Crop ferality: Implications for novel trait confinement

Abstract Ferality is observed in many crop species wherein individuals of the cultivated crop reproduce successfully and establish a self-perpetuating population in natural or semi-natural habitats. Feral populations can evolve to differ from their parent populations and lose traits associated with domestication including for example, a lack of seed dormancy. Hybridization between wild and cultivated forms of cropped species may facilitate ferality. If GM plants become feral, they can establish populations in natural and semi-natural environments and act as both a source and sink for novel traits. The presence of novel traits may facilitate the persistence of feral populations if the novel trait confers a selective advantage (e.g. drought tolerance, salinity tolerance, pest and disease resistance), but there is no evidence yet that transgenesis per se facilitates ferality. In some cases and in some jurisdictions, the introduction of GM crops will require assurances of effective segregation and novel trait confinement. The existence of feral crop populations can make novel trait confinement more difficult. Monitoring and management of feral populations will be required for effective novel trait confinement.

[1]  M. Marvier,et al.  Can crop transgenes be kept on a leash , 2005 .

[2]  Jay R Reichman,et al.  Evidence for landscape-level, pollen-mediated gene flow from genetically modified creeping bentgrass with CP4 EPSPS as a marker. , 2004, Proceedings of the National Academy of Sciences of the United States of America.

[3]  M. Crawley,et al.  Spatially structured population dynamics in feral oilseed rape , 2004, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[4]  M. Moloney,et al.  Mitigation of establishment of Brassica napus transgenes in volunteers using a tandem construct containing a selectively unfit gene. , 2006, Plant biotechnology journal.

[5]  P. Boudry,et al.  Genetic diversity and gene flow between wild, cultivated and weedy forms of Beta vulgaris L. (Chenopodiaceae), assessed by RFLP and microsatellite markers , 1999, Theoretical and Applied Genetics.

[6]  Christopher A. Gilligan,et al.  Which traits promote persistence of feral GM crops? Part 1:implications of environmental stochasticity , 2005 .

[7]  A. Snow,et al.  FITNESS OF HYBRIDS BETWEEN WEEDY AND CULTIVATED RADISH: IMPLICATIONS FOR WEED EVOLUTION , 2001 .

[8]  Christian Damgaard,et al.  Gene flow of oilseed rape (Brassica napus) according to isolation distance and buffer zone , 2005 .

[9]  C. Lavigne,et al.  Modelling and estimating pollen movement in oilseed rape (Brassica napus) at the landscape scale using genetic markers , 2006, Molecular ecology.

[10]  J. W. Crawford,et al.  Regional patterns of gene flow and its consequence for GM oilseed rape , 1999 .

[11]  C. Sengupta-Gopalan,et al.  Targeting transgene expression in research, agricultural, and environmental applications: Promoters used in plant transformation , 2007, In Vitro Cellular & Developmental Biology - Plant.

[12]  N. Hautekèete,et al.  Transgenic weed beets: possible, probable, avoidable? , 2002 .

[13]  C. Ridley,et al.  Weed evolution after crop gene introgression: greater survival and fecundity of hybrids in a new environment. , 2006, Ecology letters.

[14]  A. M. Timmons,et al.  Problems of risk assessment with genetically modified oilseed rape. , 1995 .

[15]  P. Dale.  The impact of hybrids between genetically modified crop plants and their related species: general considerations , 1994 .

[16]  L L Wolfenbarger,et al.  The ecological risks and benefits of genetically engineered plants. , 2000, Science.

[17]  N. Faure,et al.  Potential gene flow from cultivated sunflower to volunteer, wild Helianthus species in Europe , 2002 .

[18]  L. Campbell,et al.  Can feral radishes become weeds , 2005 .

[19]  N. Ellstrand,et al.  Crop‐to‐weed gene flow in the genus Sorghum (Poaceae): Spontaneous interspecific hybridization between johnsongrass, Sorghum halepense, and crop sorghum, S. bicolor , 1996 .

[20]  C. Yen,et al.  Chromosome location of the gene for brittle rachis in the Tibetan weedrace of common wheat , 1998, Genetic Resources and Crop Evolution.

[21]  C. R. Linder,et al.  Assessing the risks of transgene escape through time and crop‐wild hybrid persistence , 1994 .

[22]  J. Gressel,et al.  Sorghum and its weedy hybrids. , 2005 .

