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Quantitative Trait Loci Controlling Fusarium Head Blight Resistance and Low Deoxynivalenol Content in Hexaploid Wheat Population from ‘Arina’ and NK93604

^a Africa Rice Center (WARDA), 01 BP 2031, Cotonou, Benin
^b Dep. of Plant and Environmental Sciences, Norwegian Univ. of Life Sciences, P.O. Box 5003, N-1432, Ås, Norway

View larger version (63K): [in this window] [in a new window]   Fig. 1. Frequency distribution of (a) three year averages for Fusarium head blight (FHB) severity, and (b) deoxynivalenol (DON) content for 93 DH lines derived from a cross between Arina and NK93604. FHB was scored on a liner scale from 0 to 4 (0 = no symptoms visible, 4 = 100% spikelets and spike are bleached). Arrows indicate the values of the parental lines.

View larger version (157K): [in this window] [in a new window]   Fig. 2. LOD score scan of QTLs based on 3 yr means for Fusarium head blight (FHB) resistance (solid line) and DON content (dashed line). LOD scores were obtained using composite interval mapping with an F-to-enter value of 10. QTL graphs and a threshold of LOD 3.0 are shown on the right of each chromosome. Genetic distances are shown in centimorgans on the left of each chromosome. The flanking markers for FHB resistance and DON content are shown in bold face.