Abstract
Heat therapy and meristem tip propagation were used to develop two or three virus-free clones of 10 cultivars from the following sources: Epicure from British Columbia and Scotland; Katahdin, Kennebec, Keswick, Red Pontiac and Sebago from British Columbia and New Brunswick; Norchip from Alberta, Quebec and Washington; Norland from Alberta, British Columbia and North Dakota; Red La Soda from British Columbia, Nebraska and North Dakota; and White Rose from British Columbia and North Dakota. Tests prior to treatment showed that all but one of the stocks were infected with potato virus X and/or potato virus S but in only five of the ten cultivars were all clones infected with the same virus or viruses. Field trials with the virus-free clones, which extended over four years, showed that one of the Norchip clones produced fewer tubers per plant than two other clones in three years of the four years, but no consistent differences in yield or specific gravity of tubers were found among the clones of any of the 10 cultivars.
Resumen
Terapia con calor y propagación por cultivo meritemático apical fueron utilizados para desarrollar dos o tres clones libres de virus de 10 cultivares de papa provenientes de las siguietes fuentes: Epicure de British Columbia (Canada) y Escocia; Katahdin, Kennebec, Keswick, Red Pontiac y Sebago de British Columbia y New Brunswick (Canada); Norchip de Alberta y Quebec en Canada y el Estado de Washington, EE.UU. de N.A.; Norland de Alberta, British Columbia y el Estado de Dakota del Norte, EE.UU.; Red La Soda de British Columbia, Dakota del Norte y Nebraska (EE.UU.); y White Rose de British Columbia y Dakota del Norte. Previo al tratamiento se demostró mediante pruebas que todas, excepto una de las fuentes, estaban infectadas con PVX y/o PVS, pero en sólo cinco de los diez cultivares estuvieron infectados todos los clones con el o los mismos virus.
Ensayos de campo con los clones libres de virus, que se realizaron durante cuatro años, demostraron que uno de los clones del cultivar Norchip produjo menos tubérculos por planta que otros dos clones en très de los cuatro años, pero no hubo diferencias consistantes en rendimiento y gravedad específica de tubérculos entre los clones de cualquiera de los 10 cultivares.
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Literature Cited
Wright, N.S. and Frances C. Mellor. 1976. A comparison of five clones of virus-free Netted Gem potato from British Columbia and Idaho. Am Potato J 53:99–103.
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Wright, N.S. Uniformity among virus-free clones of ten potato cultivars. American Potato Journal 60, 381–388 (1983). https://doi.org/10.1007/BF02877243
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DOI: https://doi.org/10.1007/BF02877243