Mapping of QTL associated with Fusarium head blight in spring wheat RL4137

Mapping of QTL associated with Fusarium head blight in spring wheat RL4137

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Fusarium head blight (FHB) is a destructive disease of wheat worldwide.We aimed to map QTL for FHB resistance in RL4137, a FHB resistant line derived from Frontana using 90 recombinant inbred lines (RIL) from a cross between RL4137 and the moderately FHB resistant variety Timgalen.A total of seven putative FHB resistance QTL (1B, 2B, 3A, 6A, 6B, 7A and 7D) were identified and here in all but one instance, the alleles from RL4137 had a positive effect on FHB resistance.The QTL, Qfhs.

jic-2band Qfhs.jic-6b contributed by the alleles from RL4137 and Timgalen, respectively olea europaea montra were detected in multiple trials.Our study also identified three QTL for plant height (2B, 4A and 5B), two QTL for weight of infected spikelets from infected ears (2B and 6A) and one QTL for "awns" (2B).The QTL mapped on 2B for PH, WIS and awns co-localized with Qfhs.

jic-2b.The FHB QTL on 1B and 6B were not associated with PH QTL and that the minor PH QTL on 4A and 5B, did not co-localise with any other FHB resistance QTL.