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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.

Riesenboiken

Active

Malus domestica (Suckow) Borkh. · Apple

NL
7 records

Regine

Active

Malus domestica (Suckow) Borkh. · Apple

DE
6 records

Nibbio

Active

Lolium multiflorum Lam. · Italian ryegrass

IT
3 records

Rabiosa

Active

Lolium multiflorum Lam. ssp. italicum (A. Br.) Volkart · Italian ryegrass

DE
2 records

Prouni

Active

x Festulolium Aschers. et Graebn. · Festulolium

CZ
3 records

Prosika

Terminated

Dactylis glomerata L. · Cocksfoot

CZ
2 records

Pronger

Terminated

Lolium x hybridum Hausskn. · Hybrid ryegrass

CZ
3 records

Mowester

Terminated

Lolium multiflorum Lam. · Italian ryegrass

IT
2 records

Patron

Terminated

Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon

NL
2 records

Přemysl

Active

Beta vulgaris Sugar Beet Group · Sugar beet

CZ
2 records

Oryttus

Active

Lolium multiflorum Lam. · Italian ryegrass

DE
3 records

Progreen

Terminated

Lolium perenne L. · Perennial ryegrass

CZ
2 records

Portax

Active

Lolium multiflorum Lam. · Italian ryegrass

DE
2 records

Polysais Rossa

Active

Beta vulgaris Fodder Beet Group · Mangelwurzel

IT
2 records

Mirek

Protection expired

Lolium perenne L. · Perennial ryegrass

CZ
3 records

Polysais Gialla

Active

Beta vulgaris Fodder Beet Group · Mangelwurzel

IT
2 records

Pingo

Active

Malus domestica (Suckow) Borkh. · Apple

DE
3 records

Merwester

Terminated

Lolium multiflorum Lam. var. westerwoldicum Wittm. · Westerwolds Ryegrass

NL
2 records

Pepa

Terminated

Lolium perenne L. · Perennial ryegrass

CZ
3 records

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