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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.

Merulaxe

Active

Lolium x hybridum Hausskn. · Hybrid ryegrass

GIE GRASS (FR)

FR
4 records

Meltoro

Active

Lolium perenne L. · Perennial ryegrass

ILVO-PLANT 39

BE
3 records

MHR Nela

Active

Trifolium pratense L. · Red clover

Malopolska Hodowla Roslin Spolka z o.o.

PL
4 records

Maritim

Terminated

Lolium perenne L. · Perennial ryegrass

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG. Herrn Dr. Martin Frauen / Inge Gaue

DE
4 records

Malmi

Protection expired

Lolium multiflorum Lam. · Italian ryegrass

Enno Ennen

DE
6 records

Melkana

Active

Lolium perenne L. · Perennial ryegrass

ILVO Plant

NL
4 records

Mańka

Active

Lolium x hybridum Hausskn. · Hybrid ryegrass

Poznanska Hodowla Roslin Sp. z o.o

PL
4 records

Melsmart

Active

Lolium perenne L. · Perennial ryegrass

ILVO-PLANT 39

BE
3 records

Melpico

Terminated

Lolium perenne L. · Perennial ryegrass

ILVO-PLANT 39

BE
3 records

Merseval

Active

Lolium perenne L. · Perennial ryegrass

ILVO-PLANT 39

BE
3 records

Luxane

Terminated

x Festulolium Aschers. et Graebn. · Festulolium

Agri Obtentions SA (FR)/Institut National de la Recherche Agronomique (FR)

FR
4 records

Mavado

Active

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

Sporogenesis, GR

CZ
3 records

Lorettaviva

Terminated

Lolium perenne L. · Perennial ryegrass

ESKUSA GmbH Herrn Dr. Fred Eickmeyer

DE
4 records

Lipronto

Terminated

Lolium perenne L. · Perennial ryegrass

Dipl.Ing.agr. Heiner Busch in Fa. Deutsche Saatveredelung AG / Dipl.Ing. agr. Cord Schumann

DE
4 records

Lilio

Active

Lolium multiflorum Lam. · Italian ryegrass

ZIGNANI LINO PIERO SAS DI ZIGNANI L. E C.

IT
3 records

Litoral

Active

Lolium perenne L. · Perennial ryegrass

ROCALBA S.A.

PT
3 records

Lina DS

Active

x Festulolium Aschers. et Graebn. · Festulolium

Lietuvos agrarinių ir miškų mokslų centras

LT
4 records

Licampo

Protection expired

Lolium perenne L. · Perennial ryegrass

Dipl.Ing.agr. Heiner Busch in Fa. Deutsche Saatveredelung AG / Dr. Ulf Feuerstein

DE
4 records

Loreley

Active

Trifolium pratense L. · Red clover

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG. Herrn Dr. Martin Frauen / Wilbert Luesink

DE
5 records

Lusilium

Terminated

x Festulolium Aschers. et Graebn. · Festulolium

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

FR
3 records

Loggia

Terminated

Lolium perenne L. · Perennial ryegrass

Philipp Berner (+) / ESKUSA GmbH Herrn Dr. Fred Eickmeyer

DE
4 records

Lobrac

Active

Lolium perenne L. · Perennial ryegrass

GIE GRASS (FR)

FR
4 records

Logics

Active

Lolium multiflorum Lam. · Italian ryegrass

DLF Seeds A/S

SK
3 records

Liconda

Protection expired

Lolium perenne L. · Perennial ryegrass

Euro Grass Breeding GmbH Co. KG

DE
4 records

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