PARTICIPATORY CULTIVAR EVALUATION, SELECTION, AND RELEASE OF LATE BLIGHT RESISTANT TOMATO CULTIVARS IN TANZANIA

C.O. Ojiewo, I.S. Swai, M.O. Oluoch, D. Silué, R. Nono-Womdim, P. Hanson, L. Black, T.C. Wang
Late blight caused by Phytophthora infestans (Mont.) de Bary is the most damaging foliar and fruit disease of tomato in cool, wet environments, causing major yield reductions in the tropical highlands. To provide a greater choice of tomato cultivars to farmers and to bridge the gap between cultivar release and adoption, AVRDC - The World Vegetable Center, Regional Center for Africa conducted a participatory cultivar evaluation and selection with three farmers each in eight locations in Tanzania representing four agro-ecological zones. On-farm trials were conducted in 2004 and 2005 to compare the yield potential and other horticultural traits of four F10 late blight resistant tomato lines (‘LBR19-2’, ‘LBR19-3’, ‘LBR44-2’ and ‘LBR50-2’) and one susceptible check (‘Tengeru 97’) during the rainy season with and without fungicide sprays. The four lines yielded significantly higher than ‘Tengeru 97’. Yield increases ranged from 1.2-100% higher than the check, depending on the severity of late blight disease. Lines ‘LBR19-2’ and ‘LBR44-2’ performed well in all four agro-ecological zones and were the most preferred by farmers due to positive attributes such as fruit firmness, fruit shape, transportability, marketability, and tolerance to diseases. ‘LBR19-2’ was released in 2007 under the cultivar name ‘Meru’. ‘LBR 44-2’ was released in 2008 as ‘Kiboko.’
Ojiewo, C.O., Swai, I.S., Oluoch, M.O., Silué, D., Nono-Womdim, R., Hanson, P., Black, L. and Wang, T.C. (2011). PARTICIPATORY CULTIVAR EVALUATION, SELECTION, AND RELEASE OF LATE BLIGHT RESISTANT TOMATO CULTIVARS IN TANZANIA. Acta Hortic. 911, 199-206
DOI: 10.17660/ActaHortic.2011.911.19
https://doi.org/10.17660/ActaHortic.2011.911.19
Phytophthora infestans, host plant resistance, Solanum lycopersicum
English

Acta Horticulturae