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Postharvest Properties of Ultra-Late Maturing Peach Cultivars and Their Attributions to Melting Flesh (M) Locus: Re-evaluation of M Locus in Association With Flesh Texture by Nakano, Ryohei; Kawai, Takashi; Fukamatsu, Yosuke; Akita, Kagari; Watanabe, Sakine; Asano, Takahiro; Takata, Daisuke; Sato, Mamoru; Fukuda, Fumio; Ushijima, Koichiro is a Agricultural and Biological Sciences article available to read on EtoBox.

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The postharvest properties of two ultra-late maturing peach cultivars, “Tobihaku” (TH) and “Daijumitsuto” (DJ), were investigated. Fruit were harvested at commercial maturity and held at 25°C. TH exhibited the characteristics of normal melting flesh (MF) peach, including rapid fruit softening associated with appropriate level of endogenous ethylene production In contrast, DJ did not soften at all during 3 weeks experimental period even though considerable ethylene production was observed. Fruit of TH and DJ were treated with 5,000 ppm of propylene, an ethylene analog, continuously for 7 days. TH softened rapidly whereas DJ maintained high flesh firmness in spite of an increase in endogenous ethylene production, suggesting that DJ but not TH lacked the ability to be softened in response to endogenous and exogenous ethylene/propylene. DNA-seq analysis showed that tandem endo-polygalacturonase (endoPG) genes located atmelting flesh (M)locus,Pp-endoPGM(PGM), andPp-endoPGF(PGF), were deleted in DJ. TheendoPGgenes atMlocus are known to control flesh texture of peach fruit, and it was suggested that the non-softening property of DJ is due to the lack ofendoPGgenes. On the other hand, TH p

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Author

Nakano, Ryohei; Kawai, Takashi; Fukamatsu, Yosuke; Akita, Kagari; Watanabe, Sakine; Asano, Takahiro; Takata, Daisuke; Sato, Mamoru; Fukuda, Fumio; Ushijima, Koichiro

Publisher

Frontiers Media SA; Frontiers Media S.A.; Lausanne: Frontiers Media S.A., 2010- (ISSN 1664-462X)

Published

2020

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)