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Identification of Genomic Regions Controlling Adult-Plant Stripe Rust Resistance in Chinese Landrace Pingyuan 50 Through Bulked Segregant Analysis

文献类型： 外文期刊

作者： Lan, Caixia 1 ; Liang, Shanshan 1 ; Zhou, Xiangchun 3 ; Zhou, Gang 3 ; Lu, Qinglin 3 ; Xia, Xianchun 1 ; He, Zhonghu 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Natl Wheat Improvement Ctr, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China

2.Victorian AgriBiosci Ctr, Dept Primary Ind, Bundoora, Vic 3083, Australia

3.Gansu Acad Agr Sci, Gansu Wheat Res Inst, Lanzhou 730070, Gansu, Peoples R China

4.Chinese Acad Agr Sci, CIMMYT China Off, Int Maize & Wheat Improvement Ctr CIMMYT, Beijing 100081, Peoples R

期刊名称：PHYTOPATHOLOGY （ 影响因子：4.025； 五年影响因子：4.394 ）

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收录情况： SCI

摘要： Stripe rust, caused by Puccinia striiformis f. sp. tritici, is one of the most widespread and destructive wheat diseases worldwide. Growing resistant cultivars with adult-plant resistance (APR) is an effective approach for the control of the disease. In this study, 540 simple sequence repeat markers were screened to map quantitative trait loci (QTL) for APR to stripe rust in a doubled haploid (DH) population of 137 lines derived from the cross Pingyuan 50 c Mingxian 169. The DH lines were planted in randomized complete blocks with three replicates in Gansu and Sichuan provinces during the 200506, 200607, and 200708 cropping seasons, providing data for four environments. Artificial inoculations were carried out in Gansu and Sichuan with the prevalent Chinese race CYR32. Broad-sense heritability of resistance to stripe rust for maximum disease severity was 0.91, based on the mean value averaged across four environments. Inclusive composite interval mapping detected three QTL for APR to stripe rust on chromosomes 2BS, 5AL, and 6BS, designated QYr.caas-2BS, QYr.caas-5AL, and QYr.caas-6BS, respectively, separately explaining from 4.5 to 19.9% of the phenotypic variation. QYr.caas-5AL, different from QTL previously reported, was flanked by microsatellite markers Xwmc410 and Xbarc261, and accounted for 5.0 to 19.9% of phenotypic variance. Molecular markers closely linked to the QTL could be used in marker-assisted selection for APR to stripe rust in wheat breeding programs.

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