Nina Nenova
Agricultural Academy, Dobrudzha Agricultural Institute, 9521 General Toshevo, Bulgaria
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
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.