QTL mapping of adult‐plant resistance to stripe rust in a ‘Lumai 21 × Jingshuang 16’ wheat population
QTL mapping of adult‐plant resistance to stripe rust in a ‘Lumai 21 × Jingshuang 16’ wheat population
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DOI：
10.1111/pbr.12290
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发表时间：
2015-10
期刊：
影响因子：
2
通讯作者：
Yan Ren;Li Liu;Zhong-hu He;Ling Wu;B. Bai;X. Xia
中科院分区：
文献类型：
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作者：
Yan Ren;Li Liu;Zhong-hu He;Ling Wu;B. Bai;X. Xia
条锈病是由小麦条锈菌（Puccinia striiformis f.）小麦赤霉病（Triticum aestivum L.）国际吧中国小麦品种‘鲁麦21’和‘京双16’在田间表现中等抗条锈性，在不同环境下的平均最大病情（MDS）分别为24 ~ 56.7%和26 ~ 59%。以鲁麦21号×京双16号的199个株系为材料，利用F3群体对小麦条锈病抗性进行QTL定位。在2009-2010年和2010-2011年种植季节，在甘肃省清水市和四川省成都市对F3系进行了MDS评估。根据每个环境的平均MDS值和所有三个环境的平均值，在2B（2个QTL），2DS，4DL和5DS染色体上检测到5个APR QTL。将这些QTL分别命名为QYr.caas-2BS. 2、QYr. caas-2BL. 2、QYr.caas-2DS. 2、QYr.caas-4DL. 2和QYr.caas-5DS。QYr.caas-2DS.2和QYr.caas-5DS在三种环境中都有检测到，分别解释了2.3-18.2%和5.1-18.0%的表型变异。另外，QYr.caas-2BS. 2和QYr.caas-2BL. 2与已报道的抗白粉病QTL共定位。这些APR基因及其连锁的分子标记在小麦抗条锈病和白粉病育种中具有潜在的应用价值。
Stripe rust, caused by Puccinia striiformis f. sp. tritici, is a devastating fungal disease in common wheat (Triticum aestivum L.) worldwide. Chinese wheat cultivars ‘Lumai 21’ and ‘Jingshuang 16’ show moderate levels of adult-plant resistance (APR) to stripe rust in the field, and they showed a mean maximum disease severity (MDS) ranging from 24 to 56.7% and 26 to 59%, respectively, across different environments. The aim of this study was to identify quantitative trait loci (QTL) for resistance to stripe rust in an F3 population of 199 lines derived from ‘Lumai 21’ × ‘Jingshuang 16’. The F3 lines were evaluated for MDS in Qingshui, Gansu province, and Chengdu, Sichuan province, in the 2009–2010 and 2010–2011 cropping seasons. Five QTL for APR were detected on chromosomes 2B (2 QTL), 2DS, 4DL and 5DS based on mean MDS in each environment and averaged values from all three environments. These QTL were designated QYr.caas-2BS.2, QYr.caas-2BL.2, QYr.caas-2DS.2, QYr.caas-4DL.2 and QYr.caas-5DS, respectively. QYr.caas-2DS.2 and QYr.caas-5DS were detected in all three environments, explaining 2.3–18.2% and 5.1–18.0% of the phenotypic variance, respectively. In addition, QYr.caas-2BS.2 and QYr.caas-2BL.2 colocated with QTL for powdery mildew resistance reported in a previous study. These APR genes and their linked molecular markers are potentially useful for improving stripe rust and powdery mildew resistances in wheat breeding.