Stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most destructive diseases of wheat in the world. Genetic resistance is the best strategy for control of the disease. Spring wheat landrace PI 181410 has shown high level resistance to stripe rust. The present study characterized the landrace to have both race-specific all-stage resistance and nonrace-specific high-temperature adult-plant (HTAP) resistance. To map quantitative trait loci (QTL) for the resistance in PI 181410, it was crossed with Avocet S (AvS), from which a recombinant inbred line population was developed. The F5-F8 populations were consecutively phenotyped for stripe rust response in multiple field environments under natural Pst infection, and the F7 population was phenotyped in seedlings at low temperature and in adult-plant stage with selected Pst races in the greenhouse. The F7 population was genotyped using the 90K wheat SNP chip. Three QTL, QYrPI181410.wgp-4AS, QYrPI181410.wgp-4BL, and QYrPI181410.wgp-5BL.1, from PI 181410 for all-stage resistance, were mapped on chromosome arms 4AS, 4BL, and 5BL, respectively. Four QTL, QYrPI181410.wgp-1BL, QYrPI181410.wgp-4BL, QYrPI181410.wgp-5AS, and QYrPI181410.wgp-5BL.2, were identified from PI 181410 for HTAP resistance and mapped to 1BL, 4BL, 5AS, and 5BL, respectively. Two QTL with minor effects on stripe rust response were identified from AvS and mapped to 2BS and 2BL. Four of the QTL from PI 181410 and one from AvS were potentially new. As the 4BL QTL was most effective and likely a new gene for stripe rust resistance, three kompetitive allele specific PCR (KASP) markers were developed for incorporating this gene into new wheat cultivars.

译文

:条锈病,由条锈菌引起。 sp。小麦(Pst)是世界上最具破坏力的小麦疾病之一。遗传抗性是控制该疾病的最佳策略。春季小麦地方品种PI 181410对条纹锈病表现出较高的抵抗力。本研究的特征是长白猪同时具有种族特有的全阶段抗性和非种族特有的高温成年植物(HTAP)抗性。为了绘制PI 181410中抗药性的数量性状基因座(QTL),将其与Avocet S(AvS)杂交,从中开发了重组自交系种群。在自然Pst感染下的多个田间环境中,对F5-F8种群进行表型锈锈反应的连续表型分析,并在温室中选定Pst种族的低温和成年植物苗期对F7种群进行表型分析。使用90K小麦SNP芯片对F7种群进行基因分型。来自PI 181410的三个QTL QYrPI181410.wgp-4AS,QYrPI181410.wgp-4BL和QYrPI181410.wgp-5BL.1分别针对染色体4AS,4BL和5BL进行了全阶段抗性分析。从PI 181410中识别出四个具有HTAP抗性的QTL,QYrPI181410.wgp-1BL,QYrPI181410.wgp-4BL,QYrPI181410.wgp-5AS和QYrPI181410.wgp-5BL.2,并映射到1BL,4BL,5AS和5BL,分别。从AvS中识别出两个对条锈反应有轻微影响的QTL,并将其映射到2BS和2BL。 PI 181410中的四个QTL和AvS中的一个QTL可能是新的。由于4BL QTL最有效,并且可能是抗条纹锈病的新基因,因此开发了三种竞争性等位基因特异性PCR(KASP)标记,将该基因整合到新的小麦品种中。

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