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Red Pearl: A new gourmet red potato variety

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Abstract

Red Pearl is a medium-late variety with round tubers of stable dark red skin and white flesh. It is an ideal gourmet and canning variety due to its high tuber set and high proportion of tubers less than 4.76 cm diameter (up to 71% of the total yield). Red Pearl has good boiling and baking qualities. Its specific gravity is slightly higher and the tuber dormancy is longer than Dark Red Norland. Red Pearl yields only 54% to 77% of Red Norland because of its small tuber size. Red Pearl is less susceptible to common scab (Streptomyces scabiae < than Dark Red Norland, significantly more resistant to corky ring spot (tobacco rattle virus) than Dark Red Norland and is resistant to bacterial wilt and brown rot (Ralstonia solanacearum). Red Pearl showed similar susceptibilities to several other diseases, including early blight, late blight, pink rot, and tuber soft rot, compared to Dark Red Norland. Red Pearl is more susceptible to shatter bruise and blackspot than Dark Red Norland when handled from storage at 7.2 C.

Resumen

Red Pearl es una variedad de papa de maduración mediana a tardía, con tubérculos de piel roja estable y pulpa blanca. Es una variedad de sabor delicado, ideal para enlatado debido a su alta tuberización y gran proporción de tubérculos menores de 4.76 cm de diámetro (tamaño del 71% del rendimiento total). Red Pearl tiene buenas cualidades de cocción y horneado. Su gravedad específica es ligeramente mas alta y el periodo de latencia del tubérculo es mayor que el de Dark Red Norland. El rendimiento de Red Pearl es de sólo un 54% a 77% que el de Red Norland debido a que sus tubéculos son más pequeños. Red Pearl es menos susceptible a la sarna común (Streptomyces scabiae) y significativamente mas resistente al anillo corchoso (Tobacco Rattle Virus) que Dark Red Norland. Es resistente a la marchitez bacteriana y a la pudrición morena (Ralstonia solanacearum). Red Pearl ha mostrado la misma susceptibilidad de Dark Red Norland a muchas otras otras enfermedades, incluyendo tizón temprano, tizón tardío, pudrición rosada y pudrición blanda del tubérculo. Red Pearl es más susceptible que Dark Red Norland a las magulladuras y a la mancha negra que se producen cuando los tubérculos son extraídos del almacén a 7.2 C.

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Correspondence to J. Jiang.

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Groza, H.I., Bowen, B.D., Kichefski, D. et al. Red Pearl: A new gourmet red potato variety. Am. J. Pot Res 81, 209–213 (2004). https://doi.org/10.1007/BF02871751

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