Pollen Mediated Gene Flow in GM Crops: the Use of Herbicides as Markers for Detection. the Case of Wheat

Loureiro, Íñigo; Escorial, Concepción; Santin, I.; Chueca, Cristina

doi:10.5772/13042

Cited by 2 publications

(2 citation statements)

References 37 publications

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“…However, some cross-pollination can occur due to transferring by the wind of viable wheat pollen. Some factors which can influence the frequency of gene transfer include spatial overlap or proximal geographic location between pollen receptors and pollen donor plants, pollen longevity and dispersal, asynchronous flowering of GM plants and their nontransgenic counterparts (Devos et al 2005;Lu and Snow 2005;Loureiro et al 2011). Pollen-mediated gene flow is not unique for genetically-modified crops; however, the process has received renewed attention within two last decades because of the new legislation on cultivars to ensure commercial co-existence of non-GM and GM grain production.…”

Section: Introductionmentioning

confidence: 98%

Assessment of the pollen-mediated transgene flow from the plants of herbicide resistant wheat to conventional wheat (Triticum aestivum L.)

2016

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Three-year field assessment of gene flow from the genetically modified herbicide-resistant spring wheat variety 'Andros' to its non-transgenic counterpart has been conducted. A circular field trial design where the wheat plants containing the bar and gfp genes were planted in a central plot, while the recipient non-transgenic plants were grown in eight compass sectors at a distance of 1-5 m from the pollen source, has been developed. Gene flow was analyzed by testing the glufosinate-based herbicide resistance in seedling progeny. The phenotypic and molecular examination of more than 712,000 germinated seeds allowed us to draw a conclusion that the pollenmediated transgene flow might occur at a low frequency (\0.8 %) even if the nontransgenic wheat was located in the proximity to its transgenic counterpart. The strong asymmetric distribution of gene flow and the maximum outcrossing rate were detected in compass sectors following the direction of the dominant wind. The gene flow rate averaged over all wind direction varied in different years from 0.134 to 0.416 %. The dramatic reduction in transgene flow frequencies was observed while increasing the distance between transgenic and non-transgenic plots. The rise of average gene flow due to significant increase of the transgene pollen area was not confirmed statistically. These results predict that the pollen-mediated transgene flow in spring wheat can be maintained at negligible levels while the existence of a short isolation distance in order to prevent contamination of adjacent non-GM wheat.

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Section: Introductionmentioning

confidence: 98%

Assessment of the pollen-mediated transgene flow from the plants of herbicide resistant wheat to conventional wheat (Triticum aestivum L.)

2016

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“…To cross between two self-pollinated genotypes can give a high rate of success for the desired trait due to purity of genotype. All of genotypes don't show the same ability in crosses (Weatherspoon, 1970;Loureiro et al, 2011). Because pollen receptivity of stigma of a genotype is dependent on environmental conditions and genetically structure of genotypes (De Vries, 1971).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Hybrid Seeds of Three-Way and Single Cross for Grain Number and Weight in Bread and Durum Wheat

Yıldırım

Çakmak

2018

Turkish JAF Sci.Tech.

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The hybrid seeds obtained by crossing in wheats should be heavier and a greater number of grains per combination because of more variation and to created powerful plants for next year generations. Therefore, this study was conducted during the winter growing season of [2005][2006] in Transitional Zone Agricultural Research Institute in Eskişehir and to determine the hybrid seeds of single cross and three-way cross compared to each other for 10-grains weight (TGW) and grain number per combination (GC) in separately bread wheat and durum wheat. 224 F1s for single cross and 326 F1s for three-way cross in bread wheat and 56 F1s for single cross and 66 F1s for three-way cross in durum wheat were produced. According to results, GC and TGW in bread wheats were higher values than durum wheats both in single cross and three-way cross. The GC values in three-way cross had higher variation (68.9%) compared the others. The separately mean of GC and TGW of hybrids in single cross both in bread and durum wheat were lower than the means of hybrids in three-way cross (with ratios of 32% and 16.7%, respectively). In brief: threeway cross had more performance for studied traits in wheat hybrids compared to single cross. The reason of such an outcome can be demonstrated in the future by genetic studies.

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Pollen Mediated Gene Flow in GM Crops: the Use of Herbicides as Markers for Detection. the Case of Wheat

Cited by 2 publications

References 37 publications

Assessment of the pollen-mediated transgene flow from the plants of herbicide resistant wheat to conventional wheat (Triticum aestivum L.)

Assessment of the pollen-mediated transgene flow from the plants of herbicide resistant wheat to conventional wheat (Triticum aestivum L.)

Evaluation of Hybrid Seeds of Three-Way and Single Cross for Grain Number and Weight in Bread and Durum Wheat

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