A major QTL for resistance against Fusarium head blight in European winter wheat
A major QTL for resistance against Fusarium head blight in European winter wheat
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DOI：
10.1007/s00122-009-1041-2
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发表时间：
2009-07-01
影响因子：
5.4
通讯作者：
Hartl, Lorenz
中科院分区：
文献类型：
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作者：
Haeberle, Jennifer;Holzapfel, Josef;Hartl, Lorenz
我们报告的验证的抗性数量性状基因座（QTL）染色体1BL（现在指定Qfhs.lfl-1BL），这是以前已确定的冬小麦品种Cansas。为了更精确地估计QTL效应及其对株高和抽穗期的影响，建立了具有更均一遗传背景的品系，并在4种环境下喷雾接种黄色镰刀菌后进行了评价。相对于没有抗性等位基因的品系，Qfhs.lfl-1BL使FHB严重程度降低42%。该QTL不影响株高，但显著延迟抽穗期1天。验证群体中所有抗病基因型均携带该主效QTL，显示了其在抗病性中的重要性。该抗性QTL不仅在Cansas品种中发现，而且在Biscay、History和Pirat三个欧洲冬小麦品种中也发现。随后的荟萃分析证实了一个单一的QTL的染色体1B长臂上的起源于上述四个品种的存在。总的来说，本研究的结果表明，Qfhs.lfl-1BL是欧洲冬小麦赤霉病抗性的重要组成部分，并支持这一QTL将是有效的和有价值的回交育种计划的观点。
We report on the verification of a resistance quantitative trait locus (QTL) on chromosome 1BL (now designated Qfhs.lfl-1BL) which had been previously identified in the winter wheat cultivar Cansas. For a more precise estimation of the QTL effect and its influence on plant height and heading date lines with a more homogeneous genetic background were created and evaluated in four environments after spray inoculation with Fusarium culmorum. Qfhs.lfl-1BL reduced FHB severity by 42% relative to lines without the resistance allele. This QTL did not influence plant height, but significantly delayed heading date by one day. All of the most resistant genotypes of the verification population carried this major QTL displaying its importance for disease resistance. This resistance QTL has not only been found in the cultivar Cansas, but also in the three European winter wheat cultivars Biscay, History and Pirat. A subsequent meta-analysis confirmed the presence of a single QTL on the long arm of chromosome 1B originating from the four mentioned cultivars. Altogether, the results of the present study indicate that Qfhs.lfl-1BL is an important component of FHB resistance in European winter wheat and support the view that this QTL would be effective and valuable in backcross breeding programmes.