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现有的硬质红粒春小麦(Triticum aestivum L. em Thell.)品种对于由病原菌Cochliobolus sativus (Ito和Kurib) Dreschl.ex Das ur引起的根腐病仅表现中抗水平.本研究的目的是鉴定来自方穗山羊草(节节麦)和冰草属几个种的小麦异源双倍体和染色体代换系是否能作为根腐病的新抗原.建立了携带根腐病抗性的Agrotana即小麦-茸毛冰草双倍体的温室研究系列.对由方穗山羊草第1-7条染色体代换冬小麦品种Winalta D组染色体的代换系的试验表明,它们对根腐病严重程度的影响不稳定.同样,长穗冰草部分同源染色体代换Winalta 4D、5D和6D染色体的代换系,以及中间冰草的第4条染色体代换Winalta 4B染色体的代换系,对根腐病严重程度没有影响.地下根颈节间的分离培养表明,用C.sativus侵染Agrotana,植株发病率明显比其他外来品系和普通小麦品种都低,这表明Agrotana可能对根腐病具有特异的抗性机制.
The existing cultivars of Triticum aestivum L. em Thell. Were only moderately resistant to root rot caused by the pathogens Cochliobolus sativus (Ito and Kurib) Dreschl.ex Das ur The objective of this study was to identify Whether wheat heterosis and chromosome substitution lines from several species of Aegilops fern (Aegilops ferrugale) and Agropyron species could be regarded as new antigens of root rot, and established Agrotana Wheat-Velvetleau harensis diploid greenhouse series.Experimental studies on the substitution lines of the chromosomes of the Winalta D group of chromosome 1-7 substitution substitutions of Fusarium graminearum showed that they had an effect on the severity of root rot In the same way, some homologous chromosomes of Alternanthera philoxeroides replaced the substitution lines of Winalta 4D, 5D and 6D chromosomes, and the substitution lines of chromosome 4 of Agropyron intermedius replaced Winalta 4B, Separation of underground root and neck nodes showed that Agrotana was significantly less susceptible to Agrotana infection than C. altivus than other exotic and common wheat cultivars, indicating that Agrotana may have specific resistance to root rot Sexual mechanisms.