Search academic texts

Information × Registration Number 0221U100684, 0119U100431 , R & D reports Title To improve assessment methods and to create sunflower lines for the breeding of short-season hybrids with increased adaptability to stress factors of the environment at the initial stages of development popup.stage_title Head Kolomatska Valerriia P., Доктор сільськогосподарських наук Registration Date 08-01-2021 Organization Plant Production Institute nd. a. V. Ya. Yuriev popup.description2 Study object - the adaptability of sunflower lines to environmental stressors during the initial stages of development and their combining ability for economically valuable traits. Purpose - to create sunflower lines with high combining ability for economically valuable traits to obtain high-yielding sunflower hybrids with high adaptability to environmental stressors during the initial stages of development. Methods - field, laboratory, statistical. Theoretical and practical results – the peculiarities of temperature mode and germination length in the method of cold germination of seeds, which can differente sunflower lines and hybrids by tolerance to low above-zero temperatures, were experimentally confirmed. Sunflower lines were differentiated by tolerance to low temperatures at the initial stages of development; 5 highly cold-tolerant lines were distinguished and identified as sources of this feature (Skh 1006 A, Skh 93 A, Kh 720 V, Kh 4913 V, and Skh 777 A). The genotypic diversity of sunflower lines by breeding traits and their variability over the years was determined. Hybrid combinations of different ripeness groups combining increased cold tolerance with valuable economic characteristics and resistance to downy mildew were identified. Scientific novelty - early-ripening and middle-early sunflower lines - fertility restorers, with high combining ability, high resistance to downy mildew (9 points), increased cold tolerance (3-9 points), yields exceeding those from the check accessions by 0.35-0.77 t/ha and oil content in seeds exceeding that of the check accessions by 1.88-3.44% (Kh 4913 V, Kh 15107 V [branching forms], Kh 5713 V, Kh 15157 V [single-calathidium forms]) have been selected. Implementation effectiveness - sunflower lines were transferred to the NCPGRU and are recommended for developing hybrids with increased adaptability to environmental stressors during the initial stages of development Product Description popup.authors Andriienko Viktor V. Kyrash Tetiana M. Kyrychenko Viktor V. Kuzmyshena Nadiia V. Kucherenko Yehor Yu. Syvenko Valentyna I. popup.nrat_date 2021-03-17 Close