Hybridisation within Brassica and allied genera: evaluation of potential for transgene escape |
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Authors: | Richard G FitzJohn Tristan T Armstrong Linda E Newstrom-Lloyd Aaron D Wilton Michael Cochrane |
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Institution: | (1) Landcare Research, PO Box 40, Lincoln, 7640, Canterbury, New Zealand;(2) Landcare Research, Private Bag 92 170, Auckland, 1142, New Zealand;(3) Present address: Australian National University, Daley Rd.,, Canberra, ACT 0200, Australia |
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Abstract: | Determining the potential for hybridisation between transgenic crops and their relatives is a major component of risk assessment.
Recent assessments of the extent of reproductive compatibility between crops and their relatives draw heavily on existing
data from experimental crosses to infer the likelihood of hybridisation and introgression. Since the literature in this area
continues to grow at a rapid pace, it is essential that such analyses can be easily updated. We used a database approach to
assemble data on reproductive compatibility for eight crop species in Brassica, Raphanus and Sinapis, using data from hand pollination, spontaneous (unassisted) pollination and trials using in vitro techniques (e.g. embryo
rescue), incorporating 326 studies and 216 species combinations. We found many reports for major crop species (B. juncea, B. napus, B. oleracea and B. rapa), but fewer for minor crops (B. carinata, B. nigra, Raphanus sativus and Sinapis alba). Many species combinations remain untested, and we highlight these information gaps. While reproductively incompatible species
can be discounted as targets for transgene escape, compatible species must be evaluated further in the particular context
where transgenic crops are grown. Because the data is retained in a database in a relatively unmodified form, multiple views
of the data can be generated; this review represents one possible view of this data. Our approach also allows new data to
be easily incorporated into future reanalyses and can be extended to other crop groups, and as such is a useful method of
assembling, analysing and sharing data for risk assessment.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. |
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Keywords: | Brassica napus Database Gene flow Interspecific hybridisation Risk assessment Transgenic crops |
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