青海青稞主栽品种（系）对条纹病和云纹病的抗性鉴定

摘要

Barley leaf stripe disease and leaf scald disease are very important diseases in barley growing regions in Qinghai Province.The resistance of 30 barley cultivars (lines)collected from Qinghai Province to leaf stripe and leaf scald was identified under natural conditions in the fields.The results showed that resistance level to leaf stripe and leaf scald differed significantly,however,there was lack of immune cultivars.For barley leaf stripe, there were 13 cultivars (lines)with high resistance,which accounted for 43.3% of the total identified cultivars (lines).To barley leaf scald,lines 1,2,6,17,28,RQKQ-3,RQKQ-5,RQKQ-6,RQKQ-7,RQKQ-8,and culti-vars ‘Mennong 1 ’,‘Huqing 2’,‘Beiqing 6’and ‘Kunlun 10’were highly resistant,lines 5,11,RQKQ-1, RQKQ-9,and cultivars ‘Baqing 1’,‘Beiqing 3’,‘Beiqing 7’and ‘Kunlun 13’were moderately resistant,and the others were highly susceptible or susceptible.%本研究旨在明确青海青稞主栽品种和后备品种对条纹病和云纹病的抗性，以期为抗病育种及田间病害防治提供理论依据。试验采用田间自然病圃法，对青海主栽的30个青稞品种（系）进行了条纹病和云纹病田间抗性鉴定。结果表明，供试青稞品种（系）对2种病害的抗性存在显著差异，但缺乏免疫品种。对条纹病表现高抗的有13个品种（系），占鉴定总数的43．3％，其中主栽品种有3个，即‘门农1号’、‘昆仑13号’、‘巴青1号’。品系17发病率最低。对云纹病表现高抗的有品系1、品系2、品系6、品系17、品系28、RQKQ-3、RQKQ-5、RQKQ-6、RQKQ-7、RQKQ-8、‘门农1号’、‘互青2号’、‘北青6号’和‘昆仑10号’，共14个，其病情指数均在10以下；表现中抗的共有8个，分别为品系5、品系11、RQKQ-1、RQKQ-9、‘巴青1号’、‘北青3号’、‘北青7号’和‘昆仑13号’。