Scientists from Mexico assessed the potential impacts associated with gene
flow from transgenic maize to maize landraces in Mexico, which is the center
of origin and diversity of maize. The results are published in Transgenic
Research.

Insect resistance and herbicide tolerance traits (MON89034xMON88017) known
as Genuity? VT Triple Pro (VT3Pro) were introgressed into two Mexican
landraces, Tuxpe?o and Tabloncillo. Field trials in four locations with
varying environments were conducted to evaluate phenotypic characteristics,
plant response to stressors, and kernel composition of landraces with and
without the IR and HT traits. Materials from four backcrossing generations
were also analyzed for segregation of these GM traits.

Results showed that there were no significant differences between landraces
with and without VT3Pro traits for the characteristics observed. Segregation
analysis showed that GM traits, when introgressed into landraces, followed
Mendelian principles. These findings imply that if accidentally introgressed
into landraces through natural gene flow, VT3Pro traits would not alter
phenotypic or kernel characteristics, plant response to stressors and would
segregate like any endogenous gene.

[link.springer.com]