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¹ Trakya Tarımsal Araştırma Enstitüsü, Edirne
² Trakya Üniversitesi, Mühendislik Fakültesi, Genetik ve Biyomühendislik Bölümü, Edirne
³ Namık Kemal Üniversitesi, Ziraat Fakültesi, Bitki Koruma Bölümü, Tekirdağ DOI : 10.21566/tarbitderg.280246 - The objective of this study was to develop IMI (Imidazolinone) group herbicide resistant rice varieties to control weedy rice (red rice) and the weed gained resistance against conventional rice herbicides in the rice fields. A resistant rice variety to IMI group herbicide was provided from abroad and it was utilised as resistance source in this study. This variety was crossed with Turkish commercial rice varieties at Trakya Agricultural Research Institute in 2007 and thirteen cross combinations were obtained. Some segregating material were created and the modified bulk selection method was practiced for the selection, for this the planting and harvesting were done as bulk at F₂ generation and the harvesting was practiced as single plant selection at F₃ generation. After selection the pure lines, they were tested in observation nursery, preliminary yield and yield trial, respectively. The yield trials were conducted in randomised complete block experiment design with three replications. Some selected IMI rice lines were tested in the yield trials in 2013 and 2014. Five of them had good performance in term of rice yield, agronomic and quality traits. They were nominated for registration as commercial varieties in the end of 2014. At the same time, the production permission was taken two of them, under the name of IMI 2521 and IMI 2554. Keywords : Rice (Oryza sativa L.), imidazolinone group herbicide, IMI rice variety, red rice