[23]  Michael J. Crawley,et al.  Seed limitation and the dynamics of feral oilseed rape on the M25 motorway , 1995, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[24]  D. J. Perry,et al.  Adventitious presence of GMOs: Scientific overview for Canadian grains , 2006 .

[25]  R. C. Van Acker,et al.  Development of quality assurance protocols to prevent GM-contamination of organic crops , 2007 .

[26]  C. Lavigne,et al.  High diversity of oilseed rape pollen clouds over an agro‐ecosystem indicates long‐distance dispersal , 2005, Molecular ecology.

[27]  M. S. Khan,et al.  Fluorescent antibiotic resistance marker for tracking plastid transformation in higher plants , 1999, Nature Biotechnology.

[28]  THE EVOLUTION OF CALIFORNIA'S WILD RADISH HAS RESULTED IN THE EXTINCTION OF ITS PROGENITORS , 2006, Evolution; international journal of organic evolution.

[29]  Steven J. Shirtliffe,et al.  Secondary seed dormancy prolongs persistence of volunteer canola in western Canada , 2003, Weed Science.

[30]  P. Boudry,et al.  The origin and evolution of weed beets: consequences for the breeding and release of herbicide-resistant transgenic sugar beets , 1993, Theoretical and Applied Genetics.

[31]  A. Ferrero,et al.  Modeling population dynamics to overcome feral rice in rice. , 2005 .

[32]  Yoshie Murakami,et al.  Genetic variation in radish (Raphanus sativus L.) germplasm from Pakistan using morphological traits and RAPDs , 1998, Genetic Resources and Crop Evolution.

[33]  Stéphane M. McLachlan,et al.  Gene Flow and Multiple Herbicide Resistance in Escaped Canola Populations , 2008, Weed Science.

[34]  D. Hemming.  Gene flow and agriculture: relevance for transgenic crops. , 1999 .

[35]  M. Crawley,et al.  Biotechnology: Transgenic crops in natural habitats , 2001, Nature.

[36]  Loren H. Rieseberg,et al.  Fecundity selection in a sunflower crop-wild study: can ecological data predict crop allele changes? , 2002 .

[37]  A. Young,et al.  Ecological risk assessment of transgenic pasture plants: a community gradient modelling approach , 2004 .

[38]  Aurélie Garnier,et al.  Using a spatial and stage-structured invasion model to assess the spread of feral populations of transgenic oilseed rape , 2006 .

[39]  A. Dhingra,et al.  Stable transformation of the cotton plastid genome and maternal inheritance of transgenes , 2004, Plant Molecular Biology.

[40]  A. Messean,et al.  Persistence of oilseed rape (Brassica napus L.) outside of cultivated fields , 2001, Theoretical and Applied Genetics.

[41]  Henry Daniell,et al.  Molecular strategies for gene containment in transgenic crops , 2002, Nature Biotechnology.

[42]  S. Warwick,et al.  15 Issues of Ferality or Potential for Ferality in Oats, Olives, the Vigna Group, Ryegrass Species, Safflower, and Sugarcane , 2005 .

[43]  N. Ellstrand,et al.  FITNESS OF INTERSPECIFIC HYBRIDS IN THE GENUS SORGHUM: PERSISTENCE OF CROP GENES IN WILD POPULATIONS , 1997 .

[44]  H. Beckie,et al.  Transgenic oilseed rape along transportation routes and port of Vancouver in western Canada. , 2006, Environmental biosafety research.

[45]  P. St. Amand,et al.  Relative fitness of imazamox-resistant common sunflower and prairie sunflower , 2005, Weed Science.

[46]  C. Neal Stewart,et al.  Genetically Modified Planet: Environmental Impacts of Genetically Engineered Plants , 2004 .

[47]  D. Bartsch,et al.  Feral beets - with help from the maritime wild? , 2005 .

[48]  H. R. Prendeville,et al.  Ecological Effects of Transgenic Crops and the Escape of Transgenes into Wild Populations , 2004 .

[49]  N. Ellstrand,et al.  Dangerous Liaisons?: When Cultivated Plants Mate with Their Wild Relatives , 2003 .

[50]  D. Levin.  The Seed Bank as a Source of Genetic Novelty in Plants , 1990, The American Naturalist.

[51]  O. Rognli,et al.  Effects of distance and pollen competition on gene flow in the wind-pollinated grass Festuca pratensis Huds , 2000, Heredity.

[52]  C. N. Stewart,et al.  Genetic modification: Transgene introgression from genetically modified crops to their wild relatives , 2003, Nature Reviews Genetics.

