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Association analysis of resistance to cereal cyst nematodes (Heterodera avenae) and root lesion nematodes (Pratylenchus neglectus and P. thornei) in CIMMYT advanced spring wheat lines for semi-arid conditions

Author: Dababat, A.A.
Author: Gomez-Becerra, H.F.
Author: Erginbas-Orakci, G.
Author: Dreisigacker, S.
Author: Imren, M.
Author: Toktay, H.
Author: Elekcioglu, I.H.
Author: Tesfamariam Mekete
Author: Nicol, J.M.
Author: Ansari, O.
Author: Ogbonnaya, F.C.
Year: 2016
ISSN: 1344-7610
ISSN: 1347-3735
Abstract: To identify loci linked to nematode resistance genes, a total of 126 of CIMMYT advanced spring wheat lines adapted to semi-arid conditions were screened for resistance to Heterodera avenae, Pratylenchus neglectus, and P. thornei, of which 107 lines were genotyped with 1,310 DArT. Association of DArT markers with nematode response was analyzed using the general linear model. Results showed that 11 markers were associated with resistance to H. avenae (pathotype Ha21), 25 markers with resistance to P. neglectus, and 9 significant markers were identified to be linked with resistance to P. thornei. In this work we confirmed that chromosome 4A (~90–105 cM) can be a source of resistance to P. thornei as has been recently reported. Other significant markers were also identified on chromosomal regions where no resistant genes have been reported for both nematodes species. These novel QTL were mapped to chromosomes 5A, 6A, and 7A for H. avenae; on chromosomes 1A, 1B, 3A, 3B, 6B, 7AS, and 7D for P. neglectus; and on chromosomes 1D, 2A, and 5B for P. thornei and represent potentially new loci linked to resistance that may be useful for selecting parents and deploying resistance into elite germplasm adapted to regions where nematodes are causing problem.
Format: PDF
Language: English
Publisher: Japanese Society of Breeding
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
Type: Article
Place of Publication: Tokyo, Japan
Pages: 692-702
Issue: 5
Volume: 66
DOI: 10.1270/jsbbs.15158
Keywords: Association Mapping
Keywords: Bread Wheat
Keywords: DArT
Keywords: Cereal Cyst Nematodes
Keywords: Root Lesion Nematode
Keywords: QTL
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Journal: Breeding Science

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  • Wheat
    Wheat - breeding, phytopathology, physiology, quality, biotech

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