Abstract
Several of the recently released early potato cultivars in Ontario are prone to poor and/or uneven stands. Studies were undertaken to investigate these problems. Basal seed halves of Jemseg and Yukon Gold were found to emerge an average of 4.6 and 5.7 days, respectively, later than shoots from apical halves or whole tubers in 3 years of study. No practical difference in emergence was found among tuber portions of Superior. Sums of squares attributed to seed portions accounted for 51.1 percent of the variation of days to 50 percent emergence for Jemseg, 50.3% for Yukon Gold and 8 percent for Superior. No difference in final percent emergence was found among the various seed portions of Jemseg and Superior. Cultivars with strong apical dominance or dormancy appear prone to uneven emergence.
Compendio
Varios de los cultivares precoces de papa recientemente liberados en Ontario son propensos a un establecimiento pobre y desigual. Se llevaron a cabo estudios para investigar estos problemas. Se encontró que las mitades básales de tubérculos-semillas de los cultivares Jemseg y Yukon Gold emergían en promedio a los 4,6 y 5,7 días, respectivamente, más tarde que los brotes de las mitades apicales o tubérculos-semillas enteros durante tres años. No se encontró ninguna diferencia entre las porciones de tubérculo del cultivar Superior. Las porciones de tubérculo-semilla representaron aproximadamente 55% de las sumas de cuadrados, para días a 50% de emergencia para Jemseg y Yukon Gold y 8% para Superior. No se encontró ninguna diferencia en el porcentaje final de emergencia entre las diversas porciones de tubérculo-semilla de Jemseg y Superior. Los cultivares con una fuerte dominancia apical o reposo parecen propensos a una emergencia desigual.
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McKeown, A.W. Growth of early potatoes from different portions of seed tubers I. Emergence and plant stand. American Potato Journal 67, 751–759 (1990). https://doi.org/10.1007/BF03044526
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DOI: https://doi.org/10.1007/BF03044526