Inheritance of resistance to Ug99 stem rust in wheat cultivar Norin 40 and genetic mapping of Sr42.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Habibollah GhazviniT Fetch

Abstract

Stem rust, caused by Puccinia graminis f. sp. tritici, is a devastating disease of wheat. The emergence of race TTKSK (Ug99) and new variants in Africa threatens wheat production worldwide. The best method of controlling stem rust is to deploy effective resistance genes in wheat cultivars. Few stem rust resistance (Sr) genes derived from the primary gene pool of wheat confer resistance to TTKSK. Norin 40, which carries Sr42, is resistant to TTKSK and variants TTKST and TTTSK. The goal of this study was to elucidate the inheritance of resistance to Ug99 in Norin 40 and map the Sr gene(s). A doubled haploid (DH) population of LMPG-6/Norin 40 was evaluated for resistance to the race TTKST. Segregation of 248 DH lines fitted a 1:1 ratio (χ (2) 1:1= 0.58, p = 0.45), indicating a single gene in Norin 40 conditioned resistance to Ug99. This was confirmed by an independent F(2:3) population also derived from the cross LMPG-6/Norin 40 where a 1:2:1 ratio (χ (2)1:2:1 = 0.69, p = 0.71) was observed following the inoculation with race TTKSK. Mapping with DNA markers located this gene to chromosome 6DS, the known location of Sr42. PCR marker FSD_RSA co-segregated with Sr42, and simple sequence repeat (SSR) marker BARC183 was closely linked ...Continue Reading

References

Oct 19, 2004·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Daryl J SomersKeith Edwards
Aug 1, 1997·Genome Génome / Conseil National De Recherches Canada·J ThomasN Howes
Mar 3, 2010·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Colin W HiebertTaye Zegeye
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Citations

Oct 12, 2012·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Habibollah GhazviniThomas Fetch
Jul 19, 2013·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Eric L OlsonJesse A Poland
Oct 15, 2013·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Eric E Lopez-VeraSukhwinder Singh
Jun 7, 2014·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Long-Xi YuMark E Sorrells
May 20, 2014·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Matthew N RouseJamie D Sherman
Jun 11, 2014·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Matthew N RouseColin W Hiebert
Apr 20, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Mulualem T KassaColin W Hiebert
Dec 20, 2014·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Guotai YuSteven S Xu
Oct 21, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Colin W HiebertTom G Fetch
Sep 2, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Andrew T WiersmaEric L Olson
Dec 18, 2018·Frontiers in Plant Science·Mandeep S RandhawaMaricarmen Sandoval-Sanchez

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