[53]  I. Davenport,et al.  A direct regional scale estimate of transgene movement from genetically modified oilseed rape to its wild progenitors , 2000, Molecular ecology.

[54]  M. Crawley,et al.  Ecology of transgenic oilseed rape in natural habitats , 1993, Nature.

[55]  Case R. Medlin,et al.  Feral Rye (Secale cereale) in Agricultural Production Systems1 , 2006, Weed Technology.

[56]  David Lee,et al.  Evaluating genetic containment strategies for transgenic plants. , 2006, Trends in biotechnology.

[57]  S. Warwick,et al.  The Frequency and Persistence of Volunteer Canola (Brassica napus) in Québec Cropping Systems* , 2002, Weed Technology.

[58]  Christopher A. Gilligan,et al.  Which traits promote persistence of feral GM crops? Part 2: implications of metapopulation structure , 2005 .

[59]  J. Bullock,et al.  Fitness of hybrids between rapeseed (Brassica napus) and wild Brassica rapa in natural habitats , 2006, Molecular ecology.

[60]  J. Sweet,et al.  Introgression from Genetically Modified Plants into Wild Relatives , 2004 .

[61]  B. Jank,et al.  Co-existence of agricultural production systems. , 2006, Trends in biotechnology.

[62]  J. Gressel,et al.  Crop ferality and volunteerism , 2005 .

[63]  Broder Breckling,et al.  A review on Interspecific Gene Flow from Oilseed Rape to Wild Relatives , 2004 .

[64]  Honor C. Prentice,et al.  Gene Flow and Introgression from Domesticated Plants into Their Wild Relatives , 1999 .

[65]  I. Kowarik,et al.  Urban ornamentals escaped from cultivation. , 2005 .

[66]  P. St. Amand,et al.  Gene flow from imidazolinone-resistant domesticated sunflower to wild relatives , 2003, Weed Science.

[67]  Aurélie Garnier,et al.  Stochastic modelling of feral plant populations with seed immigration and road verge management. , 2006 .

[68]  C. Haag,et al.  Competitiveness of transgenic sugar beet resistant to beet necrotic yellow vein virus and potential impact on wild beet populations , 1996 .

[69]  N. Ellstrand,et al.  Feral rye - evolutionary origins of a weed. , 2005 .

[70]  D. Levin.  The Recurrent Origin of Plant Races and Species , 2009 .

[71]  D. V. Chin,et al.  Wild and weedy rice in rice ecosystems in Asia : a review , 2000 .

[72]  Jody Hey,et al.  The limits of selection during maize domestication , 1999, Nature.

[73]  B. Valverde,et al.  The damage by weedy rice - can feral rice remain undetected? , 2005 .

[74]  Z. Ni,et al.  Genetic relationships and diversity among Tibetan wheat, common wheat and European spelt wheat revealed by RAPD markers , 1998, Euphytica.

[75]  C. Yen,et al.  Chromosome location of the gene for the hulled character in the Tibetan weedrace of common wheat , 1999, Genetic Resources and Crop Evolution.

[76]  J. Osborne,et al.  The effect of patch size and separation on bumblebee foraging in oilseed rape: implications for gene flow , 2004 .

[77]  C. Johnstone,et al.  Microsatellite amplification in Brassica napus cultivars: Cultivar variability and relationship to a long-term feral population , 2004, Euphytica.

[78]  A. Raybould,et al.  Crop genetics: Reducing transgene escape routes , 1998, Nature.

[79]  Jack Brown,et al.  Gene transfer between canola (Brassica napus L. and B. campestris L.) and related weed species , 1996 .

[80]  N. Ellstrand,et al.  Origin and genetic structure of feral rye in the western United States , 2006, Molecular ecology.

[81]  A. Snow,et al.  Gene Flow from Genetically Modified Rice and Its Environmental Consequences , 2005 .

[82]  P. Dale,et al.  Herbicide-tolerant crops in agriculture: oilseed rape as a case study , 2002 .

[83]  T. Klinger,et al.  Engineered Genes in Wild Populations: Fitness of Weed-Crop Hybrids of Raphanus Sativus , 1994 .

[84]  P. Westra,et al.  The Seedbank Dynamics of Feral Rye Secale cereale1 , 2000, Weed Technology.

[85]  S. Warwick,et al.  Crops come from wild plants - how domestication, transgenes, and linkage together shape ferality. , 2005 .