Abstract
Tuber resistance toPhytophthora infestans was studied in relation to physiological age in tubers of the cultivars Atzimba, Katahdin, Kennebec, and Sebago. Resistance to race1,2,3,4 was evaluated in freshly harvested tubers, and tubers stored at 5 C for up to 215 days. Atzimba tubers were highly resistant when freshly harvested but became increasingly susceptible as they aged physiologically. Tubers of the other three cultivars were susceptible when freshly harvested and also when aged. Further, 57 tuber selections from among 11 crosses initially gave resistant reactions. However, after storage for six months at 5 C, 26.3% of the selections remained resistant, 22.8% were moderately resistant, 31.6% moderately susceptible, and 19.3% fully susceptible.
Resumen
La relacion entre resistencia aPhytophthora infestons y el envejecimiento fisiologico en tuberculos, fue estudiada en los cultivares Atzimba, Katahdin, Kennebec, y Sebago. Resistencia a la raza fisiologica1,2,3,4 fue evaluada en tuberculos cosechados frescos y en tuberculos almacenados a 5 C durante 215 dias. Tuberculos del cultivar Atzimba fueron altamente resistentes cuando se evalvaron frescos pero se hicieron mas susceptible segun fueron envejeciendo fisiologicamente. Tuberculos de los otros tres cultivares fueron susceptibles cuando se evaluaron frescos asi como despues de envejecer. Adicionalmente, 57 selecciones de tubersulos procedentes de 11 cruzes presentaron una reaccion resistente inicialmente. Sin embargo, despues de almacenados por 6 meses a 5 C, 26.3% de las selecciones permanecieron resistentes, 22.8% moderadamente resistentes, 31.6% moderadamente susceptible, y 19.3% Completamente susceptible.
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Published with the approval of the Director of the West Virginia Agricultural and Forestry Experiment Station as Scientific Article No. 1889.
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Bhatia, S.K., Young, R.J. Reaction of potato tuber slices toPhytophthora infestans in relation to physiological age. American Potato Journal 62, 471–478 (1985). https://doi.org/10.1007/BF02854520
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DOI: https://doi.org/10.1007/BF02854520