Temporal dynamics of detected transgenes in maize landraces in their center of origin

Autores/as

DOI:

https://doi.org/10.22201/ib.20078706e.2019.90.2653

Palabras clave:

Zea mays, Diversity, Priority Terrestrial Region, Real-time PCR, GMO detection

Resumen

The first report of transgenic maize in its center of origin was published in 2001 in Oaxaca, Mexico. Subsequent reports were controversial: most of the maize samples analyzed during 2001–2004 were negative, and only few samples were positive for the presence of transgenic elements in different localities and years. No further reports have been published to date. The purpose of this paper is to publish records for the presence of transgenic maize in Priority Terrestrial Areas (PTR) of Oaxaca state, and to contribute for the understanding of the movement of transgenic maize through seed management practices. During 2008–2012, 74 municipalities and 134 localities, belonging to three PTRs were monitored. 1125 farmers were surveyed on practices associated with maize management, and 1206 maize samples were obtained and analyzed using molecular methods. Adventitious presence of transgenic sequences was detected in 1.8% of the samples. All positive samples came from municipalities belonging to the same PTR. Farmers' responses indicated that there is a high movement of seed among localities, but also seeds from other areas of the country are introduced. The data show episodes of occurrence and disappearance of the transgenes, indicating a highly dynamic spatio-temporal replacement over time.

Biografía del autor/a

Beatriz Rendón-Aguilar, UNIVERSIDAD AUTÓNOMA METROPOLITANA

Biología. Investigadora.

Profesor Titular C, Tiempo Completo

Departamento de Biología,

Área de Ecología

 

Luis Alberto Bernal-Ramírez, UNIVERSIDAD AUTÓNOMA METROPOLITANA

DEPARTAMENTO DE BIOLOGÍA

ESTUDIANTE DOCTORADO

David Bravo-Avilez, UNIVERSIDAD AUTÓNOMA METROPOLITANA

DEPARTAMENTO DE BIOLOGIA

PROFESOR ASOCIADO POR TIEMPO DETERMINADO

Martha Graciela Rocha-Munive, UNIVERSIDAD AUTÓNOMA METROPOLITANA

DEPARTAMENTO DE BIOLOGÍA 

ESTUDIANTE DE POSTDOCTORADO

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Publicado

2019-06-27

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CONSERVACIÓN