Shanxi 94-24, Zhongxin 94, and R19, in upland cotton in China. Their transgenicBt insect-resistance cultivars or hybrids have been developed and grown by farmers. Genetic studies indicate that the resistance of the 3 transgenicBt cotton strains toHelicoverpa armigera is controlled by one pair of non-allelic dominant genes. Linkage relationship between the resistant genes of R19 and Shanxi 94-24 transgenicBt strains shows that they may be inserted in the same chromosome. F1 hybrids crossed among the 3 strains show that high levels of protection from feeding damage are the same as that of their parents. Therefore, there is no co-suppression phenomenon in many transgenic plants. The results presented here afford a fundamental reliance in developing transgenicBt insect-resistant cultivars and exploiting the heterosis of hybrids in upland cotton.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Perlak, F. J., Deaton, R. W., et al., Insect-resistant cotton plants, Bio/Technology, 1990, 8: 939.
Guo, S. D., Synthesis of CryIA insecticidal gene, Scientia Agricultura Sinica (in Chinese), 1997, 26(2): 85.
Ni, W. C., Huang, J. Q., Guo, S. D. et al., Transgenic bollworm-resistant cotton plants containing the synthetic gene coding Bacillus thuringiensis insectcidal protein, Jiangsu J. Agric, Sci (in Chinese), 1996, 12(1): 1.
Jiao, G. L., Guo, S. D., Li, S. J. et al., Cotton genetic transformation and plant regeneration, Acta Agriculturae Boreali-Sinica (in Chinese), 1997, 12(2): 82.
Tang, C. M., Zhu, X. F., Zhang, T. Z. et al., Inheritance and resistance of transgenicBt cotton line R19 to Helicoverpa armigera, J. Agric. Biotech. (in Chinese), 1997, 5(2): 194.
Flavell, R. B., Inactivation of gene expression in plants as a consequence of specific sequence duplication, Proc. Natl. Acad. Sci. USA. 1994, 91: 3490.
Matzke, M. A., Matzke, J., Scheid, O. M., Inactivation of repeated genes-DNA-DNA interaction? in Homologous Recombination and Gene Silencing in Plants (ed. Paszkowski), Dordrecht: Kluwer Academic Publishers, 1994, 271.
Hobbs, S. L. A., Thomas, D. W., DeLong, C. M. O., Transgene copy number can be positively or negatively associated with transgene expression, Plant Mol. Bio., 1993, 21: 17.
Author information
Authors and Affiliations
About this article
Cite this article
Tang, C., Sun, J., Zhu, X. et al. Inheritance of resistance toHelicoverpa armigera of 3 kinds of transgenicBt strains available in upland cotton in China. Chin.Sci.Bull. 45, 363–367 (2000). https://doi.org/10.1007/BF02909770
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02909770