1
|
Lee MS, Anderson EK, Stojšin D, McPherson MA, Baltazar B, Horak MJ, de la Fuente JM, Wu K, Crowley JH, Rayburn AL, Lee DK. Assessment of the potential for gene flow from transgenic maize (Zea mays L.) to eastern gamagrass (Tripsacum dactyloides L.). Transgenic Res 2017; 26:501-514. [PMID: 28466411 PMCID: PMC5504203 DOI: 10.1007/s11248-017-0020-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 04/24/2017] [Indexed: 10/24/2022]
Abstract
Eastern gamagrass (Tripsacum dactyloides L.) belongs to the same tribe of the Poaceae family as maize (Zea mays L.) and grows naturally in the same region where maize is commercially produced in the USA. Although no evidence exists of gene flow from maize to eastern gamagrass in nature, experimental crosses between the two species were produced using specific techniques. As part of environmental risk assessment, the possibility of transgene flow from maize to eastern gamagrass populations in nature was evaluated with the objectives: (1) to assess the seeds of eastern gamagrass populations naturally growing near commercial maize fields for the presence of a transgenic glyphosate-tolerance gene (cp4 epsps) that would indicate cross-pollination between the two species, and (2) to evaluate the possibility of interspecific hybridization between transgenic maize used as male parent and eastern gamagrass used as female parent. A total of 46,643 seeds from 54 eastern gamagrass populations collected in proximity of maize fields in Illinois, USA were planted in a field in 2014 and 2015. Emerged seedlings were treated with glyphosate herbicide and assessed for survival. An additional 48,000 seeds from the same 54 eastern gamagrass populations were tested for the presence of the cp4 epsps transgene markers using TaqMan® PCR method. The results from these trials showed that no seedlings survived the herbicide treatment and no seed indicated presence of the herbicide tolerant cp4 epsps transgene, even though these eastern gamagrass populations were exposed to glyphosate-tolerant maize pollen for years. Furthermore, no interspecific hybrid seeds were produced from 135 hand-pollination attempts involving 1529 eastern gamagrass spikelets exposed to maize pollen. Together, these results indicate that there is no evidence of gene flow from maize to eastern gamagrass in natural habitats. The outcome of this study should be taken in consideration when assessing for environmental risks regarding the consequence of gene flow from transgenic maize to its wild relatives.
Collapse
Affiliation(s)
- Moon-Sub Lee
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, 1102 S. Goodwin Ave., Urbana, IL, 61801, USA
| | - Eric K Anderson
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, 1102 S. Goodwin Ave., Urbana, IL, 61801, USA
| | - Duška Stojšin
- Monsanto Company, 800 North Lindbergh Blvd., St. Louis, MO, 63167, USA
| | - Marc A McPherson
- Monsanto Company, 800 North Lindbergh Blvd., St. Louis, MO, 63167, USA
| | - Baltazar Baltazar
- Monsanto Company, 800 North Lindbergh Blvd., St. Louis, MO, 63167, USA
| | - Michael J Horak
- Monsanto Company, 800 North Lindbergh Blvd., St. Louis, MO, 63167, USA
| | - Juan Manuel de la Fuente
- Monsanto Company, Park Plaza Torre II, 504 Javier Barros Sierra Ave., Col. Santa Fe, Del. Alvaro Obregon, CP 01210, Mexico, DF, Mexico
| | - Kunsheng Wu
- Monsanto Company, 700 Chesterfield Parkway W., St. Louis, MO, 63017, USA
| | - James H Crowley
- Monsanto Company, 700 Chesterfield Parkway W., St. Louis, MO, 63017, USA
| | - A Lane Rayburn
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, 1102 S. Goodwin Ave., Urbana, IL, 61801, USA
| | - D K Lee
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, 1102 S. Goodwin Ave., Urbana, IL, 61801, USA.
| |
Collapse
|
2
|
Gurney AL, Grimanelli D, Kanampiu F, Hoisington D, Scholes JD, Press MC. Novel sources of resistance to
Striga hermonthica
in
Tripsacum dactyloides
, a wild relative of maize. NEW PHYTOLOGIST 2003; 160:557-568. [PMID: 33873658 DOI: 10.1046/j.1469-8137.2003.00904.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Affiliation(s)
- A. L. Gurney
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK
| | - D. Grimanelli
- CIMMYT‐Mexico, Applied Biotechnology Centre, Apartado Postal 6‐641, 06600 Mexico DF, Mexico
| | | | - D. Hoisington
- CIMMYT‐Mexico, Applied Biotechnology Centre, Apartado Postal 6‐641, 06600 Mexico DF, Mexico
| | - J. D. Scholes
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK
| | - M. C. Press
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK
| |
Collapse
|
3
|
Bernard S, Bernard M. Creating new forms of 4x, 6x and 8x primary triticale associating both complete R and D genomes. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1987; 74:55-59. [PMID: 24241456 DOI: 10.1007/bf00290083] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/1986] [Accepted: 12/17/1986] [Indexed: 06/02/2023]
Abstract
Strains of Aegilops squarrosa L. and Ae. ventricosa L. were pollinated either by Secale cereale L. or tetraploid triticale. Using in vitro culture of immature F1 embryos, the four corresponding hybrids were obtained. Successful doubling occurred following colchicine treatment, leading to the creation of new amphidiploid structures (C1 plants). These correspond to primary triticale forms involving, at three different levels of ploidy, both R and D full complements. The various combinations were compared for their response at successive steps of the process. Crosses involving Ae. squarrosa present a higher fruit setting than those with Ae. ventricosa, which in contrast yield colchicine treated-plants with better grain fertility. Experimental data on the cytological behaviour and fertility of colchicine-treated as well as amphidiploid plants are presented. The importance of this material in triticale breeding is discussed.
Collapse
Affiliation(s)
- S Bernard
- Station d'Amélioration des Plantes, INRA - Domaine de Crouelle, F-63039, Clermont-Ferrand Cedex, France
| | | |
Collapse
|