alexa Virulence Spectrum of Wheat Stem Rust (Puccinia graminis f.sp.tritici) in the Eastern Showa of Central Ethiopia | OMICS International
ISSN: 2329-8863

Advances in Crop Science and Technology
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Special Issue Article

Virulence Spectrum of Wheat Stem Rust (Puccinia graminis f.sp.tritici) in the Eastern Showa of Central Ethiopia

Abiyot Lemma1, Getaneh Woldeab2 and Yared Semahegn3
1EIAR, Worer Agricultural Research Center, P.O. Box 2003, Addis Ababa, Ethiopia
2EIAR, Ambo Plant Protection Research Center, P.O. Box 37, Ambo, Ethiopia
3EIAR, Holetta Agricultural Research Center, P.O. Box 2003, Addis Ababa, Ethiopia
Corresponding Author : Abiyot Lemma
EIAR, Worer Agricultural Research
Center, P.O. Box 2003, Addis Ababa, Ethiopia
Tel: +251-911332353
E-mail: [email protected]
Received October 23, 2014; Accepted May 22, 2015; Published May 25, 2015
Citation: Lemma A, Woldeab G, Semahegn Y (2015) Virulence Spectrum of Wheat Stem Rust (Puccinia graminis f.sp.tritici) in the Eastern Showa of Central Ethiopia. Adv Crop Sci Tech S1:008. doi: 10.4172/2329-8863.1000S1-008
Copyright: © 2015 Lemma A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Wheat stem rust caused by Puccinia graminis f.sp. tritici is amongst the biotic factors which causes up to 100% yield loss during epidemic years. Ethiopia is considered as a hot spot area for the development of stem rust complex; and hence, this study was carried out to investigate the distribution and intensity of wheat stem rust, and to detect the virulence spectrum of P. graminis f.sp. tritici. The survey result showed that 30 (38.9%) of the fields were affected with stem rust. The overall incidence of the disease was 5.2% and the mean severity of the disease was below 5%. The lowest incidences and severity were noted at Gimbichu while the highest were at Adeaa District. P. graminis f. sp. tritici variability study was resulted in the identification of 16 races of which race SRKSF was the most prevalent with a frequency of 14.3% followed by the races such as TTKSK and TTTTF with frequencies of 7.1% and 3.6%, respectively. Differential host carrying Sr24 was effective to all races considered, while gene Sr36 gene was resistant
to 85.7% of the races. These two genes could be used in resistance breeding program of wheat.

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