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Characterization of a new gibberellin related dwarfing locus in potato (Solanum tuberosum L.)

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Abstract

Gibberellins have been shown to be involved in such important processes as seed germination, flowering, maturation and tuberization in potato. Parents fromSolanum tuberosum Groups Andigena and Tuberosum were found to produce progeny containing dark green, rosette dwarf individuals which could be completely restored to normal appearance by exogenous GA3. Test crosses indicated that this phenomenon can be explained by the action of a single locus, the dwarfing characteristic being conferred by the nulliplex condition. The gene symbol “ga1” is proposed. Group Andigena dwarfs demonstrated much greater tuberization compared to their normal full sibs or dwarfs restored to normal phenotype by exogenous GA3. The possibility that such gibberellin mutants may be involved in the long day adaptation of Gp. Tuberosum is discussed. This character may also be a useful tool for investigating various aspects of the gibberellin status of the potato.

Compendio

Se ha demostrado que las giberelinas están involucradas en tan importantes procesos como la germinación de la semilla, la floración, la maduración y la tuberización en papa. Se encontró que los padres deSolanum tuberosum, Grupos Andígena y Tuberosum, producían progenie conteniendo individuos verdes oscuros, con enanismo en roseta, que recuperaron completamente su apariencia normal mediante GA3 exógeno. Los cruzamientos de la prueba indicaron que este fenómeno puede explicarse por la acción de un únicolocus, siendo la característica del enanismo conferida por la condición nulliplex. Se propone como símbolo del gen “ga1” Las plantas enanas del Grupo Andígena mostraron una mayor tuberización en comparacioón con sus individuos normales o las plantas enanas restauradas al fenotipo normal mediante el GA3 exógeno. Se discute la posibilidad que tales mutantes de la giberelina puedan estar involucrados en la adaptación del Gp. Tuberosum a días largos. Este carácter puede ser un instrumento útil para investigar varios aspectos de la condición de las giberelinas de la papa.

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Authors and Affiliations

  1. Geneticist, Vegetable Crop Unit, Agricultural Research Service, USDA, Inter-Regional Potato Introduction Station, 54235, Sturgeon Bay, WI, USA

    R. E. Hanneman

  2. Research Geneticist,Vegetable Crop Unit, Agricultural Research Service, USDA, Department of Horticulture, University of Wisconsin, 53706, Madison, WI, USA

    R. E. Hanneman

Authors
  1. J. B. Bamberg
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  2. R. E. Hanneman
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Additional information

Cooperative investigation of the U.S. Department of Agriculture, Agricultural Research Service and the Wisconsin Experiment Station. Supported in part by the USDA, Cooperative States Research Service Competitive Grant No. 83-CRCR-1-1253.

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Bamberg, J.B., Hanneman, R.E. Characterization of a new gibberellin related dwarfing locus in potato (Solanum tuberosum L.). American Potato Journal 68, 45–52 (1991). https://doi.org/10.1007/BF02893340

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  • DOI: https://doi.org/10.1007/BF02893340

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