Variety traits
Citrullus lanatus (Thunb.) Matsum. & Nakai
The ploidy of watermelon, Citrullus lanatus, defines the genetic status of the plant: diploid (2n=22), tetraploid (4n=44), and triploid (3n=33) forms, which is critical for the production of seedless hybrids.
In the reference 100 varieties crop Watermelon, where this is mentioned in the description.
In watermelon breeding, three ploidy levels are distinguished: diploids with a set of 2n=22, tetraploids with 4n=44, which serve as parent lines, and triploids with 3n=33, which represent seedless hybrids. Cytogenetic analysis, flow cytometry, and indirect indicators such as stomatal size and chloroplast count are used to identify the ploidy level.
Triploid plants are sterile and require the planting of diploid pollinator varieties in schemes, such as 3:1, to ensure fruit set. The cultivation of triploids is characterized by higher requirements for germination due to the dense seed coat, which makes direct seeding in the soil undesirable and necessitates strict control of temperature and substrate moisture.
Polyploidization aimed at obtaining tetraploid forms leads to structural changes in the plant: stem thickening, increased cell size, and changes in leaf shape. These morphological alterations can affect the crop's resistance to stress factors, including soil salinity.
General information about the subject — on the page Ploidy.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
HAZERA SEEDS BV
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
HOLLAR SEEDS
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Sporogenesis, GR
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
PETOSEED CO
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
SEMILLAS FITO' S.A.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Enza Zaden Beheer B.V.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Nunhems B.V.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
ISI SEMENTI SPA
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Wun - Yu Chen
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Eran Yossov
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Syngenta Participations AG
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
S&G SEEDS B.V.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
PETOSEED CO
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
NOVARTIS SEEDS B.V.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Hybrids Ellas Abee
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
ZERAIM GEDERA
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Seminis Vegetable Seeds
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
James Brusca
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Syngenta Seeds B.V.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Syngenta Participations AG
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
INTERSEMILLAS SAU
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
PETOSEED CO
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
LA SEMIORTO SEMENTI SRL
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Nunhems B.V.