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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

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info:eu-repo/semantics/openAccess

Date

2016

Author

Dababat, Abdelfattah A.
Ferney, Gomez-Becerra Hugo
Erginbas-Orakci, Gul
Dreisigacker, Susanne
Imren, Mustafa
Toktay, Halil
Ogbonnaya, Francis

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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 (similar to 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.

Source

BREEDING SCIENCE

Volume

66

Issue

5

URI

https://dx.doi.org/10.1270/jsbbs.15158
https://hdl.handle.net/11480/3536

Collections

  • Makale Koleksiyonu [2]
  • Makale Koleksiyonu [2055]
  • Öksüz Yayınlar Koleksiyonu - Scopus [2338]



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