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Early detection of Verticillium wilt resistance in a potato breeding program

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Abstract

Nine potato clones/cultivars selected for varying degrees of Verticillium wilt (VW) resistance based on degree of vascular colonization, were intercrossed and outcrossed to 13 uncharacterized clones. Based on growth characteristics of 3,535 seedling transplants and an assay quantifyingV. dahliae in potato vascular tissue, 404 clones were selected for further tests. The average number ofVerticillium dahliae colony forming units (CFU) expressed as Log10(CFU + l)/0.1 ml of plant sap for the 404 clones was 2.3, and 1.3 and 3.7 for resistant Reddale and susceptible Kennebec checks, respectively. Thirty-five clones (8.66%) had CFU values equal to or less than Reddale suggesting that VW resistance is a readily transmitted trait.

Compendio

Nueve clones/cvs de papa, seleccionados por sus diversos grados de resistencia a la marchitez porVerticillium (VW) basados en el grado de colonizacion vascular, fueron retrocruzados y entrecruzados (menor parentezco) a 13 clones. Basándose en las características del crecimiento de 3 535 plántulas trasplantadas y en un ensayo cuantificativo deV. dahliae en el tejido vascular de la papa, se seleccionaron 404 clones para pruebas adicionales. El número promedio de unidades formando colonias deVerticillium dahliae (CFU), expresado como Log10(CFU + l)/0.1 cm3 de savia vegetal, para los 404 clones fue 2.3,y 1.3 y 3.7 para los testigos Reddale (resistente) y Kennebec (susceptible), respectivamente. Treinta y cinco clones (8.66%) tuvieron valores de CFU iguales o menores que Reddale sugiriendo que la resistencia a VW es un atributo transmitido rápidamente.

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Authors and Affiliations

  1. Deparment of Plant Pathology, University of Minnesota, 55108, St. Paul, MN

    German P. Hoyos (Former Research Assistant) & Neil A. Anderson (Professor)

  2. Deparment of Horticulture, University of Minnesota, 55108, St. Paul, MN

    Florian I. Lauer (Professor, Department of Horticulture)

  3. Soil and Plant Laboratory de Colombia Inc.; Aerocentro Comercial Dorado Plaza, Avenida el Dorado N∘ 84-A-55; Locales 32/32A-A.A.93183, Bogota, Colombia

    Florian I. Lauer (Professor, Department of Horticulture)

Authors
  1. German P. Hoyos
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  2. Florian I. Lauer
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  3. Neil A. Anderson
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Additional information

Published as contribution No. 19,960 of the Minnesota Agricultural Experiment Station based on research conducted under Project 22-35H, and supported by a grant from the Red River Valley Potato Growers Association.

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Hoyos, G.P., Lauer, F.I. & Anderson, N.A. Early detection of Verticillium wilt resistance in a potato breeding program. American Potato Journal 70, 535–541 (1993). https://doi.org/10.1007/BF02846754

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  • DOI: https://doi.org/10.1007/BF02846754

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