The importance of wild potato species resistant to the potato cyst nematode,Globodera pallida,pathotypes P4A and P5A,in potato breeding. I. Resistance studies |
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| Authors: | R. Chavez M. T. Jackson P. E. Schmiediche J. Franco |
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| Affiliation: | (1) Department of Plant Biology, University of Birmingham, U.K.;(2) International Potato Center (CIP), Lima, Peru;(3) Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia |
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| Abstract: | Summary Seven wild diploid potato species, Series Tuberosa, representing 1023 clones were screened for resistance to the potato cyst nematode, Globodera pallida. Over 25% of the clones were resistant to pathotype P4A and almost 30% were resistant to pathotype P5A. The resistance in hybrid progenies of these and other resistant species with cultivated potatoes was evaluated, and over 2200 seedlings were screened. High frequencies of resistance (>50%) to P4A were found in progenies with Solanum leptophyes, S. vernei, S. gourlayi and S. capsicibaccatum, whereas resistance to P5A was found in these species as well as S. sparsipilum. The importance of nematode resistant wild species for potato breeding is discussed. |
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| Keywords: | Wild potato species (Solanum spp.) Globodera pallida resistance potato cyst nematode intra- and interspecific hybrids inheritance of resistance |
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