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Controlled testing and breeding for field resistance to potato virus Y

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Summary

Controlled testing for field resistance to virus Y (placement of viruliferous aphids on plants) was more efficient in insect-proof cages (12×20×6 foot cage covered with 32 gauge Seran) than in the field or greenhouse. Subsequent indexing of the caged clones in the greenhouse gave a good indication of the potential resistance of the clone grown under field conditions.

Virus Y resistance may be incorporated into new clonal lines. Inbreeding of the parental clones leads to sterility. A modified system of backcrossing proved most adequate for maintaining fertility at a usable level. Outcrosses with selfed progeny of virus Y stocks, crosses of parental hybrids (Y stocks crossed with a commercial variety or selection), and crosses between parental hybrids gave the highest ratios of symptomless plants.

Resumen

Las pruebas dirigidas referente a la resistencia del campo contra el virus Y (colocacion de afides portadores de virus sobre plantas) resultaron mas eficiente en jaulas aprueba de insectos (jaulas de 12×20×6 pies cubienta con Seran de 322 gauge) que en el campo o invernadero. Al hacer ulteriormente un indice de los clones enjaulados invernadero se obtuvo una buena incidencia de la resistencia potencial del clone crecido bajo en condiciones del campo.

La resistencia al virus Y puede hacer incorporacda a nuevas serias de clones.

La cruza de los clones emparintados entre si conduce a esterilidad un sistema modificado de cruza entre ascendente con descente demostro mas lo adequado para mantener la fertilidad a un nivel aprovechable. Cruzas con la propia progenie de cepa del virus Y; cruzas de hibridos emparentados (cepas de Y cruzado de una variedad o seleccion comercial) y cruzas entre hibridos emparentados dieron las mas altas coeficientes de plantas libres de sintomas.

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Authors and Affiliations

  1. North Dakota State University, Fargo, North Dakota

    E. P. Lana (Professor of Horticulture) & A. P. Benson (Professor of Plant Pathology)

Authors
  1. E. P. Lana
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  2. A. P. Benson
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Additional information

Submitted with the approval of the Director of the North Dakota Agricultural Experiment Station as Journal Article 102.

Dr. W. G. Hoyman, Plant Pathologist, U.S.D.A. was associated with the work presented in this paper in 1956–1957.

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Lana, E.P., Benson, A.P. Controlled testing and breeding for field resistance to potato virus Y. American Potato Journal 44, 128–136 (1967). https://doi.org/10.1007/BF02862911

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  • DOI: https://doi.org/10.1007/BF02862911

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