Krasela - the first Bulgarian sunflower hybrid, resistant to broomrape (race Н) and stable yield potential under limited moisture conditions

Nina Nenova

Nina Nenova

Abstract: Plant responses to stress are an increasingly frequent subject of research investigations, especially if the stress factors are biotic and abiotic. The parasite broomrape can reduce sunflower yields to zero levels, and as climate change intensifies, droughts are getting longer, affecting agriculture and human livelihoods. In the breeding programs of Dobrudzha Agricultural Institute - General Toshevo main objective is to create drought-resistant and disease-resistant hybrids sunflower. The aim of this study is to make a complete characterization of the conventional sunflower hybrid Krasela and its reaction to the resistance of the parasite Orobanche cumana Wallr. (race H) in a particularly dry and middle wet year. There are a different Ecological experiments in different regions of Bulgaria /three points - Brashlen, Radnevo and Selanovtsi/ and Ukraine /2 points - Zaporozhye and Kirovograd/. The indicators "seed yield", "oil yield" compared to the relevant standard during the years of testing and the resistance of the hybrid to diseases - mildew, fhoma, fhomopsis, and the parasite Orobanche cumana are observed and traced. Over the years of the study, hybrid Krasela has shown stable yields, even in the particularly dry year – 2020 and the middle wet 2019 year.

Keywords: biotic and abiotic stress factors; hybrid; Orobanche cumana Wallr.; sunflower

Citation: Nenova, N. (2025). Krasela – the first Bulgarian sunflower hybrid, resistant to broomrape (race Н) and stable yield potential under limited moisture conditions. Bulg. J. Agric. Sci., 31(2), 367–371.

References: (click to open/close)

Encheva, J., Georgiev, G., Nenova, N., Valkova, D., Georgiev, G. & Christov, M. (2014). Developing sunflower lines and hybrids resistant to herbicides. Field Crops Studies, IX(1), 57-68 (Bg).
Encheva, J., Georgiev, G., Nenova, N., Valkova, D., Georgiev, G. & Christov, M. (2015). Developing sunflower lines and hybrids resistant to herbicides. Plant Breeding Sciences, LII(4), 3-11 (Bg).
Encheva, J., Georgiev, G., Valkova, D. & Encheva, V. (2016). Development of sunflower hybrids resistance to herbicides. Proceedings of 19th International Sunflower Conference 29 May - 3 June, 2016, Edirne, Turkey, Issue 1, 465-473.
Encheva, V. & Kiryakov, I. (2002). Method for evaluation of sunflower resistance for Diaporthe (Phomopsis) helianthi Munt. Bulg. J. Agric. Sci., 8(2-3), 219-222.
Georgiev, G. (2015). Characterization of a new Bulgarian sunflower hybrid Velko. Research communications of Agrarian University - Plovdiv, LIX, vol.2, 133-144 (Bg).
Georgiev, G. (2016). Characterization of the Bulgarian sunflower hybrid Valin. Agricultural Science and Technology, 8(3), 183-188.
Georgiev, G. (2017). Characterization of the new Bulgarian hybrid Gabi. Second International Balkan Agriculture Congress, 16-18th May 2017, Tekirdağ, Turkey, 419 – 427.
Georgiev, G. & Encheva, V. (2014). Veleka – a new Bulgarian sunflower hybrid. Field Crops Studies, IX (1), 79-87 (Bg).
Georgiev, G., Encheva, V., Nenova, N., Encheva, Y., Valkova, D., Peevska, P. & Georgiev, G. (2015). Vokil – a new Bulgarian sunflower hybrid. Agricultural Science and Technology, 7(3), 287-292 .
Nenova, N., Valkova, D., Encheva, J. & Taxin, N. (2014). Promising lines as a results from interspecific hybridization between cultivated sunflower (H. annuus L.) and the perennial. Turkish Journal of Agricultural and Natural Sciences, 1(2), 1654-1659.
Nenova, N., Valkova, D., Encheva, V. & Georgiev, G. (2016). Comparative investigation of immature embryos growing of interspecific hybrids. 19th International Sunfower Conference, Congress book – Association of Thrace Universities, Edirne, Turkey, 460– 464.
Peevska, P. & Georgiev, G. (2016). A new Bulgarian sunflower hybrid Dea. 19th International Sunflower Conference, Edirne, Turkey, 475-483.
UPOV (2002). Protocol for distinctness uniformity and stability tests (Helianthus annuus L.). European Union Community Plant Variety Office, 10-28.
Valkova, D., Penchev, E., Encheva, V. & Nenova, N. (2017). Production potential of experimental IMI-resistant sunflower hybrids. Second International Balkan Agriculture Congress, 16-18th May 2017, Tekirdağ, Turkey, 443-447.

Date published: 2025-04-28

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