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近年来,在上海郊区种植的“早熟三号”大麦,容易感染黄花叶病。由于复种指数高,轮作调茬困难,连年种植“早熟三号”的田块越来越多,病害日趋严重。有些县明显发病田块面积占10％左右,重病田块减产20～80％。根据复旦大学生物系病毒组研究,黄花叶病是由禾谷类多粘菌(Polymyxa graminiLed)作介体的新病毒。采取轮作、推迟播种期、调整追肥时间等措施,控制其发展和危害,虽有一定效果,但对产量仍有较大影响。因此,迫切需要选育抗黄花叶病二棱大麦品种。近两年来,我们相继对亲本、杂种后代
In recent years, “precocious three” barley planted in the suburbs of Shanghai is susceptible to yellow mosaic disease. Due to the high multiple cropping index and the difficulty of crop rotation and stubble cultivation, more and more plots were planted year after year for the “Early Maturing No.3” and the disease was becoming more and more serious. Some counties significantly affected the area of 10% of the plots, severely affected plots reduced 20 ~ 80%. According to the Fudan University Department of Biology virus group, yellow mosaic virus is a new virus mediated by Polymyxa graminiLed. Measures such as rotation, postponement of sowing and adjustment of top dressing time and other measures to control its development and harm have certain effects on output but still have a greater impact. Therefore, there is an urgent need to breed anti-yellow mosaic barley barley varieties. The past two years, we have one after another on the parents, hybrid offspring