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Identification of new QTL contributing to barley yellow dwarf virus-PAV (BYDV-PAV) resistance in wheat

Choudhury, S, Hu, H ORCID: 0000-0003-4023-9537, Fan, Y, Larkin, P, Hayden, M, Forrest, K, Birchall, C, Meinke, H ORCID: 0000-0003-2657-3264, Xu, R, Zhu, J and Zhou, M ORCID: 0000-0003-3009-7854 2019 , 'Identification of new QTL contributing to barley yellow dwarf virus-PAV (BYDV-PAV) resistance in wheat' , Plant Disease, vol. 103, no. 11 , pp. 2798-2803 , doi:

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Barley yellow dwarf (BYD) is a major virus disease which dramatically reduces wheat yield. Introducing BYD resistance genes into commercial varieties has been proven to be effective in reducing damage caused by barley yellow dwarf virus (BYDV). However, only one major resistance gene is readily deployable for breeding; Bdv2 derived from Thinopyrum intermedium is deployed as a chromosomal translocation. In this study, a double haploid (DH) population was developed from a cross between XuBYDV (introduced from China showing very good resistance to BYD) and H-120 (a BYD-sensitive Chinese accession), and was used to identify QTL for BYD resistance. The population was genotyped using an Infinium iSelect bead chip array targeting 90K gene-based SNPs. The disease resistance of DH lines inoculated with BYDV was assessed at the heading stage. The infections were assessed by tissue blot immunoassay (TBIA). Three new QTL were identified on chromosomes 5A, 6A, and 7A for both symptom and TBIA, with all three resistance alleles being inherited from XuBYDV. Some DH lines with the resistance alleles from all three QTL showed high level resistance to BYD. These new QTL will be useful in breeding programs for pyramiding BYD resistance genes.

Item Type: Article
Authors/Creators:Choudhury, S and Hu, H and Fan, Y and Larkin, P and Hayden, M and Forrest, K and Birchall, C and Meinke, H and Xu, R and Zhu, J and Zhou, M
Keywords: wheat, barley yellow dwarf virus, quantitative trait loci, symptom score, resistance gene, viruses and viroids, field crops, disease management, cultivar resistance
Journal or Publication Title: Plant Disease
Publisher: Amer Phytopathological Soc
ISSN: 0191-2917
DOI / ID Number:
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© 2019 The American Phytopathological Society

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