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Information × Registration Number 0226U000317, (0124U000132) , R & D reports Title Creation of a sort-season sunflower hybrid with increased adaptability to environmental stressors at the initial stages of development popup.stage_title Створення скоростиглого гібриду соняшнику з підвищеним рівнем адаптивності до стресових факторів середовища на початкових етапах розвитку Head Kolomatska Valeriia P., Доктор сільськогосподарських наук Registration Date 08-01-2026 Organization Institute of Plant Breeding named after V. Ya. Yuriev of the National Academy of Agrarian Sciences of Ukraine popup.description1 The purpose is to create a sort-season sunflower hybrid with increased adaptability to environmental stressors that can exert significant negative effects on plants during their initial development popup.description2 Valuable promising sunflower lines - pollen sterility fixers ‘Kh 778 B’, ‘Kh 774 B’ and ‘Kh 776 B’ (productivity 35.00, 27.82 and 28.35 g/plant, respectively) with high combining ability were selected and transferred to the National Plant Gene Bank of Ukraine as sources of early ripeness; over the study years, they were superior to the tester lines in terms of productivity and had optimal levels of morphological characteristics. Based on the results, valuable ultra-early sunflower lines - fertility restorers KhZU 37 V’, ‘Kh 8418 V’, ‘Kh 8435 V’, ‘Kh 8448 V’, ‘Kh 8413 V’, ‘Kh 8465 V’, and ‘Kh 2122 V’ were identified; the lines combine high productivity (13.80 - 24.20 g/plant) with resistance to the pathogen of downy mildew. Experimental sunflower hybrids ‘Skh7701А’/’Kh2283V’ (2.65 t/ha), ‘Skh775А’/’Kh4413V’ (2.93 t/ha), ‘Skhх772А’/’Kh06134V’ (2.82 t/ha), ‘Skh779А’/’Kh06134V’ (2.99 t/ha), and ‘Skh776А’/’Kh06135V’ (2.77 t/ha) were shown to yield more than the check hybrid (‘Slavson’). An early-ripening sunflower hybrid, ‘IR Hrant’ was created; its vegetation period lasts 108 days; in competitive trials (2021-2025), it yielded 2.33 t/ha; the thousand-seed weight was 51.5 g; the oil content in seeds was 51.20%; and the oil output was 1074 kg/ha. This hybrid yielded 0.24 t/ha more than the check hybrid (‘Slavson’); the oil content in its seeds was 0.64% higher than that in hyb. ‘Slavson’ seeds; and the oil output was 1,074 kg/ha more than that from hyb. ‘Slavson’. High levels of valuable economic characteristics of early-ripening sunflower hybrid ‘IR Lehat’ were confirmed; according to the results of the state examination, they were recognized as meeting the requirements for growing in the Steppe and Forest-Steppe of Ukraine. Product Description popup.authors Nina M. Leonova Valentyna I. Syvenko Tetiana A. Sheliakina Borys P. Shepilov Viktor V. Andriienko Kateryna М. Makliak Viktor V. Kyrychenko Nadiia V. Kuzmyshena Tetiana M. Kyrash Serhii A. Chumachenko Dmytro V. Kurylych popup.nrat_date 2026-01-08 Close