Molecular mapping of quantitative trait loci for adult-plant resistance to powdery mildew in Italian wheat cultivar Libellula

被引：13
作者：
Asad, M. A. [1 ]
Bai, B. [1 ]
Lan, C. X. [1 ]
Yan, J. [2 ]
Xia, X. C. [1 ]
Zhang, Y. [1 ]
He, Z. H. [1 ,3 ]
机构：
[1] Chinese Acad Agr Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Natl Wheat Improvement Ctr, Inst Crop Sci, Beijing 100081, Peoples R China
[2] Chinese Acad Agr Sci, Cotton Res Inst, Anyang 455000, Henan, Peoples R China
[3] CAAS, Int Maize & Wheat Improvement Ctr CIMMYT, China Off, Beijing 100081, Peoples R China
来源：
CROP & PASTURE SCIENCE | 2012年 / 63卷 / 06期
基金：
美国国家科学基金会;
关键词：
Blumeria graminis f. sp tritici; disease resistance; quantitative trait loci; SSR markers; Triticum aestivum L; RUST RESISTANCE; WINTER-WHEAT; STRIPE RUST; DURABLE RESISTANCE; HEXAPLOID WHEAT; MAJOR QTL; LEAF RUST; GENE; LR34/YR18; MAP;
D O I：
10.1071/CP12174
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
Powdery mildew, caused by Blumeria graminis f. sp. tritici (Bgt), is a fungal disease that causes significant yield losses in many wheat-growing regions of the world. Previously, five quantitative trait loci (QTLs) for adult-plant resistance (APR) to stripe rust resistance were identified in Italian wheat cultivar Libellula. The objectives of this study were to map QTLs for APR to powdery mildew in 244 F-2:3 lines of Libellula/Huixianhong, to analyse the stability of detected QTLs across environments, and to assess the association of these QTLs with stripe rust resistance. Powdery mildew response was evaluated for 2 years in Beijing and for 1 year in Anyang. The correlation between averaged maximum disease severity (MDS) and averaged area under disease progress curve (AUDPC) over 2 years in Beijing was 0.98, and heritabilities of MDS and AUDPC were 0.65 and 0.81, respectively, based on the mean values averaged across environments. SSR markers were used to screen the parents and mapping population. Five QTLs were identified by inclusive composite interval mapping, designated as QPm.caas-2DS, QPm.caas-4BL.1, QPm.caas-6BL.1, QPm.caas-6BL.2, and QPm.caas-7DS. Three QTLs (QPm.caas-2DS and QPm.caas-6BL.1, and QPm.caas-6BL.2) seem to be new resistance loci for powdery mildew. QTLs QPm.caas-2DS and QPm.caas-4BL.1 were identified at the same position as previously mapped QTLs for stripe rust resistance in Libellula. The QTL QPm.caas-7DS, derived from Libellula, coincided with the slow rusting and slow mildewing locus Lr34/Yr18/Pm38. These results and the identified markers could be useful for wheat breeders aiming for durable resistance to both powdery mildew and stripe rust.
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收藏
页码：539 / 546
页数：8
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