Incomplete loss of astringency in pollination-constant non-astringent (PCNA) offspring derived from Japanese and Chinese PCNA persimmon
The complete natural loss of astringency is important for commercial non-astringent persimmon production. Generally, Japanese PCNA (JPCNA) cultivars produce fruit with a small degree of astringency at maturity when grown in a cool region; therefore, they are commercially produced in warm regions. Genetic differences exist for the natural loss of astringency among JPCNA cultivars. 'Fuyu' is commercially produced over wide areas in Japan because of the ease of the loss of natural astringency, contributing to the high eating quality and productivity. In this study, six JPCNA × JPCNA crosses and four JPCNA × (JPCNA × non-PCNA) crosses yielded 66% of JPCNA offspring with a complete loss of astringency in the sensory test. In contrast, six Chinese PCNA (CPCNA) × non-PCNA crosses yielded only 35% of CPCNA offspring with a complete loss of astringency. The average score of the degree of astringency was lower in JPCNA offspring (0.51) than in CPCNA offspring (1.21). Fruit ripening times in CPCNA offspring were generally late, whereas those of JPCNA offspring varied depending on the cross. The differences observed between JPCNA and CPCNA offspring may be due to 1) genetic properties inherent to JPCNA and CPCNA, 2) the genetic ability of cross-parents used in this study, and 3) the fruit ripening time of CPCNA offspring being too late at Akitsu in Japan because the degree of astringency in the offspring population correlated to the fruit ripening time.
Sato, A., Kono, A., Onoue, N. and Yamada, M. (2018). Incomplete loss of astringency in pollination-constant non-astringent (PCNA) offspring derived from Japanese and Chinese PCNA persimmon. Acta Hortic. 1195, 81-86
adaptability, breeding, fruit quality