HomeMy WebLinkAboutCOM 0882.012 2006-2008
Agriculture and Agri-Food Canada (AAFC), Eastern Cereal and Oilseeds
Research Center, Central Experimental Farm, Ottawa, ON, Canada K1A
OC6.
S. I. WARWICK* *Agriculture and Agri-Food Canada (AAFC), Eastern
Cereal and Oilseeds Research Center, Central Experimental Farm,
Ottawa, ON, Canada K1A OC6,, A. LtGPREt tAAFC-Saskatoon, 107
Science Place, Saskatoon, SK, Canada S7N 0X2, , M.-J. SIMARD$
$AAFC-CRDCGC, 2560 Boul. Hochelaga, Qu6bec, QC, Canada G1V 2J3
and T. JAMES* *Agriculture and Agri-Food Canada (AAFC), Eastern
Cereal and Oilseeds Research Center, Central Experimental Farm,
Ottawa, ON, Canada K1A OC6, *Agriculture and Agri-Food Canada
(AAFC), Eastern Cereal and Oilseeds Research Center, Central
Experimental Farm, Ottawa, ON, Canada K1A OC6, tAAFC-Saskatoon,
107 Science Place, Saskatoon, SK, Canada S7N 0X2, $AAFC-CRDCGC,
2560 Boul. Hochelaga, Qu6bec, QC, Canada G1V 2J3
Correspondence: Dr Suzanne Warwick. Fax: (+01) 613 759-1701; E-mail:
warwicksa-agr.gc. ca
Comm, 06181 AK * /A
Ref. To:
Ref. Dose N 24 t1
Do escaped transgenes persist in nature?
The case of an herbicide resistance transgene in a weedy Brassica rapa
population
To cite this article: S. I. WARWICK, A. LEGERE, M.-J. SIMARD, T.
JAMES
Molecular Ecology 2007 Oct 29 2007; (advanced online pre-publication)
[authors details at end]
http://www.blackwell-svnergv.com/doi/abs/10.1111 /j.1365-
294X.2007.03567.x
Keywords: Brassica napus, Brassica rapa, gene flow, genetically modified
crops, hybridization, transgene escape
Abstract
The existence of transgenic hybrids resulting from transgene escape from
genetically modified (GM) crops to wild or weedy relatives is well
documented but the fate of the transgene over time in recipient wild
species populations is still relatively unknown. This is the first report of the
persistence and apparent introgression, i.e. stable incorporation of genes
from one differentiated gene pool into another, of an herbicide resistance
transgene from Brassica napus into the gene pool of its weedy relative,
Brassica rapa, monitored under natural commercial field conditions.
Hybridization between glyphosate-resistant [herbicide resistance (HR)] B.
napus and B. rapa was first observed at two Qu6bec sites, Ste Agathe and
St Henri, in 2001. B. rapa populations at these two locations were
monitored in 2002, 2003 and 2005 for the presence of hybrids and
transgene persistence. Hybrid numbers decreased over the 3-year period,
from 85 out of -200 plants surveyed in 2002 to only five out of 200 plants in
2005 (St Henri site). Most hybrids had the HR trait, reduced male fertility,
intermediate genome structure, and presence of both species-specific
amplified fragment length polymorphism markers. Both F1 and backcross
hybrid generations were detected. One introgressed individual, i.e. with the
HR trait and diploid ploidy level of B. rapa, was observed in 2005. The latter
had reduced pollen viability but produced -480 seeds. Forty-eight of the 50
progeny grown from this plant were diploid with high pollen viability and 22
had the transgene (1:1 segregation). These observations confirm the
persistence of the HR trait over time. Persistence occurred over a 6-year
period, in the absence of herbicide selection pressure (with the exception
of possible exposure to glyphosate in 2002), and in spite of the fitness
cost associated with hybridization.
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2008
Dust off your hat and strap on your spurs for the New Year's most exciting
event! It's a fundraiser to help build out the NEW UH-Hilo Equestrian Center
as the premier educational and community equestrian center in East Hawaii.
Save the date!
Saturday, February 23, 2008, from 2:00 to 6:00 pm
A Paniolo
"Blue Jeans and Black Tie" Barbecue
at the UH-Hilo Ag Farm
(Ikaika Street, makai side of Hwy 11 at the 5-mile marker)
? Beef Barbecue ? Silent and Live Auctions
? Live Music ? Special Guests & Entertainment
A special celebration honoring our founding supporter, Mrs. Kapua Wall Heuer
To contribute to the auction: 0
Sarah Blanchard 934-9246 sblancha@hawaii.edu
To become an individual or business sponsor: UrnvERsrrY
Andrea Furuli phone 933-3112 furuli@hawaii.edu OFHUD
HAwAm
To reserve tickets ($100 each): CAFNRM office 974-7393
Cowboy Up!
2008
A paniolo beef and barbecue fundraiser for the
College of Agriculture & Natural Resource Management (CAFNRM)
2:00 pm - 6:00 pm * February 23, 2008
UH Hilo Equestrian Center - Panaewa Farm
(Old Volcano Highway-Mile Marker 5)
Sponsorship Opportunities
Includes 2 event tickets, unless a full donation is preferred.
Bronze Longhorn Legacy Sponsors: $ 250
Silver Spur Sponsors: $ 500
Golden Palomino Sponsors: $19000
Sponsors will be recognized with a name plague on the Community Wall of Donors and listed as event sponsors
in the event program and all promotional materials.
Please call Andrea Fumli at 933-3112, or email: furuli(d)hawaii.edu for more information or to become a sponsor.
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