Genome-Wide Association Analysis of Fusarium Head Blight Resistance in Chinese Elite Wheat Lines
文献类型： 外文期刊
作者： Zhu, Zhanwang 1 ; Chen, Ling 1 ; Zhang, Wei 2 ; Yang, Lijun 4 ; Zhu, Weiwei 1 ; Li, Junhui 1 ; Liu, Yike 1 ; Tong, Hanwen 1 ;
作者机构： 1.Hubei Acad Agr Sci, Food Crops Inst, Hubei Key Lab Food Crop Germplasm & Genet Improve, Hubei Engn & Technol Res Ctr,Wheat Wheat Dis Biol, Wuhan, Peoples R China
2.CAAS, Inst Crop Sci, Beijing, Peoples R China
3.North Dakota State Univ, Dept Plant Sci, Fargo, ND 58105 USA
4.Hubei Acad Agr Sci, Inst Plant Protect & Soil Sci, Wuhan, Peoples R China
5.CIMMYT China Off, Beijing, Peoples R China
6.Yangtze Univ, Hubei Collaborat Innovat Ctr Grain Ind, Jingzhou, Peoples R China
关键词： Fusarium graminearum; genome-wide association study; marker-assisted selection; single nucleotide polymorphism; Triticum aestivum
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）
ISSN： 1664-462X
年卷期： 2020 年 11 卷
页码：
收录情况： SCI
摘要： Fusarium head blight (FHB) is a devastating wheat disease worldwide. To decipher the genetic architecture of FHB resistance in Chinese germplasm, a Wheat Association Panel for Scab Research (WAPS) consisting of 240 leading Chinese wheat cultivars and elite lines was genotyped using the 90K single nucleotide polymorphism (SNP) arrays. The FHB response was evaluated in the field nurseries in Wuhan in Hubei Province over four consecutive years from 2014 to 2017. Five quantitative trait loci (QTL) were consistently identified on chromosome arms 1AS, 2DL, 5AS, 5AL, and 7DS using a mixed linear model (MLM), explaining 5.6, 10.3, 5.7, 5.4, and 5.6% of phenotypic variation, respectively. The QTL on 5AS, 5AL, and 7DS QTL are probably novel. The allelic frequency analysis indicated that cultivars from the Middle and Lower Yangtze River Valleys harbored more favorable alleles and were therefore more resistant than those from other regions. To facilitate in-house germplasm screening and marker-assisted selection (MAS), SNP-derived PCR markers were developed for the QTL regions on 1AS, 5AS, and 5AL QTL. In addition to the above five QTL, the WAPS population had a very low frequency of Fhb1, confirming that the gene is not widely used in Chinese wheat breeding programs. The resistant lines and molecular markers developed in this study are resources and information for enhancing FHB resistance in breeding populations by marker-assisted recurrent selection and gene stacking.
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