Mapping of Major Fusarium Head Blight Resistance from Canadian Wheat cv. AAC Tenacious
by
Raman Dhariwal 1
, 
Maria A. Henriquez 2, Colin Hiebert 2, Curt A. McCartney 2 and 
Harpinder S. Randhawa 1,*
Raman Dhariwal 1, Maria A. Henriquez 2, Colin Hiebert 2, Curt A. McCartney 2 and Harpinder S. Randhawa 1,*
1
Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada
2
Agriculture and Agri-Food Canada, Morden Research and Development Centre, Morden, MB R6M 1Y5, Canada
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2020, 21(12), 4497; https://doi.org/10.3390/ijms21124497
Received: 17 April 2020 / Revised: 18 June 2020 / Accepted: 22 June 2020 / Published: 24 June 2020
(This article belongs to the Section Molecular Plant Sciences)
Fusarium head blight (FHB) is one of the most devastating wheat disease due to its direct detrimental effects on grain-yield, quality and marketability. Resistant cultivars offer the most effective approach to manage FHB; however, the lack of different resistance resources is still a major bottleneck for wheat breeding programs. To identify and dissect FHB resistance, a doubled haploid wheat population produced from the Canadian spring wheat cvs AAC Innova and AAC Tenacious was phenotyped for FHB response variables incidence and severity, visual rating index (VRI), deoxynivalenol (DON) content, and agronomic traits days to anthesis (DTA) and plant height (PHT), followed by single nucleotide polymorphism (SNP) and simple sequence repeat (SSR) marker genotyping. A high-density map was constructed consisting of 10,328 markers, mapped on all 21 chromosomes with a map density of 0.35 cM/marker. Together, two major quantitative trait loci for FHB resistance were identified on chromosome 2D from AAC Tenacious; one of these loci on 2DS also colocated with loci for DTA and PHT. Another major locus for PHT, which cosegregates with locus for low DON, was also identified along with many minor and epistatic loci. QTL identified from AAC Tenacious may be useful to pyramid FHB resistance.
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Keywords:
QTL mapping; doubled haploid; disease resistance; Fusarium head blight; plant height; days to anthesis; epistasis
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MDPI and ACS Style
Dhariwal, R.; Henriquez, M.A.; Hiebert, C.; McCartney, C.A.; Randhawa, H.S. Mapping of Major Fusarium Head Blight Resistance from Canadian Wheat cv. AAC Tenacious. Int. J. Mol. Sci. 2020, 21, 4497.
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