American Potato Journal

, Volume 67, Issue 7, pp 393–404 | Cite as

The identification and evaluation of hybrid plants among open pollinated true seed families

  • Gisela C. Arndt
  • S. J. Peloquin
Article

Abstract

An increase in the proportion ofhybrid vs. selfed plants improves the performance ofopen pollinated (OP) true potato seed (TPS) families. Strategies to increase the proportion ofhybrid seeds were investigated. A marker gene for yellow tuber flesh in a diploid clone, interplanted as the male parent, permitted identification of 4x × 2x hybrids among the OP progeny. Only 5% of the OP progeny were 4x × 2x hybrids. The proportion of 4x × 2x hybrid plants among the OP progeny was increased when the female parent had low male fertility and when only the largest 25% of the seeds were planted. The hybrid 4x × 2x plants were superior for all traits evaluated on the OP seedling transplant families. Traits included vigor, flowering, pollen stainability, OP fruit set, and tuber yield. Effects of the female parent were significant only for vigor and flowering, while seed size did not affect values for any trait consistently: With the limited outcrossing observed, the low seed set obtained when using parents with low male fertility and the work involved in selecting the largest seeds within individual fruits were not justifiable. However, research with OP true seed families asa low cost planting material should be continued, since high yielding OP families have been identified.

Key Words

True potato seed male fertility seed size outcrossing tuber yield 

Compendio

Un incremento en la proporción de híbridos vs. plantas autofecundadas mejora el comportamiento de las familias de semilla (sexual) de polinización libre (PL). Se investigaron las estrategias para incrementar la proporción de semilla híbrida Un gene marcador para carne amarilla de tubérculo en un clon diploide, intercalado en la siembra como progenitor masculino, permitión identificar híbrida 4x × 2x entre la progenie de PL. Solamente el 5% de la progenie de PL fueron híbrida 4x × 2x. La proporción de plantas híbrida entre la progenie de PL fue incrementada cuando el progenitor femenino teníbrida fertilidad masculina baja y són cuando se sembraron las más grandes del 25% de las semillas. Las plantas híbrida 4x x 2x fueron superiores para todas las caracteríbrida evaluadas sobre las plás de las familias de PL trasplantadas. Las caracteísticas incluyeron vigor, floración tinción del polen, formación de frutos de PL, y rendimiento en tubérculo Los efectos del progenitor femenino fueron significativos sólo para vigor y floración mientras que el tamaísticas de la semilla no afectón consistentemente los valores de ninguna de las caracteríbrida Con el limitado cruzamiento entre individuos poco relacionados, la baja producción de semilla quese obtuvo cuando se usaron progenitores con baja fertilidad masculina y el trabajo que debe realizarse en la selección de las semillas más grandes dentro de los frutos individuales, el procedimiento no se justifica. Sin embargo, deberás continuarse la investigación con familias de semilla (sexual) de PL como material de siembra de bajo costo desde que han sido identificadas familias de PL de alto rendimiento.

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Copyright information

© Springer 1990

Authors and Affiliations

  • Gisela C. Arndt
    • 2
  • S. J. Peloquin
    • 1
  1. 1.Departments of Horticulture and GeneticsUniversity of WisconsinMadison
  2. 2.Department ofAgronomy and Range ScienceUniversity of CaliforniaDavis

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