Variety traits

Fruit acidity

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.

Sources10

Breakdown by crop

Grape acidity 1 160 Grape acidity 507 Acidity of apple fruit 202 Peach fruit acidity 116 Tomato Fruit Acidity 116 Blueberry fruit acidity 52 Acidity of sweet cherry fruit 32 Olive Fruit Acidity 32 Fruit Acidity — Garden Strawberry 32 Apricot fruit acidity 21 Lemon Fruit Acidity 20 Acidity of Mandarin Fruits 18 Fruit acidity — Sour cherry 17 Citrus fruit acidity 16 Orange Fruit Acidity 16 Blackberry Fruit Acidity 15 Plum fruit acidity 13 Fruit acidity — Japanese plum 13 Pear fruit acidity 12 Acidity of oat grains 9 Tomato Fruit Acidity 8 Acidity of Apple Fruit 7 Raspberry fruit acidity 7 Acidity of kiwifruit 6

Found in these crops

Grapevine 1 163 Common grape vine 507 Apple 505 Bigleaf hydrangea 301 Tomato 238 Peach 194 European pear 127 Sweet cherry 122 Garden strawberry 86 Highbush blueberry 77 Apricot 58 European plum 48

Varieties that feature this in their description

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.

TEAK GOLD

Terminated

Prunus domestica L. · European plum

TEAK ENTERPRISE (AU)

1 record

Tecozautla

Application submitted

Solanum lycopersicum L. · Tomato

Bejo Zaden B.V.

2 records

Szampion ISK

Active

Malus domestica (Suckow) Borkh. · Apple

Instytut Ogrodnictwa - Państwowy Instytut Badawczy

1 record

Tangra

Active

Vitis vinifera L. · Common grape vine

Ivan Todorov, Galina Dyakova

2 records

Super ran bolgar

Active

Vitis vinifera L. subsp. vinifera · Wine grape

Kunyu D. Stoev, Yordan K. Ivanov, Zdravko D. Zankov, Vasil Y. Valchev

2 records

Tamira

Protection expired

Rhododendron simsii Planch. · Indica azalea

Hermann Glaser

1 record

Sweet Dreams

Active

Hydrangea L. · Hydrangea

André Smaal c/o Hydrangea Breeders Association B.V.

1 record

Svaroh

Active

Ribes uva-crispa L. · Gooseberry

Lushpihan Ol`ha Petrivna

6 records

Sugrathirteen N

Withdrawn

Vitis vinifera L. · Common grape vine

Sun World International, Inc (US)

1 record

Sugraone B

Withdrawn

Vitis vinifera L. · Common grape vine

Sun World International, Inc (US)

1 record

Sukholymans'kyi bіlyi

Active

Vitis vinifera L. · Common grape vine

Kostiuk Oleksii Nikiforovych, Dokuchaieva IEvheniia Mykolaivna, Tsebrii Mykhailo Petrovych, Aivazian Petros Karapetovych,

1 record

SPRING RAY

Terminated

Prunus persica (L.) Batsch · Peach

BURCHELL NURSERY INC.

2 records

Souvignier Gris

Active

Vitis vinifera L. · Common grape vine

Dr. Norbert Becker im Staatl. Weinbauinstitut

2 records

SoÄa

Terminated

Medicago sativa L. · Alfalfa

Semenarna Ljubljana d.d.

1 record

SHIN LI

Withdrawn

Pyrus communis L. · European pear

The Regents of the University of California (US)

1 record

Shanon F1

Application submitted

Solanum lycopersicum L. · Tomato

Rene Khenkuet

2 records

Schoenburger

Protection expired

Vitis vinifera L. · Common grape vine

Hochschule Geisenheim Institut fuer Rebenzuechtung

1 record

Schniga

Application submitted

Malus Mill. · Apple

SCHNITZER FRANZ

1 record

Savagnin rose

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Sauvignon gris

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Servanin

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Savagnin blanc

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Saperavi N

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Sciacarello

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

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Variety traits

Maturity group 89 063
Yield 67 000
Vigor 53 548
Plant height 51 504
Lodging 50 198
Taste and aroma 36 010
Variety origin 29 523
Productivity 27 845

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.