caa a22 4500 469042370 CHVBK 20180323132815.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF01974467 doi (NATIONALLICENCE)springer-10.1007/BF01974467 Foxe M. National Agricultural and Veterinary Biotechnology Centre, University College Dublin, Belfield, Dublin 4, Ireland aut Breeding for viral resistance: conventional methods [Elektronische Daten] [M. Foxe] Conventional breeding methods based primarily on the principles of Mendelian genetics have provided the basis for the majority of resistance to viruses in potato cultivars. This development of resistant cultivars has resulted from sexual hybridisation followed by selection of the best genetic recombinant. Selection is one of the most powerful tools available for crop improvement. Successful selection depends on reproducible genetic variability, ability to identify genetically superior individual plants or families, populations large enough to ensure the likely occurrence of rare genetic combinations, and the combination of resistance expression with commercial utility. Resistance to the major potato viruses namely potato virus A, potato virus M, potato virus S, potato virus X, potato virus Y and potato leafroll virus has been studied and selected for. A number of different types of resistance have been identified including (a) major gene resistance; (b) minor gene resistance; and (c) immunity. With the exception of potato leafroll virus, stable resistance to the other viruses has been achieved either singly or in combination in a range of potato cultivars. In addition for both potato leafroll virus and potato virus Y, the focus has been on the development of resistance to aphid transmission of the viruses. Koninklijke Nederlandse Planteziektenkundige Vereniging, 1992 potexvirus nationallicence potyvirus nationallicence PVA nationallicence PVM nationallicence PVS nationallicence PVX nationallicence PVY nationallicence PLRV nationallicence major gene resistance nationallicence minor gene resistance nationallicence potato cultivars nationallicence aphid transmission nationallicence Netherlands Journal of Plant Pathology Kluwer Academic Publishers 98(1992-03-01), 13-20 0028-2944 98<13 1992 98 10658 https://doi.org/10.1007/BF01974467 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01974467 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Foxe M. National Agricultural and Veterinary Biotechnology Centre, University College Dublin, Belfield, Dublin 4, Ireland aut NATIONALLICENCE 773 0- Netherlands Journal of Plant Pathology Kluwer Academic Publishers 98(1992-03-01), 13-20 0028-2944 98<13 1992 98 10658 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer