MATERIALS AND METHODS
Plant materials. Plant materials from
different steps in a breeding program were
used. Accessions of L. peruvianum and L.
chilense were used in the screening of new
wild resistance sources: L. peruvianum PI-
126935 and PI-143679 are both asymptomatic
carriers of TYLCV-Sar (27). The
former has also been used in Israel as a
resistance source against TYLCV-Isr to
produce commercial tomato hybrids (28).
These accessions were supplied by the
Plant Introduction Station, USDA, Ames,