“…Great efforts have been made to adapt gene transfer into cereals via A. tumefaciens as they are resistant to such maneuvers (FRAME et al, 2002;2011). This recalcitrance is related to two different aspects: a) the low in vitro response (CARVALHO et al, 1997;FRAME et al, 2006;GONZÁLES et al, 2012;GRANDO et al, 2013) e b) low explant sensibility to agrobacteria infection (VENNA et al, 2003;CARVALHO et al, 2004;WANG et al, 2007), thus restricting the number of transformed maize genotypes (GONZÁLEZ et al, 2012;OMBORI et al, 2014).…”