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Phytopathological and molecular genetic identification of leaf rust resistance genes in common wheat accessions with alien genetic material

  • Plant Genetics
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Abstract

Leaf rust resistance genes were sought in 23 resistant common wheat accessions with alien genetic material of Aegilops speltoides, Ae. triuncialis, and Triticum kiharae from the Arsenal collection. The genes were identified by common phytopathological tests and PCR analysis with STS markers linked with the known Lr genes. None of the methods identified the resistance genes in two accessions. In the other accessions, the combination of the two methods broadened the spectrum of detectable genes and, in some cases, allowed double verification of the presence of a resistance gene. Most accessions proved to contain several leaf rust resistance genes, combining juvenile and adult plant ones. The accessions were found to contain gene combinations that ensured field resistance (Lr13 + Lr10 and Lr12 + Lr34) and immunity under the conditions of the Non-Chernozem region. Accessions with alien genetic material contained a unique combination of five or six resistance genes. Since the accessions were rich in leaf rust resistance genes, including effective ones, and carried rare combinations of these genes, they were proposed as donors to be universally employed in breeding for immunity in all regions of Russia.

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Correspondence to I. F. Lapochkina.

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Original Russian Text © N.R. Gajnullin, I.F. Lapochkina, A.I. Zhemchuzhina, M.I. Kiseleva, T.M. Kolomiets, E.D. Kovalenko, 2007, published in Genetika, 2007, Vol. 43, No. 8, pp. 1058–1064.

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Gajnullin, N.R., Lapochkina, I.F., Zhemchuzhina, A.I. et al. Phytopathological and molecular genetic identification of leaf rust resistance genes in common wheat accessions with alien genetic material. Russ J Genet 43, 875–881 (2007). https://doi.org/10.1134/S1022795407080078

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  • DOI: https://doi.org/10.1134/S1022795407080078

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