|LI, TAO - Kansas State University
|WU, SHUANGYE - Kansas State University
|GU, SHILIANG - Yangzhou University
Submitted to: Euphytica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/23/2012
Publication Date: 2/5/2012
Citation: Li, T., Bai, G., Wu, S., Gu, S. 2012. Quantitative trait loci for resistance to Fusarium head blight in the Chinese wheat landrace Huangfangzhu. Euphytica. doi 10.1007/s10681-012-0631-2.
Interpretive Summary: Fusarium head blight (FHB) is a destructive disease of wheat worldwide. The Chinese wheat landrace Huangfangzhu (HFZ) has a high level of resistance to FHB. An experiment was conducted to identify chromosomal regions that are responsible for FHB resistance in HFZ. Two quantitative trait loci (QTL) with major effects were identified in HFZ. One QTL with a large effect was located on the short arm of chromosome 3B and the other was assigned to the long arm of chromosome 7A. In addition, three QTL with small effects on FHB resistance were identified on chromosomes 1AS, 1B and 5AS of HFZ. HFZ carries several QTL for resistance and is a promising source for improving wheat FHB resistance.
Technical Abstract: The Chinese wheat landrace Huangfangzhu (HFZ) has a high level of resistance to Fusarium head blight (FHB). To identify chromosomal regions that are responsible for FHB resistance in HFZ, F8 recombinant inbred lines (RIL) were developed from a cross between HFZ and Wheaton, a U.S. hard spring wheat. FHB was evaluated by single floret inoculation in both greenhouse and field environments. Two quantitative trait loci (QTL) with major effects were identified. One QTL was located on the short arm of chromosome 3B, and explained 35.4% of the phenotypic variation; the other QTL was assigned to 7AL and explained 18.0% of the phenotypic variation for FHB response. In addition, three minor QTL were detected on chromosomes 1AS, 1B and 5AS by single marker regression. HFZ contributed all favorable alleles. The RIL with HFZ alleles at the QTL on 3BS and 7AL displayed significantly lower percentages of infected spikelets than RIL without these alleles in both greenhouse and field environments. HFZ combined several alleles from germplasm reported previously and is a promising alternative source for improving wheat FHB resistance.