American Potato Journal

, Volume 58, Issue 2, pp 93–102 | Cite as

Inheritance of tuber traits from phureja in diploid phureja - Tuberosum hybrids

  • N. A. McHale
  • F. I. Lauer


Heterosis and combining ability for tuber number, average tuber weight, and total yield were evaluated in Phureja - haploid Tuberosum diploid hybrids. Heterosis estimates suggest dominance for high tuber number and low average tuber weight in Phureja. Total yield of the hybrid population exceeded the high parent. The higher-yielding segment of hybrids had a significantly higher number of smaller tubers per plant. Breeding value could be improved by attaining high yield with a lower number of larger tubers per plant. General combining ability was the only significant source of variation for tuber number and average tuber weight indicating high heritability. Phenotypic recurrent selection should be an effective approach to manipulating these traits. General and specific combining ability were significant for total yield. Full exploitation of genetic variance for yield will require test-crossing.

Key Words

Phureja heterosis combining ability haploid germplasm 


Heterosis y habilidad combinatoria se evalúo en híbridos diploides de Phureja-Tuberosum haploides, para número de tubérculos, peso promedio de tubérculo y rendimiento total de tubérculos. Estimados de heterosis sugieren dominancia para alto número de tubérculos lo mismo que para bajo peso promedio de tubérculos en Phureja. Rendimiento total de tubérculo de la población híbrida, superó al progenitor más alto. La porción de híbridos de alto rendimiento tuvo alto número de tubérculos pequeños por planta en forma significativa. Su valor en mejoramiento podría incrementarse obteniendo altos rendimientos con bajo número de tubérculos grandes por planta. Habilidad combinatoria general fué la única fuente de variación significativa para número de tubérculos y peso promedio de tubérculo, indicando alta heredabilidad. Selección recurrente fenotípica sería el mejor método para mejorar estos atributos. Tanto habilidad combinatoria general como específica fueron significativas para rendimiento total. Explotación intensiva de la variancia genética para rendimiento requeriría cruces de prueba.


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Copyright information

© Springer 1981

Authors and Affiliations

  • N. A. McHale
    • 1
  • F. I. Lauer
    • 1
  1. 1.Department of Horticultural Science, Institute of AgricultureUniversity of MinnesotaSt. Paul

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