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.
Prunus persica (L.) Batsch · Peach
GAEC des Pepinieres Gromolard (FR)
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Rhododendron simsii Planch. · Indica azalea
Eleonore Dettmer und Peter Dettmer (als Gesellschaft des bürgerlichen Rechts)
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Vitis vinifera L. · Common grape vine
Hochschule Geisenheim University Institut für Pflanzenzüchtung Herrn Prof. Dr. Ernst Rühl
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Trifolium incarnatum L. · Crimson clover
PADANA SEMENTI ELETTE S.R.L.
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Ananas Mill. · Pineapple
Idefor (CI)/CIRAD-Flhor (FR)
Vitis vinifera L. · Common grape vine
Zdravko Zankov, Ivan Todorov, Kunyu Stoev
Vitis vinifera L. subsp. vinifera · Wine grape
Z. Zankov, I. Todorov, S. Pirgozliev, T. Nakova
Vitis vinifera L. · Common grape vine
Ovchynnikov Hryhorii Petrovych, Tarakhtii Liudmyla Ivanivna, Abliazova Aia Pavlivna, Tulaieva Maia Ivanivna, Dokuchaieva IEvheniia Mykolaivna,
Prunus persica (L.) Batsch · Peach
F.ZAIGER
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Vitis vinifera L. · Common grape vine
(CTA) DIRECCION GENERAL DE DESARROLLO RURAL. CENTRO DE TRANSFERENCIA AGROALIMENTARIA
Malus Mill. · Apple
Bergendal, Per-Olof
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Malus domestica (Suckow) Borkh. · Apple
Information not available - Contact NL authorities
Vitis vinifera L. · Common grape vine
Maliukina Nina Anatoliivna, Mazurenko Liudmyla Stepanivna, Kovalova Iryna Anatoliivna, Chysnikov Vitalii Stepanovych, Tulaieva Maiia Ivanivna,
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Solanum lycopersicum L. · Tomato
Hari Besels
Tulipa L. · Tulip
Savro B.V.
Prunus avium (L.) L. · Sweet cherry
Instytut Ogrodnictwa - Państwowy Instytut Badawczy