ISHS Acta Horticulturae 487: VI International Symposium on Processing Tomato & Workshop on Irrigation & Fertigation of Processing Tomato
TOMATO BREEDING FOR RESISTANCE TO POWDERY MILDEW (Oidium lycopersicum Che et Mass). |
| Authors: | T.A. Tereshonkova, S.I. Ignatova, N.S. Gorshkova |
| Keywords: | green-house tomato, wild species of Lycopersicon genus, methods of inoculation, resistant lines |
| Abstract:
In the end of 80th new powdery mildew, caused by Oidium licopersicum attacked the green-house tomatoes in the North-Western region of Russian Federation to result in hard damage. Breeding for tomato resistance to new powdery mildew begun with utilization of sources of resistance: L. hirsutum PL 247087, F3 (L. esculentum x L. pimpinellifolium Red Current BP 10815), F3 (L. esculentum x L. Cheesmanii K3969), F3-F4 (L.Humboldii VIR 2884 x L. esculentum)x and F3 (L. esculentum x L. hirsutum glabratum VIR 4175) selected under natural inoculation condition Also 6 combination (tested material x methods of inoculation) were tested to obtain a system of complementary express resistance test-methods. Seedling inoculation by spraying with spores suspension suggested by Lindhout (1994) is the most acceptable for primer tests of breeding material. Two methods included using of detached plant parts - lateral shoots with suspension spraying and leaves in Petry dish with inoculation by surface contact - are convenient for resistance test of growing plant during vegetation period without inoculation of whole tested plant. Combining of these 3 test-methods we've studied from 1994 resistance of more than 3000 patterns of 40 different genotypes and obtained number of lines with resistance level 0–1(scale from 0 to 4) which characterized by fruit 55–75 mm in diameter. and another with cherry-type fruit. | |
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