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Mapping of quantitative trait loci for adult plant resistance to stripe rust in German wheat cultivar Ibis

Author: Bai Bin
Author: Ren Yan
Author: Xia Xian-Chun
Author: Du Jiu-yuan
Author: Gang Zhou
Author: Wu Ling
Author: Zhu Hua-zhong
Author: He, Zhonghu
Author: Wang Cheng-she
Year: 2012
ISSN: 2095-3119
Abstract: The German wheat cultivar Ibis has excellent adult plant resistance (APR) to stripe rust in Gansu, a hotspot for stripe rust in China. To elucidate the genetic basis of APR to stripe rust in Ibis, 237 F3 lines derived from the cross Ibis/Huixianhong were evaluated at Tianshui, Gansu, in the 2008?2009 and 2009?2010 cropping seasons, and at Chengdu, Sichuan Province, China, in the 2009?2010 cropping season. Inoculations were conducted with a mixture of several prevalent Pst races in both locations. Maximum disease severity (MDS) data showed a continuous distribution of response, indicating quantitative nature of resistance to stripe rust in Ibis. The broad-sense heritability of MDS was 0.75 based on the mean values averaged across three environments. A total of 723 simple sequence repeat (SSR) markers were used to map the QTL for APR by inclusive composite interval mapping (ICIM). QTLs mapping to chromosomes 2BS and 6BS, designated as QYr.caas-2BS.1 and QYr.caas-6BS.1, respectively, explained 4.1?40.7% of the phenotypic variance in MDS across environments. The major effect QTL QYr.caas-2BS.1, flanked by Xgwm148 and Xwmc360, was consistently detected at all three sites as well as the averaged data over three environments, accounting for 40.7, 24.2, 5.2 and 29.9% of phenotypic variance, respectively. The molecular markers closely linked to this QTL have potential for use in marker-assisted selection and gene pyramiding to improve the durability of stripe rust resistance in wheat breeding.
Format: PDF
Language: English
Publisher: Elsevier
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Type: Article
Region: Global
Pages: 528-536
Issue: 4
Volume: 11
DOI: 10.1016/S2095-3119(12)60039-2
Keywords: APR
Keywords: Simple Sequence Repeat Markers
Publisher URI:
Journal: Journal of Integrative Agriculture

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This item appears in the following Collection(s)

  • Genetic Resources
    Genetic Resources including germplasm collections, wild relatives, genotyping, genomics, and IP
  • Wheat
    Wheat - breeding, phytopathology, physiology, quality, biotech

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