Physical and physiological traits of tubers and their starch-granule sizes of local potato cultivars in Bangladesh

T. Nishizawa, T.S. Roy, K. Nara, M.M. Rahman, R. Chakraborty, X. Li, Y. Motomura
This study was conducted to clarify the physical and physiological traits of tubers and their starch-granule sizes of local potato cultivars in Bangladesh. Five local potato cultivars: ‘Fata Pakri’, ‘Jam Alu’, ‘Romana’, ‘Tel Pakri’, and ‘Diamant’ and two popular commercial cultivars: ‘Irish Cobbler’ and ‘May Queen’, were tested. The shape of tubers ‘Fata Pakri’, ‘Romana’, ‘Tel Pakri’, and ‘Irish Cobbler’ was round, while that of ‘Jam Alu’, ‘Diamant’, and ‘May Queen’ oval. The weight and volume of the smallest-tuber cultivar, ‘Jam Alu’, were lower than half of the largest-tuber cultivar, ‘May Queen’. Local potato cultivars were characterized by significantly high water and soluble solid contents while lower specific gravity and starch content were compared with popular commercial cultivars. However, the amylose ratio did not differ significantly among cultivars. The reducing sugar content, starch granule volumes, and frequency histograms of starch granules were specified by cultivars. Physical traits of the potato tubers were often significantly correlated with the physiological traits of the tubers. At the same time, there was no significant correlation between the starch-granule sizes and physiological traits of the tubers, except for a significance between the starch length:width vs. starch content.
Nishizawa, T., Roy, T.S., Nara, K., Rahman, M.M., Chakraborty, R., Li, X. and Motomura, Y. (2021). Physical and physiological traits of tubers and their starch-granule sizes of local potato cultivars in Bangladesh. Acta Hortic. 1326, 239-246
DOI: 10.17660/ActaHortic.2021.1326.32
https://doi.org/10.17660/ActaHortic.2021.1326.32
amylase, potato, reducing sugar, starch-granule size, sucrose
English

Acta Horticulturae