The evaluation of FHB resistance QTLs introgressed into elite Canadian spring wheat germplasm |
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Authors: | C A McCartney D J Somers G Fedak R M DePauw J Thomas S L Fox D G Humphreys O Lukow M E Savard B D McCallum J Gilbert W Cao |
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Institution: | (1) Agriculture and Agri-Food Canada, Cereal Research Centre, 195 Dafoe Rd, Winnipeg, MB, Canada, R3T 2M9;(2) Agriculture and Agri-Food Canada, Eastern Cereals and Oilseeds Research Centre, 960 Carling Avenue, Ottawa, ON, Canada, K1A 0C6;(3) Agriculture and Agri-Food Canada, Semiarid Prairie Agricultural Research Centre, 1 Airport Road, P.O. Box 1030, Swift Current, SK, Canada, S9H 3X2 |
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Abstract: | FHB resistance QTL alleles from Nyuubai, Sumai-3, and Wuhan-1 were evaluated for their effect on Fusarium head blight (FHB)
index, Fusarium damaged kernels (FDK), deoxynivalenol (DON) accumulation, plant height, anthesis date, and numerous grain
quality traits in three elite Canadian spring wheat backgrounds. The three FHB resistance parameters were negatively correlated
with plant height in the three populations. The Wuhan-1 4B resistance allele was the most effective resistance allele but
was associated with a 9.3 cm increase in plant height. The Wuhan-1 2D, Nyuubai 3BSc, Sumai-3 3BSc, Nyuubai 5AS, and Sumai-3
5AS alleles were also effective FHB resistance alleles in these populations. The Nyuubai and Sumai-3 3BS alleles were the
least effective of the FHB resistance alleles in the FHB nursery tests. The Sumai-3 5AS resistance allele was significantly
associated with reduced grain protein content, while the same trend was observed for the Nyuubai 5AS resistance allele but
was not significant. FHB resistance tended to increase with more FHB resistance alleles introgressed into the elite genetic
background, which suggested that marker-assisted selection (MAS) will prove useful for improving FHB resistance in Canadian
germplasm. |
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Keywords: | Fusarium graminearum Fusarium head blight Wheat quality Triticum aestivum |
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