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.
Vitis vinifera L. · Common grape vine
LOMBARDI GENETICS (PTY) LTDA
Malus domestica (Suckow) Borkh. · Apple
White Allan G|Havelock North, NZ
Malus domestica (Suckow) Borkh. · Apple
SOUTHERN TREES LIMITED
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Terrance C. Moran^^^Michael D. Ferguson
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
VPP Corporation
Vaccinium corymbosum L. · Highbush blueberry
Patel Narandra
Vitis L. · Grapevine
SUN WORLD INTERNATIONAL
Malus domestica (Suckow) Borkh. · Apple
RUTGERS STATE UNIVERSITY
Malus domestica (Suckow) Borkh. · Apple
Prof. Dr. Manfred Fischer / Heinz Murawski + im Institut für Obstforschung Dresden-Pillnitz / Prof. Dr. Christa Fischer
Brassica oleracea L. (Cauliflower Group) · Cauliflower
SVS Holland B.V.
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
PLANTAS DE NAVARRA, S.A.(PLANASA)
Malus domestica (Suckow) Borkh. · Apple
VERHAEGH| Jacobus Johannes Verhaegh
Malus domestica (Suckow) Borkh. · Apple
Zima Jan, Louda Otto, Tupy Jaroslav,
x Triticosecale Wittm. ex A. Camus · Triticale
Danko Hodowla Roslin Sp.z.o.o.
Hordeum vulgare L. · Barley
Reino Aikasalo
Malus domestica (Suckow) Borkh. · Apple
National Fruit Trials (R. Stapleton)
Vaccinium corymbosum L. · Highbush blueberry
Szkola Glowna Gospodarstwa Wiejskiego
Gypsophila L. · Baby's breath
Michael Danziger
Prunus avium (L.) L. · Sweet cherry
Vyzkumny a Šlechtitelsky Ustav,CZ
Malus domestica (Suckow) Borkh. · Apple
Neumuller Michael
Malus domestica (Suckow) Borkh. · Apple
WILLIAM DAVID LANE
Hybrids between Citrus reticulata Blanco and Citrus sinensis (L.) Osbeck · Orange
Susan Ruth Jenkin^^^Allen Ward Jenkin
Malus domestica (Suckow) Borkh. · Apple
The New Zealand Institute for Plant and Food Research
Citrus reticulata Blanco · Mandarin orange
VARDI, ALIZA SPIEGEL-ROY, P. ELCHANATI, A. FRIEDMAN, AHUVA NOYMAN, CHANA