NDLI: A- or C-chromosomes, does it matter for the transfer of transgenes from Brassica napus

Content Provider	Springer Nature Link
Author	Tomiuk, J. Hauser, T. P. Bagger Jørgensen, R.
Copyright Year	2000
Abstract	Introgression of genes from allotetraploid Brassica napus into its diploid wild relative B. rapa is generally considered to be inevitable. As a means to minimize a potential ecological risk in environments where B. rapa is growing, the insertion of transgenes into chromosome regions of B. napus with a very low probability of transfer to backcross generations with B. rapa has been proposed. Recently, the progeny of four backcross generations between transgenic herbicide-tolerant B. napus and B. rapa was studied in selection experiments (Metz et al. 1997). The rapid decrease in the frequency of herbicide-tolerant plants was explained by selection against the C-chromosomes of B. napus in favor of the homeologous A-chromosomes. Obviously, such C-chromosomes could be potential candidates as safe integration sites for transgenes. We considered these safety aspects using a simple population genetic model. Theory and experiments, however, do not favor the chromosomes of B. napus as safe candidates with respect to the introgression of transgenes into wild populations of B. rapa.
Starting Page	750
Ending Page	754
Page Count	5
File Format	PDF
ISSN	00405752
Journal	Theoretical and Applied Genetics
Volume Number	100
Issue Number	5
e-ISSN	14322242
Language	English
Publisher	Springer-Verlag
Publisher Date	2000-03-28
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Biotechnology Agronomy and Crop Science

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