American Potato Journal

, Volume 70, Issue 6, pp 437–452 | Cite as

Sexual progeny of somatic hybrids between potato andSolanum brevidens: Potential for use in breeding programs

  • John P. Helgeson
  • Geraldine T. Haberlach
  • Mark K. Ehlenfeldt
  • Greg Hunt
  • John D. Pohlman
  • Sandra Austin


Hexaploid somatic hybrids have been obtained by fusion of protoplasts fromSolanum brevidens (PI 218228, 2x = 2n = 24) andS. tuberosum (PI 203900 or cv. Russet Burbank; 2x = 4n = 48). In the work reported here, pentaploid progeny derived from sexual crosses between the somatic hybrids and the potato cultivar, Katahdin were assessed for transfer of disease resistances and improvement of agronomic traits. Segregation was noted in disease resistances to race 0 ofPhytophthora infestans and to tuber soft rot caused byErwinia spp., indicating that sexual transfer of traits captured by protoplast fusion had occurred. The pentaploid progeny showed substantial variation in and often improvement of some agronomic traits as compared to the somatic hybrids. The results indicate that interspecific somatic hybridization can produce material with potential for use in a potato breeding program

Additional Key Words

Disease resistance late blight soft rot protoplast 


Se han obtenido híbridos somáticos hexaploides por fusión de protoplastos deSolanum brevidens (PI218228, 2x = 2n = 24)yS. tuberosum (PI203900 o cv Russet Burbank; 2x = 4n = 48). En el trabajo, cuyo informe se presenta aquí, las progenies pentaploides se obtuvieron de cruzamientos sexuales entre los híbridos somáticos y el cultivar de papa Katahdin y se evaluaron para transferencia de resistencias a enfermedades y el mejoramiento de atributos agronómicos. Se notó segregación en las resistencias a enfermedades, a la raza 0 dePhytophthora infestans y a la pudrición suave de los tubérculos causada porErwinia spp., indicando que la transferencia sexual de atributos capturada al usar fusión de protoplastos había ocurrido. En comparación con los híbridos somáticos, la progenie pentaploide mostró una variatión sustancial, y frecuentemente, la mejora de algunos atributos agronómicos. Los resultados indican que la hibridación somática interespecífica puede producir material con potencial para ser utilizado en un programa de mejoramiento de papa.


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Copyright information

© Springer 1993

Authors and Affiliations

  • John P. Helgeson
    • 1
  • Geraldine T. Haberlach
    • 1
  • Mark K. Ehlenfeldt
    • 1
  • Greg Hunt
    • 1
  • John D. Pohlman
    • 1
  • Sandra Austin
    • 1
  1. 1.Agricultural Research Service, U. S. Department of Agriculture, Department of Plant PathologyUniversity of WisconsinMadison

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