Frequency of Powdery Mildew Resistances in Spring Barley Cultivars in Czech Variety Trials
Frequency of Powdery Mildew Resistances in Spring Barley Cultivars in Czech Variety Trials
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DOI：
10.17221/11/2011-pps
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发表时间：
2012-01-01
影响因子：
1.3
通讯作者：
Dreiseitl, Antonin
中科院分区：
文献类型：
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作者：
Dreiseitl, Antonin
2006-2010年对277个春大麦品种的白粉病抗性进行了研究。捷克官方品种试验中有54个品种，其中42个是外国品种，同期国内育种公司进行的品种试验中有223个品种。68个国产品种（28.8%）在抗白粉病性状上表现出异质性，即由不同抗性品系组成。共鉴定出13种已知抗性（Ab、Ar、HH、La、Ly、Mlo、Ri、Ro、Ru、Sp、St、Tu2和We）。160个同质品种中以Mlo抗性最常见（76.6%）。在13个品种中发现了新描述的抗Ro。其他耐药频率较低（最高2.4%）。在16个品种中发现了未知的抗性，其中5个品种对所有常用的病原菌都有效。对未知抗性品种和已登记的异种品种的研究仍在继续。
In 2006-2010, resistance to the powdery mildew pathogen was studied in 277 spring barley cultivars. They were represented by 54 cultivars in Czech official variety trials, of which 42 were foreign, and 223 cultivars in variety trials conducted by domestic breeding companies in that period. Sixty-eight domestic cultivars (28.8%) exhibited heterogeneity in the examined trait, i.e. they were composed of lines with different resistances to powdery mildew. Thirteen known resistances were identified (Ab, Ar, HH, La, Ly, Mlo, Ri, Ro, Ru, Sp, St, Tu2 and We). The most frequent resistance was Mlo detected in 160 homogeneous cultivars (= 76.6%). The newly described resistance Ro was found in 13 cultivars. Frequency of other resistances was low (maximally 2.4%). Unknown resistances were found in 16 cultivars, in five of which they were effective to all used pathotypes of the pathogen. Research on cultivars possessing unknown resistances and registered heterogeneous cultivars continues.