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Variety traits

Ploidy

Ploidy is the number of sets of chromosomes in a cell nucleus, which determines the biological properties and productivity of a variety. This trait is used in breeding to modify morphological parameters of plants, such as increasing fruit size.

Mentioned in descriptions 10 934 varieties reference book.

Ploidy reflects the number of sets of chromosomes in a plant cell nucleus. An organism can be diploid, having two sets, haploid with one, or polyploid, containing three or more sets. In agricultural practice, this indicator is an important factor in the productivity and stability of a variety, as polyploidy allows for targeted changes in the size of plant cells and organs.

The choice of ploidy level depends on the cultivation goals of a specific crop. The effect of polyploidy is not universal: while it serves as a tool for increasing productivity in some species, such as sugar beet, a diploid set remains critical for others to ensure normal seed set.

Ploidy assessment is conducted during the breeding process and state variety trials using flow cytometry, direct cytogenetic chromosome analysis, or indirect methods based on stomatal cell size. During trials, the stability of the chromosome set is verified, as any deviations, such as the appearance of aneuploid forms, can lead to reduced yields and increased crop variability.

Sources10

Breakdown by crop

Ploidy — Perennial Ryegrass 853 Apple Ploidy 479 Ploidy — Sugar beet 465 Ploidy — Italian ryegrass 278 Ploidy — Red Clover 252 Ploidy — Italian ryegrass 190 Ploidy — Hybrid Ryegrass 110 Watermelon ploidy 100 Ploidy — Westerwold ryegrass 95 Ploidy — Fodder Beet 55 Ploidy — Rye 49 Ploidy of pear 40 Mandarin Ploidy 31 Ploidy — Meadow Fescue 29 Citrus Ploidy 25 Beet Ploidy 24 Ploidy of Festulolium 24 Apple Ploidy 23 Ploidy — Japanese plum 21 Lily Ploidy 19 Alstroemeria Ploidy 19 Ploidy of orchardgrass 17 Ploidy of German chamomile 17 Ploidy of the European Plum 14

Found in these crops

Perennial ryegrass 853 Apple 498 Sugar beet 466 Italian ryegrass 278 Red clover 252 Italian ryegrass 191 Hybrid ryegrass 110 Watermelon 102 Westerwolds Ryegrass 95 Mangelwurzel 55 Rye 49 European pear 42

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.

Tracy Sun

Terminated

Prunus salicina Lindl. · Japanese plum

CHAMBERLIN TOM O.

2 records

Sapora

Terminated

Malus domestica (Suckow) Borkh. · Apple

Gerhard Baab

1 record

Sputknik

Active

Lolium perenne L. · Perennial ryegrass

DLF Seeds A/S

1 record

RBB7 34

Application submitted

Citrus L. · Citrus

IVIA

2 records

SAGA W2

Withdrawn

Prunus salicina Lindl. · Japanese plum

E.A.R.L. Les Hebrards

2 records

PAS501342

Withdrawn

Lobularia maritima (L.) Desv. · Sweet alyssum

Troy Thorup

1 record

OMET

Active

Citrus L. · Citrus

IVIA

1 record

Ombel

Active

Bromus catharticus Vahl var. catharticus · Rescue grass

RAGT 2N S.A.S

1 record

Ms147

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

JOHANSSON EVERT

1 record

Liberty

Terminated

Zantedeschia Spreng. · Arum-lily

Zantedeschiagroep Trendflor V.O.F.

2 records

Imerso

Withdrawn

Lolium multiflorum Lam. · Italian ryegrass

Euro Grass Breeding GmbH Co. KG

1 record

Jazz It Up

Terminated

Lilium L. · Lily

De Jong Beheer B.V.

1 record

Heat Wave

Terminated

Hosta Tratt. · Hosta

Kwekerij en Tuincentrum Van den Top

1 record

Julaxine

Active

Malus domestica (Suckow) Borkh. · Apple

Serge Collas

1 record

Fortuna

Terminated

Begonia x hiemalis Fotsch · Elatior Begonia

LUBBERTUS H.KOPPE

1 record

DL04796

Withdrawn

Lilium L. · Lily

De Looff Lily Innovation B.V.

1 record

Foyle

Terminated

Lolium x hybridum Hausskn. · Hybrid ryegrass

Agri-food and Biosciences Institute (AFBI Belfast)

1 record

Farum Æble

Active

Malus domestica (Suckow) Borkh. · Apple

1 record

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