Variety traits
Helianthus annuus L.
The generative organ of the sunflower is a capitulum, the morphology of which serves as a key criterion in the selection evaluation of varieties and the determination of their potential yield.
In the reference 38 varieties crop Sunflower, where this is mentioned in the description.
The sunflower inflorescence is evaluated during the flowering phase based on traits such as head diameter, receptacle shape, and the density of disc florets. Oilseed varieties are typically characterized by medium-sized heads, whereas confectionery varieties can reach 30–50 cm in diameter. A size of 20–25 cm is considered optimal for productivity, as excessive head growth leads to receptacle deformation and an increase in the proportion of empty achenes in the center.
Capitulum morphology and its angle of inclination directly affect agronomic parameters: pollination efficiency, risk of disease incidence, including white mold, and achene losses during harvesting. Breeding efforts are focused on creating a compact arrangement of disc florets and an optimal head structure to ensure uniform seed development across all zones of the inflorescence.
General information about the subject — on the page Inflorescence.
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.
Helianthus annuus L. · Sunflower
Syngenta Crop Protection AG
Helianthus annuus L. · Sunflower
Rene Baraten
Helianthus annuus L. · Sunflower
Quality Crops Agro, RO
Helianthus annuus L. · Sunflower
CAUSSADE SEMENCES
Helianthus annuus L. · Sunflower
FOURNEAU Michael
Helianthus annuus L. · Sunflower
JOSE RAMON PEREZ MONREAL
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Helianthus annuus L. · Sunflower
Sadik El Sayed
Helianthus annuus L. · Sunflower
Rustica Prograin Genetique
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
Euralis Semences
Helianthus annuus L. · Sunflower
Institut za ratarstvo i povrtarstvo, Novi Sad
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
Union des Cooperatives de Semences de Tournesol (FR)/Institut National de la Recherche Agronomique (FR)
Helianthus annuus L. · Sunflower
Mamonov Andrii Ivanovych, Liebiedovs`kyi IUryi Anatoliiovych, Kotliarova Iryna Oleksiivna, Pihrova Svitlana Kuz`mivna, Detsyna Oleksandr Oleksandrovych, Ilatovs`kyi Volodymyr Platonovych, Voloshyna Ol`ha Ivanivna, Borodin Serhii Heorhiiovych,