Several different accessions of S. chilense have been used as sources of begomovirus resistance genes. Zamir et al. (1994) used LA1969 as a source of Ty-1 gene in chromosome 6 (ca. 8 cM). LA1969 was also the source of resistance against Tomato yellow leaf curl virus (TYLCV) for new lines developed in Cuba (Piňón et al., 2005). Scott and his team (Agrama and Scott, 2006; Scott, 2001; Scott et al...