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.

Gros Courbu

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Gamay Fréaux

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Gergana

Active

Vitis vinifera L. · Common grape vine

P. Kurtev, D. Babrikov

1 record

Gouget

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Gouais blanc

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

General Leclerc ISK

Active

Pyrus communis L. · European pear

Instytut Ogrodnictwa - Państwowy Instytut Badawczy

1 record

Gala Dark

Application submitted

Malus domestica (Suckow) Borkh. · Apple

Ryszard Nowakowski

3 records

Genouillet N

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

FLHORAN41

Terminated

Ananas Mill. · Pineapple

CIRAD-Flhor (FR)

1 record

FROUFROU ROSE

Withdrawn

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

SICAMUS (FR)

1 record

Funnyplums Yellow

Withdrawn

Solanum lycopersicum L. · Tomato

Hem Zaden B.V.

2 records

FERTOEDI KARMIN

Terminated

Rubus idaeus L. · Red raspberry

Kollanyi Laszlo / German Istvanne

1 record

Fuji Brak

Terminated

Malus Mill. · Apple

Alois Braun

1 record

Felen

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Feminello

Active

Citrus x limon (L.) Osbeck · Lemon

INCONNU (FR)

1 record

FANTANGO

Terminated

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

HORTICULTURE RESEARCH I.

2 records

Fortune 2

Active

Prunus salicina Lindl. · Japanese plum

Budzynskyi Oleksandr Serhiiovych,Yarmoliuk Ivan Savych,

2 records

Florina ISK

Terminated

Malus domestica (Suckow) Borkh. · Apple

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

1 record

Faberrebe

Active

Vitis vinifera L. · Common grape vine

LAND RHEINLAND OPPENHEIM| Land Rheinland-Pfalz, vertreten durch das DLR Rheinhessen-Nahe-Hunsrueck Dienstsitz Oppenheim

2 records

EXTREME JULY

Terminated

Prunus persica (L.) Batsch · Peach

VIVEROS PROVEDO, S.A.

1 record

EXTREME WHITE

Terminated

Prunus persica (L.) Batsch · Peach

VIVEROS PROVEDO, S.A.

1 record

Fidelio

Application submitted

Vitis vinifera L. · Common grape vine

Prof. Dr. H. Becker

4 records

Feunate

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Felicia

Active

Vitis vinifera L. · Common grape vine

Dr. Rudolf Eibach / Prof. Dr. Reinhard Töpfer

2 records

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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.