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
XINGPING ZHANG
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Xingping Zhang, Syngenta Seeds Inc
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
PETOSEED CO
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
SANG JAE, LEE
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Seminis Vegetable Seeds
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Warren Barham.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Paul Degreef
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
XINGPING ZHANG
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Syngenta Crop Protection AG
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Seminis Vegetable Seeds (NL)
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Syngenta Seeds
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Syngenta Seeds
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Robert Bruce Carle
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Hazera Genetics Ltd (IL)
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
ZETA SEEDS S.L.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
NUNHEMS
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Paul Degreef
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Syngenta Participations AG
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
NUNHEMS
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Petoseed Company
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
HAZERA GENETICS