“…Although melon is susceptible to Agrobacterium infection and is responsive to regeneration from explants derived from the cotyledon (Dirks and van Buggenum, 1989) and callus (Moreno et al, 1985), the transformation regeneration frequency varies widely among cultivars (Galperin et al, 2003;Akasaka-Kennedy et al, 2004;Rhimi et al, 2006;Hao et al, 2011) and sources of explants (Fang and Grumet, 1990;Guis et al, 2000;Ren et al, 2012). Moreover, in melon transformation, a high frequency of tetraploid and false-positive regenerants are commonly observed.…”