QTL Mapping for Adult-Plant Resistance to Stripe Rust in a Common Wheat RIL Population Derived from Chuanmai 32/Chuanyu 12
文献类型: 外文期刊
作者: Wu Ling 2 ; Xia Xian-chun 1 ; Zheng You-liang 3 ; Zhang Zheng-yu 5 ; Zhu Hua-zhong 1 ; Liu Yong-jian; Yang En-nian; 1 ;
作者机构: 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.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu 610066, Peoples R China
3.Sichuan Agr Univ, Triticeae Res Inst, Chengdu 611130, Peoples R China
4.Chinese Acad Agr Sci, China Off, Int Maize & Wheat Improvement Ctr CIMMYT, Beijing 100081, Peoples R China
5.Sichuan Acad Agr Sci, Inst Plant Protect, Chengdu 610066, Peoples R China
6.Sichuan Agr Univ, Coll Agr, Chengdu 611130
关键词: APR;Triticum aestivum;microsatellites;quanitative trait locus;yellow rust
期刊名称:JOURNAL OF INTEGRATIVE AGRICULTURE ( 影响因子:2.848; 五年影响因子:2.979 )
ISSN: 2095-3119
年卷期: 2012 年 11 卷 11 期
页码:
收录情况: SCI
摘要: Stripe rust, caused by Puccinia striiformis f. sp. tritici, is a devastating wheat disease worldwide. The Chinese wheat cultivar Chuanmai 32 has shown stable resistance to stripe rust for 10 yr in Sichuan Province, a hotspot for stripe rust epidemics. The objective of the present study was to map quantitative trait loci (QTL) for adult-plant resistance (APR) to stripe rust in a population of 140 recombinant inbred lines (RILs) derived from Chuanmai 32/Chuanyu 12. Field trials were conducted in Chengdu and Yaan, Sichuan, from 2005 to 2008, providing stripe rust reaction data for 6 environments. 797 simple sequence repeat (SSR) markers were screened for association with stripe rust reaction, initially through bulked segregant analysis (BSA). Based on the mean disease values averaged across environments, the broad-sense heritability of maximum disease severity (MDS) was 0.75. Two QTLs for stripe rust resistance were detected by composite interval mapping (CIM). They were designated QYr.caas-3BL and QYr.caas-3BS and explained from 6.6 to 20.1%, respectively, of the phenotypic variance across environments. QYr.caas-3BL came from Chuanmai 32; QYr.caas-3BS with lower effect was from the susceptible parent Chuanyu 12. Both QTLs appear to be new.
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