ISHS Acta Horticulturae 619: XXVI International Horticultural Congress: Potatoes, Healthy Food for Humanity: International Developments in Breeding, Production, Protection and Utilization
MULTIPLE RESISTANCE TO DISEASES IN A POPULATION OF LONG-DAY ADAPTED ANDIGENA POTATOES |
| Authors: | T.R. Tarn, A.M. Murphy, D.H. Wilson, V.J. Burns, K.G. Proudfoot |
| Keywords: | Solanum tuberosum, mass selection, common scab, late blight, PVY, wart |
| Abstract:
A long-day adapted population of the Andean tetraploid primitive cultivated potato Solanum tuberosum Group Andigena was used in a recurrent mass selection program to select for combined resistances to late blight, common scab, PVY, and wart. In each cycle the population was screened for resistance to all four diseases. Clones were selected first on the basis of high disease resistances and then on their agronomic characteristics. Five cycles of selection were completed over 26 years and resulted in increased frequencies of resistance to late blight, common scab, and PVY, and the maintenance of a high frequency of resistance to wart. The frequency of combined resistance to all four diseases increased from zero to 23%. Superior disease resistant selections were crossed with typical cultivar development parents and produced progeny from which agronomically acceptable disease resistant clones were selected. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
