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Life Sciences

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Published yearly: 

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ISSN: 2320-964X (Online) 

ISSN: 2320-7817  (Print)

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ORIGINAL ARTICLE

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Int. Journal of Life Sciences, 2017; 5(2): 189- 197    |    Available online, June 30, 2017

Virulence of wheat leaf rust and reaction of cultivars to virulent races in Tigray, Northern Ethiopia


Tesfay Gebrekirstos1, Getaneh Woldeab2 , Thangavel Selvaraj3 and Arvind Chavhan4*


1Tigray Agricultural Research Institute (TARI), Mekelle Agricultural Research Center P.O. Box 258, Mekelle, Ethiopia.
2Ethiopian Institute of Agricultural Research (EIAR), Ambo Plant Protection Research Center P.O. Box 37, Ambo, Ethiopia. | 3Ambo University P.O. Box 19, Ambo, Ethiopia.
4Digambarrao Bindu College, Bhokar, Nanded, 431801, MS, India, *Corresponding author: myhopera2002@yahoo.com/tesfaygebre2009@gmail.com

Received: 07.03.2017    |     Accepted: 24.05.2017    |      Published :30.06.2017

This study was carried out to determine the virulence of P. triticina and evaluate the reaction of wheat cultivars to virulent races. Race analysis was carried out by inoculating isolates on to the 16 differential hosts. A total of 22 races were identified of which; PHTT, PHRT, THTT and FHRT were predominant races with frequencies of 20, 15, 10 and 10% respectively. The remaining 18 races were confined to specific locations with a frequency of 2.5% each. The broadest virulence spectrum was recorded from TKTT race, making 15 Lr genes ineffective. About 81% of Lr genes were ineffective to 55% of P. triticina isolates. Races TKTT, THTT and PHTT were used to evaluate the resistance of ten wheat cultivars in greenhouse. Bread wheat cultivars, Mekelle-3, Mekelle-4, Picaflor, Dashin and Local cultivar showed susceptible reaction to TKTT, THTT and PHTT races. Unlike bread wheat varieties, durum varieties, Ude and Dembi were resistant to these races. The result of this study showed most bread wheat varieties did not have adequate resistance for leaf rust. Hence, gene pyramiding of Lr9, Lr24 and Lr2a has paramount importance as the additive effects of several genes offer the variety a wider base for leaf rust resistance. Key words: Race, Puccinia triticina, Lr genes and differential hosts

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Editor: Dr. R.G. Jadhao

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Cite this article as:

Tesfay Gebrekirstos, Getaneh Woldeab, Thangavel Selvaraj and Arvind Chavhan (2017) Virulence of wheat leaf rust and reaction of cultivars to virulent races in Tigray, Northern Ethiopia, International J. of Life Sciences, 5 (2): 189-197.

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Acknowledgement:

The author gratefully acknowledges Dr. Getaneh Woldeab for his technical support. The East African Agricultural Productivity Project and Tigray Agricultural Research Institute are acknowledged for providing full financial support to the first author.

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Conflicts of interest: The authors stated that no conflicts of interest.

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Copyright: © 2017 | Author(s), This is an open access article under the terms of the Creative Commons Attribution-Non-Commercial - No Derivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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