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Estimation of genetic parameters for characters related to potato propagation by true seed (TPS) in an andigena population

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Abstract

Genetic variances were estimated for a population ofSolarium tuberosum L. subsp.andigena, selected for adaptation to north temperate climatic conditions. Estimates for 15 traits, including some unique to true seed (TPS) propagation, were obtained from trials conducted under short day conditions in Peru. Only non-additive variance was found for yield, but heritability estimates were relatively high for tuber number and tuber size. The results indicated that yield could be increased through selection utilizing additive variance for the component traits, especially tuber size. Estimates of genetic variability for tuber uniformity were low. TPS yield was positively correlated with most other traits except tuber number.

Resumen

Fueron estimadas las variancias genéticas para una población deSolatium tuberosum L., subespecieandigena, seleccionada para adaptatión a condiciones climáticas templadas del hemisferio norte. Utilizando datos de ensayos efectuados en el Perú en condiciones de días cortos, se obtuvieron valores estimados para 15 atributos, incluyendo algunos propios de la propagatión por semilla botánica. Para rendimiento se obtuvo sólo variancia no aditiva pero los valores estimados de heredabilidad fueron relativamente altos para número y tamaño de les tubérculos. Los resultados indicaron que el rendimiento podía ser incrementado mediante selección al utilizar variancia aditiva para los atributos, especialmente para el tamano del tuérculo. Los valores estimados de variabilidad genética para uniformidad del tubérculo fueron bajos. El rendimiento de la semilla botánica presentó correlación positiva con la mayoría de los otros atributos, pero no en el número de tubérculos.

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Thompson, P.G., Mendoza, H.A. & Plaisted, R.L. Estimation of genetic parameters for characters related to potato propagation by true seed (TPS) in an andigena population. American Potato Journal 60, 393–401 (1983). https://doi.org/10.1007/BF02877245

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  • DOI: https://doi.org/10.1007/BF02877245

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