Abstract
Extreme resistance in cultivated potato (Solanum tuberosum) to potato viruses Y and A (PVY and PVA) conditioned by the presence of Ry genes introduced from Solanum stoloniferum was described by Cockerham (1970). Cockerham detailed a number of genes which controlled a variety of reactions, including extreme resistance to both viruses (i.e. little or no visible reaction of plants and no viral replication following graft and manual inoculation) controlled by gene Ry sto. In the present study, cvs ‘Pirola’ and ‘Barbara’, which contain a Ry gene, were found to have extreme resistance to PVY isolates from the ordinary (PVY°), veinal necrosis (PVYN) and potato tuber necrotic ringspot (PVYNTN) subgroups, and PVA. The inheritance of this phenotype was examined in seedling progenies obtained by crossing ‘Barbara’ and ‘Pirola’ with susceptible cultivars. Segregation data for resistance to PVY and PVA in a progeny involving cv ‘Pirola’ best fitted a genetical model of one gene controlling extreme resistance to both PVY and PVA, although the possibility that there are two genes, each controlling resistance to one virus but closely linked, cannot be excluded. Segregation data from progenies involving cv ‘Barbara’ best fitted a genetical model in which there are two independent genes, one controlling extreme resistance to PVA and PVY and a second gene controlling extreme resistance to PVA but not to PVY. This previously unrecognised gene conferring extreme resistance to PVA only, should be given the notation Ra in keeping with nomenclature used for other resistance genes.
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Barker H (1994) Incidence of potato virus Y infection in seed and ware tubers of the potato cv ‘Record’. Ann Appl Biol 124:179–183
Barker H, Harrison BD (1984) Expression of genes for resistance to potato virus Y in potato plants and protoplasts. Ann Appl Biol 105:539–545
Barker H, Webster KD, Reavy B (1993) Detection of potato virus Yin potato tubers:a comparison of polymerase chain reaction and enzyme linked immunosorbent assay. Potato Res 36:13–20
Cockerham G (1943) Potato breeding for virus resistance. Ann Appl Biol 30:105–108
Cockerham G (1970) Genetical studies on resistance to potato viruses X and Y. Heredity 254:309–348
Delhey R (1975) Zur Natur der extremen Virusresistenz bei der Kartoffel. II Das Y-Virus. Phytopath Z 82:163–168
Hawkes JG (1945) The indigenous American potatoes and their value in plant breeding. Emp Agric 13:11–40
Jones RAC (1990) Strain group specific and virus specific hypersensitive reactions to infection with potyviruses in potato cultivars. Ann Appl Biol 117:93–105
Le Romancer M, Kerlan C (1992) Potato tuber necrotic ringspot disease:a genetical approach of the phenomenon and studies about hypersensitive or extreme susceptible behaviour of several cultivars. In: Ritter E, Perez de San Roman (eds) Gobierno Vasco. Proc. Virol Sect Meet Eur Assoc Potato Res. Vitoria-Gasteiz, Spain, pp. 91–95
Ross H (1960) Über die Vererbung von Eigenschaften für Resistenz gegen das Y- und A-Virus in Solanum stoloniferum und die mögliche Bedeutung für eine allgemeine Genetik der Virusresistenz in Solanum sect. Tuberarium. In: Brandes J, Bartels R, Völk J, Wetter C (eds) Veenman & Zonen. Proc 4th Conf Pot Virus Dis., Braunchweig, pp 40–49
Ross H (1986) Potato breeding-problems and perspectives.In:Horn W, Röbbelen G (eds) Advances in plant breeding, no. 13. Paul Parey, Berlin Hamburg, p 132
Ross H, Baerecke ML (1950) Selection for resistance to mosaic virus (diseases) in wild species and in hybrids of wild species of potatoes. Am Potato J 27:275–284
Singh S, Barker H (1991) Comparison of penicillinase-based and alkaline phosphatase-based enzyme-linked immunosorbent assay for the detection of six potato viruses. Potato Res 34:451–457
Valkonen JPT (1994) Natural genes and mechanisms for resistance to viruses in cultivated and wild potato species (Solanum spp.). Plant Breed 112:1–16
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Barker, H. Inheritance of resistance to potato viruses Y and A in progeny obtained from potato cultivars containing gene Ry:evidence for a new gene for extreme resistance to PVA. Theoret. Appl. Genetics 93, 710–716 (1996). https://doi.org/10.1007/BF00224066
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DOI: https://doi.org/10.1007/BF00224066