Identification of QTL for adult-plant resistance to powdery mildew in Chinese wheat landrace Pingyuan 50
Identification of QTL for adult-plant resistance to powdery mildew in Chinese wheat landrace Pingyuan 50
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中国小麦地方品种平原50成株抗白粉病QTL鉴定
DOI：
10.1016/j.cj.2014.04.009
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发表时间：
2014-10-01
期刊：
影响因子：
6.6
通讯作者：
He, Zhonghu
中科院分区：
文献类型：
--
作者：
Asad, Muhammad Azeem;Bai, Bin;He, Zhonghu
小麦白粉病（Blumeria graminis f. sp. tritici）是小麦的主要病害之一。中国小麦地方品种平原50号在田间对白粉病表现出60多年的成株抗性。为了剖析该品种对白粉病抗病性的遗传基础，在北京（2009-2010和2010-2011）和安阳（2009-2010）分别进行了2年和1年的重复田间试验，对137个双单倍体（DH）系进行了定位群体评价。利用540个多态性SSR标记对整个群体进行基因分型，构建连锁图谱并进行QTL分析。3个QTL定位在2BS染色体（QPm）上。caas-2BS。2)、3BS (QPm)；caas-3BS)和5AL （QPm）。caa - 5al)和平原50抗性等位基因分别解释了5.3%、10.2%和9.1%的表型变异，3BL染色体上有1个QTL （QPm）。caas-3BL)来自Mingxian 169，占表型方差的18.1%。女王。caas-3BS,正式任职。caas-3BL和QPm。caas-5AL似乎是白粉病APR的新位点。女王。caas-2BS。下午两点和下午两点。caas-5AL可能是多效性的或与抗条锈病QTL有密切联系的抗性位点。平原50可以作为白粉病和条锈病抗病性改良的潜在遗传资源。(C) 2014中国作物科学学会，中国农业科学院作物科学研究所。Elsevier B.V.版权所有。
Powdery mildew caused by Blumeria graminis f. sp. tritici is one of the major wheat diseases worldwide. The Chinese wheat landrace Pingyuan 50 has shown adult-plant resistance (APR) to powdery mildew in the field for over 60 years. To dissect the genetic basis of APR to powdery mildew in this cultivar, a mapping population of 137 double haploid (DH) lines derived from Pingyuan 50/Mingxian 169 was evaluated in replicated field trials for two years in Beijing (2009-2010 and 2010-2011) and one year in Anyang (2009-2010). A total of 540 polymorphic SSR markers were genotyped on the entire population for construction of a linkage map and QTL analysis. Three QTL weremapped on chromosomes 2BS (QPm. caas-2BS. 2), 3BS (QPm. caas-3BS), and 5AL (QPm. caas-5AL) with the resistance alleles contributed by Pingyuan 50 explaining 5.3%, 10.2%, and 9.1% of the phenotypic variances, respectively, and one QTL on chromosome 3BL (QPm. caas-3BL) derived from Mingxian 169 accounting for 18.1% of the phenotypic variance. QPm. caas-3BS, QPm. caas-3BL, and QPm. caas-5AL appear to be new powdery mildew APR loci. QPm. caas-2BS. 2 and QPm. caas-5AL are possibly pleiotropic or closely linked resistance loci to stripe rust resistance QTL. Pingyuan 50 could be a potential genetic resource to facilitate breeding for improved APR to both powdery mildew and stripe rust. (C) 2014 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. All rights reserved.