科研之友
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摘要
Improvement of assessment methods and selection of new robust sources of resistance, are wheat pre-breeding goals of outmost importance at NARDI Fundulea. Natural occurrence of FHB/DON contamination, host resistance and pathogen aggressiveness in current Triticum aestivum/Fusarium pathosystems under artificial inoculation were investigated. Analysis of 715 wheat samples collected from natural conditions revealed up to 10% risks of fungus contamination in three out of 15 environments, locations Livada (N/W Romania) and Pitesti-Albota (S/W Romania), being relatively the most vulnerable to FHB occurrence. Level of DON accumulation in grain was generally under 1.25 mg/kg, the limit reinforced for grain by UE regulations. A broad range of variation for aggressiveness in seedling and adult stages among 30 and 10 respectively, Fusarium accessions collected from five locations was found. Based on varietal response to FHB inoculation performed with both, point and spray inoculation methods, phenotypic differences between resistance types of 20 wheat Romanian cultivars were noticed that suggest association of resistance Type 1 and 2 (Dumbrava, Delabrad, Dor) or prevalence of Type 1 (Izvor, Crina, Magistral).
- 出版日期2010
