Abstract
Potato seeds of 24 families consisting primarily ofSolanum tuberosum ssp.andigena with someS. vernei germplasm that were segregating for resistance to potato cyst nematodes (Globodera pallida races P4A and P5A andG. rostochiensis race R1A) were obtained from the International Potato Center. These seeds produced 468 clones with sufficient tubers for evaluation for resistance toG. pallida races P4A and P5A in pot tests at the International Potato Center. Twenty-six of these clones, selected for a high degree of resistance toG. pallida races P4A and P5A, were crossed with neotuberosum ×Solanum tuberosurn hybrids that had been selected for resistance toG. rostochiensis race R1A (golden nematode) and the viruses PVX and PVY. The resultant progenies possessed a high degree of resistance to all three races of the potato cyst nematode. From these progenies, 23 clones were selected for resistance to the three races (G. pallida P4A and P5A,G. rostochiensis R1A) of potato cyst nematodes. The better adapted clones with resistance to the 3 races of potato cyst nematodes will be used in the next cycle of back-crossing.
Compendio
Se obtuvo del Centro Internacional de la Papa semillas de papa de 24 familias consistentes principalmente deSolanum tuberosum ssp.andigena con Algún germoplasma deS. vernei que segregaban para resistencia al nematodo del quiste de la papa (Globodera pallida, razas P4Ay P5Ay G. rostochiensis, raza R1A). Estas semillas produjeron 468 clones con suficientes tubérculos para la evaluación de resistencia aG. pallida, razas P4Ay P5A en pruebas en macetas en el Centro Internacional de la Papa. Veintiseis de estos clones, seleccionados por un alto grado de resistencia aG. pallida, razas P4Ay P5A fueron cruzados con neotuberosum x híbridosSolarium tuberosum que habían sido seleccionados para resistencia aG. rostochiensis, raza R1A (nematodo dorado) y a los virus PVX y PVY. Las progenies resultantes tuvieron un alto grado de resistencia a las trez razas del nematodo del quiste de la papa. De estas progenies, veintitrés clones fueron seleccionados para resistencia a las tres razas (G. pallida P4Ay P5A,G. rostochiensis R1A) del nematodo del quiste de la papa. Los clones mejor adaptados, con resistencia a las tres razas de nematodos del quiste de la papa, serán utilizados en el próximo ciclo de retrocruzamiento.
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Cooperative investigations of U.S. Department of Agriculture, Agricultural Research Service, Cornell University and The International Potato Center.
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Brodie, B.B., Plaisted, R.L. & de Scurrah, M.M. The incorporation of resistance toGlobodera Pallida intoSolanum Tuberosum germplasm adapted to North America 1. American Potato Journal 68, 1–12 (1991). https://doi.org/10.1007/BF02893336
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DOI: https://doi.org/10.1007/BF02893336