Genome-wide association mapping revealed syntenic loci QFhb-4AL and QFhb-5DL for Fusarium head blight resistance in common wheat (Triticum aestivum L.)
| Autor: | Hongya Wu, Derong Gao, Yong Zhang, Liu Jian, Lu Chengbin, Hu Wenjing, Chunmei Zhang, Zhengning Jiang, Dongsheng Li, Wang Junchan, Yeyu Liu |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Germplasm Triticum aestivum L Single-nucleotide polymorphism Genome-wide association study Plant Science Biology 01 natural sciences Synteny Chromosomes Plant 03 medical and health sciences Fusarium Single nucleotide polymorphism (SNP) lcsh:Botany SNP Common wheat Triticum Disease Resistance Plant Diseases Genetics Genome-wide association study (GWAS) Chromosome Mapping food and beverages biology.organism_classification SNP genotyping lcsh:QK1-989 030104 developmental biology Wheat mosaic virus Fusarium head blight (FHB) mixed linear model (MLM) 010606 plant biology & botany Genome-Wide Association Study Research Article |
| Zdroj: | BMC Plant Biology BMC Plant Biology, Vol 20, Iss 1, Pp 1-13 (2020) |
| DOI: | 10.21203/rs.2.12667/v4 |
| Popis: | Background Fusarium head blight (FHB), primarily caused by Fusarium graminearum, is a major threat to wheat production and food security worldwide. Breeding stably and durably resistant cultivars is the most effective approach for managing and controlling the disease. The success of FHB resistance breeding relies on identification of an effective resistant germplasm. We conducted a genome-wide association study (GWAS) using the high-density wheat 90 K single nucleotide polymorphism (SNP) assays to better understand the genetic basis of FHB resistance in natural population and identify associated molecular markers. Results The resistance to FHB fungal spread along the rachis (Type II resistance) was evaluated on 171 wheat cultivars in the 2016–2017 (abbr. as 2017) and 2017–2018 (abbr. as 2018) growing seasons. Using Illumina Infinum iSelect 90 K SNP genotyping data, a genome-wide association study (GWAS) identified 26 loci (88 marker-trait associations), which explained 6.65–14.18% of the phenotypic variances. The associated loci distributed across all chromosomes except 2D, 6A, 6D and 7D, with those on chromosomes 1B, 4A, 5D and 7A being detected in both years. New loci for Type II resistance were found on syntenic genomic regions of chromsome 4AL (QFhb-4AL, 621.85–622.24 Mb) and chromosome 5DL (QFhb-5DL, 546.09–547.27 Mb) which showed high collinearity in gene content and order. SNP markers wsnp_JD_c4438_5568170 and wsnp_CAP11_c209_198467 of 5D, reported previously linked to a soil-borne wheat mosaic virus (SBWMV) resistance gene, were also associated with FHB resistance in this study. Conclusion The syntenic FHB resistant loci and associated SNP markers identified in this study are valuable for FHB resistance breeding via marker-assisted selection. |
| Databáze: | OpenAIRE |
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