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Mapping and marker-assisted selection for a gene for extreme resistance to potato virus Y |
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| Authors: | J H Hämäläinen K N Watanabe J P T Valkonen A Arihara R L Plaisted E Pehu L Miller S A Slack |
| Institution: | (1) Department of Plant Pathology, Cornell University, Ithaca, NY 14853, USA, and Department of Plant Production, P.O. Box 27, FIN-00014 University of Helsinki, Finland, FI;(2) Department of Plant Breeding and Biometry, Cornell University, Ithaca, NY 14853, USA and International Potato Center (CIP), Lima, Peru, US;(3) Institute of Biotechnology, P.O. Box 56, FIN-00014 University of Helsinki, Finland, FI;(4) Department of Plant Breeding and Biometry, Cornell University, Ithaca, NY 14853, USA, US;(5) Department of Plant Breeding and Biometry, Cornell University, Ithaca, NY 14853, USA, US;(6) Department of Plant Production, P.O. Box 27, FIN-00014 University of Helsinki, Finland, FI;(7) Department of Plant Pathology, Cornell University, Ithaca, NY 14853, USA, US |
| Abstract: | The chromosomal location of the major gene Ry adg controlling extreme resistance to potato virus Y (PVY) in Solanum tuberosum subsp. andigena was identified by RFLP analysis of a diploid potato population. A total of 64 tomato and potato RFLP markers were screened with the bulked segregant analysis (BSA) on segregants extremely resistant, hypersensitive or susceptible to PVY. Four markers TG508, GP125, CD17 and CT168 at the proximal end of chromosome XI showed close linkage with extremely resistant phenotypes. TG508 was identified as the closest marker linked with the Ry adg locus with the maximum map distance estimated as 2.0 cM. The 4 markers linked with the Ry adg locus were tested on independent tetraploid and diploid potato clones and were subsequently found useful for marker-assisted selection for plants containing Ry adg . Received: 5 July 1996 / Accepted: 19 July 1996 |
| Keywords: | Potato virus Y Resistance gene Solanum tuberosum subsp andigena Potato RFLP |
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