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Growth of early potatoes from different portions of seed tubers II. Yield

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Abstract

Several of the recently released early-potato (Solanum tuberosum L.) cultivars used in Ontario have produced uneven stands which have been shown to be a result of delayed emergence from basal end seed pieces. A study was conducted to evaluate the effects of seed portions on the yield of three early potato cultivars, Jemseg, Superior and Yukon Gold. Yield of plants from basal seed pieces was lower than that from apical seed pieces or whole tubers for Jemseg and Yukon Gold during several sequential harvests. With Superior, cut seed portions yielded less than whole seed. Number of stems per plant was lower for basal plants of Jemseg. Tubers with strong apical dominance or dormancy such as Jemseg and Yukon Gold are prone to differences in yield among seed portions.

Compendio

Varios de los cultivares precoces de papa recientemente liberados en Ontario han producido establecimientos desiguales que han mostrado ser el resultado de una emergencia retardada de la porción extrema basal del tubérculo-semilla. Se condujo un estudio para evaluar los efectos de las porciones del tubérculo-semilla sobre el rendimiento de tres cultivares precoces de papa, Jemseg, Superior y Yukon Gold. Durante varias cosechas secuenciales el rendimiento de las plantas procedentes de porciones básales de tubérculo-semilla fue menor que el de las plantas procedentes de porciones apicales, o que el de tubérculos-semillas enteros, para Jemseg y Yukon Gold. Con Superior, las porciones de tubérculo-semilla rindieron menos que el tubérculo-semilla entero. El número de tallos por planta fue menor en las plantas básales de Jemseg. Los tubérculos-semillas con dominancia apical o reposo muy pronunciados, como en el caso de Jemseg y Yukon Gold, son propensos a diferencias de rendimiento entre las porciones de tubérculosemilla.

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McKeown, A.W. Growth of early potatoes from different portions of seed tubers II. Yield. American Potato Journal 67, 761–768 (1990). https://doi.org/10.1007/BF03044527

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