Variety traits
Fruit acidity is a biological trait of a variety that determines taste quality, suitability for processing, and resistance to spoilage. It is assessed via the total concentration of all acids contained in the fruit.
Mentioned in descriptions 10 508 varieties reference book.
Fruit acidity is a biochemical quality indicator reflecting the sugar-acid ratio, which shapes the taste of the produce. This parameter determines the suitability of fruits for fresh consumption or industrial processing and also influences storage life, as an increased acidity level inhibits the development of pathogenic microorganisms.
For objective evaluation, the titratable acidity index is used, representing the total concentration of free acids and their salts. In laboratory conditions, this parameter is determined by the titration method using alkaline solutions until a fixed pH level is reached. The measurement results are expressed in grams per 100 grams of product or as a percentage.
In official variety testing, acidity is evaluated as one of the key quality indicators, often in combination with sugar content via the sugar-acid ratio. The final values of the trait depend on the crop species, although they are also influenced by the maturity stage of the fruits, growing conditions, and the mineral nutrition regime of the plants.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Jardin Botanique de Vauville (FR)
Vitis L. · Grapevine
Agroscope (CH)/Institut National de la Recherche Agronomique (FR)
Malus domestica (Suckow) Borkh. · Apple
Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka
Vitis vinifera L. · Common grape vine
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Vaccinium corymbosum L. · Highbush blueberry
Szkola Glowna Gospodarstwa Wiejskiego
Vitis vinifera L. · Common grape vine
LAND HESSEN GEISENHEIM| Land Hessen, vertreten durch FA f. Wein- und Gartenbau, Ge- traenketechnologie u.Landespflege-Fachgb. f.Rebenzuech.u.-veredl.-
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Information not available - Contact NL authorities
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Kurashima hiroshi|Nomoto Kazuo
Prunus domestica L. · European plum
Information not available - Contact NL authorities
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Vitis vinifera L. · Common grape vine
Dr. Johannes Zimmermann
Vitis vinifera L. · Common grape vine
HÖHERE BUNDESLEHRANSTALT UND BUNDESAMT FÜR WEIN UND OBSTBAU
Vaccinium corymbosum L. · Highbush blueberry
Szkola Glowna Gospodarstwa Wiejskiego
Malus domestica (Suckow) Borkh. · Apple
Boldyzheva Liubov Dmytrivna
Vitis vinifera L. · Common grape vine
Yordan K. Ivanov, Vasil Y. Valchev, Georgi S. Petkov, Boris A. Muzyichenko (RU), Arif M. Aliev (RU), Ivan A. Kostrikin (RU)
Prunus x gondouinii (Poit. & Turpin) Rehder · Duke cherry
Pepinieres et Roseraies Georges Delbard| FR
Vitis vinifera L. · Common grape vine
Gunvaldis Ilgvars Vesmins
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Darbonne Pepiniere| FR
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Malus domestica (Suckow) Borkh. · Apple
Pepinieres et Roseraies Georges Delbard| FR