Within-population variation in hybridisation and transgene transfer between wild Brassica rapa and Brassica napus in the UK
Article first published online: 18 APR 2006
2006 Association of Applied Biologists
Annals of Applied Biology
Volume 148, Issue 2, pages 147–155, April 2006
How to Cite
Pallett, D.W., Huang, L., Cooper, J.I. and Wang, H. (2006), Within-population variation in hybridisation and transgene transfer between wild Brassica rapa and Brassica napus in the UK. Annals of Applied Biology, 148: 147–155. doi: 10.1111/j.1744-7348.2006.00049.x
- Issue published online: 18 APR 2006
- Article first published online: 18 APR 2006
- Received: 23 November 2005; revised versionaccepted: 7 February 2006.
- Brassica napus;
- Brassica rapa;
- flow cytometry;
- GM risk assessment;
- transgene flow
Several studies in Europe and North America have shown that cultivated Brassica napus will readily hybridise with wild Brassica rapa but at widely different frequencies. To understand the implications of this phenomenon with regard to transgene flow, we examined the rate at which cultivated B. napus cv. Westar containing a capsid (coat protein, CP)-coding sequence from Turnip mosaic virus (Potyvirus) hybridised under glasshouse conditions with wild B. rapa from Culham, in Oxfordshire, UK. We found that the hybridisation rate, as judged using simple sequence repeat (SSR)-PCR and primer oligonucleotides specific for either the C or the A genomes in progeny from individual crosses varied from 5% to 100%. In hybrids (F1 progeny), transgene transfer was always observed (inferred by SSR-PCR) when hybrids were detected. Our observations revealed a hitherto unrecorded source of variability in transgene flow to wild UK B. rapa.