RESPONSE OF CULTIVARS AND BREEDING LINES OF LYCOPERSICON SPP, TO ALTERNARIA SOLANI

摘要

From 1990 to 1995 more than 650 tomato cultivars, breeding lines, and accessions of related species, were evaluated for resistance to early blight, caused by Alternaria solani. The levels of resistance for selected test lines are reported here. Promising material for use in early blight resistance breeding programs include the moderately resistant tomato breeding lines HRC90.145, HRC90.158, and HRC90.159 and the interspecific breeding lines HRC90.303, HRC91.279, and HRC91.341. Only limited success has been attained in incorporating resistance from the Lycopersicon hirsutum and L. peruvianum lines showing very high levels of resistance. The L. hirsutum lines LA2100, LA2124, and LA2204 have shown promise in producing interspecific lines in which the association between disease resistance and detrimental horticultural traits has been weakened.