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带有不同白粉病抗性基因且具有品种“Pallas”遗传背景的24个大麦近等基因系分别于1987、1989、1990年在西班牙具有对比性的试验点上种植.使其在自然状态下接受病原菌的浸染,以便研究病原菌的致病性。毒性基因以不同地理位置可分成3个组.即西部(巴利亚多利德省)、南部(塞维利亚省)、北部和东北部(纳瓦拉、Lleida和Girona省)。与纳瓦拉和巴利亚多利德相比.Lleida的白粉病群体的可变性较大。最有效的抗性基因是Ml-a13+mL-(Ru3),ml-o及Ml-(1402)。
The 24 barley isogenic lines with different powdery mildew resistance genes and having the “Pallas” genetic background were planted at Spanish comparative test points in 1987, 1989, and 1990, respectively, to allow their acceptance under natural conditions Pathogen infection, in order to study the pathogenicity of pathogens. Toxic genes can be divided into three groups in different geographic locations: the west (Valladolid), the south (Seville), the north and the northeast (Navarra, Lleida and Girona). Compared with Navarre and Valladolid, the population of powdery mildew in Leida is more variable. The most effective resistance genes are Ml-a13 + mL- (Ru3), ml-o and Ml- (1402).