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Effect of selecting potato seedlings under maritime conditions on the performance of the first clonal generation under Prairie conditions

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Abstract

The Agriculture Canada Potato Breeding Program in New Brunswick is the source of new germplasm for co-operative breeding projects in other regions of Canada. Selection under maritime conditions in early clonal generations is conducted at Fredericton, New Brunswick prior to shipment of seedlings to these projects. An evaluation of this system was required with the advent of a new breeding project at the Lethbridge Research Station, Alberta, in 1979 for the Prairie region of Canada.

Two groups of first field generation seedlings obtained from the Fredericton breeding program were compared in Alberta. One group was composed of seedlings obtained at random and the second of seedlings obtained through the normal selection procedures used at Fredericton. Ten crosses were sampled in 1979 and twelve in 1980.

Results of the study provide evidence that pre-selection in the first clonal generation at Fredericton significantly (P < 0.05) improves the maturity, yield, and tuber traits of these seedlings grown in Alberta, yet does not cause a major reduction in the variability of traits.

Resumen

El Programa de Mejoramiento de Papa de la “Agriculture Canada” en New Brunswick es la fuente de germoplasma nuevo para proyectos cooperativos de mejoramiento en otras regiones de Canadá. En Fredericton, New Brunswick, antes del envío de plántulas para esos proyectos, se han estado seleccionando, bajo condiciones climáticas de cercanía al mar, las generaciones clonales tempranas. Con la creatión de un nuevo proyecto de mejoramiento en la estación de investigaciones de Lethbridge, Alberta, en 1979, destinado a la región de praderas del Canadá, es necesario evaluar ese sistema.

Dos grupos de plántulas de primera generación en el campo, provenientes del programa de mejoramiento de Fredericton, fueron comparados en Alberta. Un grupo estaba compuesto por plántulas obtenidas al azar y el otro por plántulas obtenidas por los procedimientos normales de selección utilizados en Fredericton. Diez muestras de cruzamientos fueron sacadas en 1979 y 12 en 1980.

Los resultados del estudio hacen evidente que la preselección en la primera generación clonal en Fredericton majora significativamente (P 0,05) la madurez, el rendimiento y los atributos de los tubérculos de estas plántulas cultivadas en Alberta pero no causa una reducción importante en la variabilidad de atributos.

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Lynch, D.R., Tai, G.C.C., Young, D.A. et al. Effect of selecting potato seedlings under maritime conditions on the performance of the first clonal generation under Prairie conditions. American Potato Journal 60, 607–615 (1983). https://doi.org/10.1007/BF02854110

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