“…E-mail: candidows.melhorista@gmail.com. (Braz et al, 2007;Castoldi et al, 2012;Galatti et al, 2012;Nunes et al, 2016;Souza et al, 2011). The second is related to crossing of loose-leaf lettuce genitors and differentiating lettuces of Dm genes resistant to B. lactucae, with the intention of obtaining new lineages with positive agronomic and B. lactucae resistant traits (Castoldi et al, 2014).…”