Abstract
Tissue culture is clearly a mutagenic procedure. Although some progenies of regenerated plants may be highly productive and appear normal in all measured traits, most have detectable variation not present in the controls. The tissue culture process itself appears to be inducing these alterations as the cells proliferate in a relatively undifferentiated state. Probably all forms of mutational events that can occur in nature also happen in tissue cultured cells. However, certain mutational events appear to occur in exceedingly high frequencies in plant tissue cultures. These events may vary in frequency among species, genotypes, explant source, media, etc., but, in general, elevated mutational events appear to occur regardless of the specific cultured materials or conditions. The unusually frequent events include the following: 1) Single gene mutations; 2) Transposable element activation; 3) Quantitative trait variation; and 4) Chromosome breakage. In this paper, we will propose a hypothesis attempting to relate these four seemingly different kinds of heritable variation.
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Phillips, R.L., Kaeppler, S.M., Peschke, V.M. (1990). Do We Understand Somaclonal Variation?. In: Nijkamp, H.J.J., Van Der Plas, L.H.W., Van Aartrijk, J. (eds) Progress in Plant Cellular and Molecular Biology. Current Plant Science and Biotechnology in Agriculture, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2103-0_19
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