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- W1989432694 abstract "Triticum turgidum L var. durum is known to be particularly susceptible to infection by Fusarium graminearum, the causal agent for Fusarium head blight (FHB), which results in severe yield losses and grain contaminated with mycotoxins. This research was aimed at identifying FHB resistance in tetraploid wheat and mapping the location of FHB resistance genes. A tetraploid cross of durum wheat (‘Strongfield’) × Triticum carthlicum (‘Blackbird’) was used to generate a doubled-haploid (DH) population. This population was evaluated for type II resistance to F. graminearum in replicated greenhouse trials, in which heads were innoculated and the percent of infected spikelets was determined 21 days later. The population was also genotyped with microsatellite markers to construct a map of 424 loci, covering 2 052 cM. The FHB reaction and genotypic data were used to identify FHB resistance quantitative trait loci (QTLs). It was determined that 2 intervals on chromosomes 2BL and 6BS controlled FHB resistance in this tetraploid cross. The FHB resistance allele on chromosome 2BL (r 2 = 0.26, logarithm of odds (LOD) = 8.5) was derived from ‘Strongfield’, and the FHB resistance allele on chromosome 6BS (r 2 = 0.23, LOD = 6.6) was derived from ‘Blackbird’. Two other loci, on chromosomes 5AS and 2AL, were shown to regulate FHB infection and to have an epistatic effect on the FHB resistance QTL on chromosome 6BS. Further, the FHB resistance QTL peak on chromosome 6BS was clearly coincident with the known FHB resistance gene Fhb2, derived from Sumai 3. The results show that FHB resistance can be expressed in durum wheat, and that T. carthlicum and Triticum aestivum likely share a common FHB resistance gene on chromosome 6BS." @default.
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- W1989432694 date "2006-12-01" @default.
- W1989432694 modified "2023-10-15" @default.
- W1989432694 title "Mapping of FHB resistance QTLs in tetraploid wheat" @default.
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- W1989432694 doi "https://doi.org/10.1139/g06-127" @default.
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