The Importance of the Bolivian Wild Potato Species in Breeding for Globodera pallida Resistance |
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| Authors: | M T Jackson J G Hawkes Beatrice S Male-Kayiwa N W M Wanyera |
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| Institution: | M. T. Jackson;, Plant Genetics Group, School of Biological Sciences, University of Birmingham, P.O. Box 363, Birmingham, B15 2TT J. G. H. Wawkes;, c/O Earth Sciences, University of Birmingham (U.K.) B. S. Male;-Kayiwa and N. M. W. Wanyera, Kawanda Research Station, P.O. Box 7C65, Kampala (Uganda) |
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| Abstract: | Screening for resistance to the potato cyst nematode, Globodera pallida, in potatoes from. Bolivia, was carried out in 1983 and 1984, using a mixture of four nematode populations representing pathotypes Pa1, Pa2 and Pa3 From the 66 accessions of 17 species and subspecies evaluated, highly resistant genotypes were identified in 21 accessions from seven species. All had Pf/Pi values of 2 or less, whereas the susceptible control, Solanum tuberosum cv. ‘Disiree’ had Pf/Pi values of more than 2G in both tests. Two diploid wild species, S. brevicaule and S. leptophyes, showed the best resistant. The geographical distributional of resistant populations and the evolution of resistance in wild potato populations are discussed. |
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| Keywords: | Solanum spec Globodera pallida potate cyst nematode potato breeding genetic resources wild species resistance screening evaluation studies phytogeography |
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