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.
Fragaria L. · Strawberry
Howard, Charles M.|deceased, late of Dover, FL, by Billie L. Howard, executor
Prunus armeniaca L. · Apricot
The State University of New Jersey - Rutgers (US)
Vitis L. · Grapevine
GUIDO CIPRIANI/GABRIELE DI GASPERO/MICHELE MORGANTE/ENRICO PETERLUNGER/RAFFAELE TESTOLIN/ SIMONE DIEGO CASTELLARIN
Vitis vinifera L. · Common grape vine
Simone Diego Castellarin^^^Guido Cipriani^^^Gabriele Di Gaspero^^^Michele Morgante^^^Enrico Peterlunger^^^Raffaele Testolin
Malus domestica (Suckow) Borkh. · Apple
Prof. Dr. Manfred Fischer / Heinz Murawski + im Institut für Obstforschung Dresden-Pillnitz / Prof. Dr. Christa Fischer
Lupinus angustifolius L. · Narrow-leaf lupin
Poznanska Hodowla Roslin Sp. z o.o
Hydrangea L. · Hydrangea
PREISIG| Walter Preisig
Ribes nigrum L. · Blackcurrant
Instytut Ogrodnictwa, PL
Fragaria L. · Strawberry
THE BRITISH SOCIETY FOR HORTICULTURAL RESEARCH
Prunus domestica L. · European plum
Thomas O. CHAMBERLIN (US)
Hydrangea L. · Hydrangea
HORN HEINZ| Heinz Horn
Medicago sativa L. · Alfalfa
SAATBAU LINZ EGEN
x Triticosecale Wittm. ex A. Camus · Triticale
HODOWLA ROSLIN SZELEJEWO- DR. WOJEICH MIKULSKI
Agrostis capillaris L. · Common bent
Ceccato Sementi (IT)
Rubus L. subg. Rubus · Blackberry
Niwa Hodowla Roślin Jagodowych sp. z o.o.
Malus domestica (Suckow) Borkh. · Apple
VAN WELL NURSERY (US)
Prunus cerasus L. · Sour cherry
Sagaplant AS, N-3812 Akkerhaugen
Pyrus communis L. · European pear
VÝZKUMNÝ A ŠLECHTITELSKÝ ÚSTAV OVOCNÁŘSKÝ HOLOVOUSY s.r.o. (CZ)/Prof. Dr. Manfred Fischer (DE)
Secale cereale L. · Rye
Danko Hodowla Roslin Sp.z.o.o.
Vitis L. · Grapevine
GUIDO CIPRIANI/GABRIELE DI GASPERO/MICHELE MORGANTE/ENRICO PETERLUNGER/RAFFAELE TESTOLIN/ SIMONE DIEGO CASTELLARIN
Pyrus communis L. · European pear
RUP «BRESTSKAYA OBLASTNAYA SELSKOXOZYAJSTVENNAYA OPYTNAYA STANCZIYA NAN BELARUSI»
Vitis vinifera L. · Common grape vine
Simone Diego Castellarin^^^Guido Cipriani^^^Michele Morgante^^^Enrico Peterlunger^^^Raffaele Testolin^^^Gabriele Di Gaspero
Malus domestica (Suckow) Borkh. · Apple
STICHTING DLO-CENTRUM VOOR PLANTENVEREDELINGS-EN
Malus domestica (Suckow) Borkh. · Apple
Prof. Dr. Hanna Schmidt / Dr. Jutta Krüger in Bundesforschungsanstalt für gartenbauliche Pflanzenzüchtung