Development of sugar beet monogerm and multigerm hybrids resistance to bolting
2005
Sadeghian ,Yaghouband | Ranji,Zabihollah | Aghaeizadeh , Mohsen | Habibkhodaei, Ali | Abdollahian Noqani , M.ohammad | Sharifi, Hamid | Orazyzadeh, Mohammad Reza | Shahbazi, Hassan Ali | Fotuhi, Keyvan | Baghaeikia, M | Bazrafshan, Mohsen | Basati, Jahanshah | Khodadadi, Shahram | Blurian,D. | Kouhestani, Manouchehr | Dastjerdi, Valiollah | Mndani,hassan | Bayat, Ali | Khajeh, Asghar | Vahedi, Saeed | Arab Zadeh, Morteza | Qasemi, Abbas
In a diploid hybrid programme, the development of inbred lines from the best sugar beet roots within a segregatin population in each cycle of selection appears to be more efficeint, at least in the long run. In the current study which started in 1994, crosses were made between a self-sterile elile multigerm and an o-type monogerm and the subsequent F2 segregating population provided a starting point for the development of desirahle materials resulting in diloid pollinators. Half-sib families extracted from the F2 population were tested for bolting, cercospora and agronomic characteristics. These malerials were examined in Dezful and other areas like Karaj, Shiraz, Mashhad, and Miandoab. The best pollinotors had been crossed to many CMS single crosses under isolation chambers. The resulting hybrids from various sources were tested in different locations across the country and the first diploid variety named shirin released in 2003. Anyhow, advanced S2-S3 lines are required to qualify hybrids obtained in this project. Here, we achived about 20 pollinators, more the 20 hybrids that can be introduced as commercial varieties as well as many single crosses with high general combining ability. Since nuclar male strelity (NMS) based on self-fertile plants is efficient in developing CMS lines and their equivalent o-types, it is also offered an attractive alternative for the development of multigerm pollinators, therefore, it is sugggested to emphasis on the improvement of hybrid varieties having at least one rhizomania resistant parent in the combination of commercicel varieties since many locations of sugar beet growing areas in Iran are infected by rhizomania.
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