to identify infected plants. Data were utilized if the plants used as susceptible controls became infected
by TSWV.
L. esculentum 854-8 and 701-4, developed from L. chilense, react as highly susceptible to
TSWV after mechanical inoculation, in spite of their tolerant behaviour in field conditions (Table 1).
Partial resistance was detected in L. chilense LA 2884 against the two TSWV isolates. Different
accessions of L. chilense have been tested by other authors, giving promising results (lizuka et al.,
1993; Krishna Kumar et al., 1993; Stevens et al., 1994). PI-126944 was immune to both isolates,
confirming previous results obtained by authors (Diez et al., 1995). This also agrees with those
obtained by other researchers (Paterson et al., 1989). Resistance of PI-143679 and Pl-126441
accessions was very high and appear to be dependent on the isolate. The resistance found in L.
peruvianum accessions appears to be useful for their exploitation in breeding for resistance to TSWV.
PI-126944 seems to be the best source for this purpose. However, in previous experiments, the
authors have observed less severe crossability barriers with L. esculentum in PI-143679. This
characteristic made it specially interesting for their utilization as a source of resistance to TSWV in
breeding programs.
Table 1: Resistance reactions to TSWV of some accessions of Lycopersicon.
No navigation control above? Click here!
