FREQUENCY OF VERULENCE AND VIRULENCE FORMULA OF WHEAT STEM RUST RACES IDENTIFIED IN EGYPT DURING 2008/09 - 2009/010.
Faizallah, E., Youseef, W., El Sayed, O. (2011). FREQUENCY OF VERULENCE AND VIRULENCE FORMULA OF WHEAT STEM RUST RACES IDENTIFIED IN EGYPT DURING 2008/09 - 2009/010.. EKB Journal Management System, 2(1), 49-58. doi: 10.21608/jppp.2011.84654
E. A. Faizallah; W. A. Youseef; O. A. El Sayed. "FREQUENCY OF VERULENCE AND VIRULENCE FORMULA OF WHEAT STEM RUST RACES IDENTIFIED IN EGYPT DURING 2008/09 - 2009/010.". EKB Journal Management System, 2, 1, 2011, 49-58. doi: 10.21608/jppp.2011.84654
Faizallah, E., Youseef, W., El Sayed, O. (2011). 'FREQUENCY OF VERULENCE AND VIRULENCE FORMULA OF WHEAT STEM RUST RACES IDENTIFIED IN EGYPT DURING 2008/09 - 2009/010.', EKB Journal Management System, 2(1), pp. 49-58. doi: 10.21608/jppp.2011.84654
Faizallah, E., Youseef, W., El Sayed, O. FREQUENCY OF VERULENCE AND VIRULENCE FORMULA OF WHEAT STEM RUST RACES IDENTIFIED IN EGYPT DURING 2008/09 - 2009/010.. EKB Journal Management System, 2011; 2(1): 49-58. doi: 10.21608/jppp.2011.84654

FREQUENCY OF VERULENCE AND VIRULENCE FORMULA OF WHEAT STEM RUST RACES IDENTIFIED IN EGYPT DURING 2008/09 - 2009/010.

Journal of Plant Protection and Pathology
Article 6, Volume 2, Issue 1, January 2011, Page 49-58  XML PDF (362.23 K)
Document Type: Original Article
DOI: 10.21608/jppp.2011.84654
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Authors
E. A. Faizallah1; W. A. Youseef2; O. A. El Sayed2
1Plant Pathology Dept., Fac. of Agriculture, Mansoura Univ., Egypt
2Institute of Plant Pathology, ARC., Giza, Egypt .
Abstract
Wheat stem rust is one of the major diseases on wheat in Egypt which appears annually in virulence of different frequencies. In this investigation, stem rust samples were collected from different locations of lower Egypt during two seasons (2008/09-2009/010). Three single pustules method of isolation was followed for each sample. Rust data were recorded as infection types, and virulence frequencies were determined against 35 Sr genes, in monogenic lines and some Egyptian genotypes. Virulence frequencies were very high against Sr21 +9g, Sr 7a, Sr 16, Sr 9e, Sr 6 and Sr 17, while the lowest frequencies were recorded against Sr 31, Sr 29 and Sr30. The physiologic races were identified according to their reaction on the 20 Sr,s were recorded for each race. Thirteen and two physiologic races of Puccinia garminis were dantefiand. Race group TT- was the most frequent (16.16 %) , race group TS- (11.76%) ,race group KT- and TK- ( 5.88 %) followed by race group BB-, DH, PR, and SR (2.94% ). The least ones in the regard were races of group BC, BH<BK,DG,DF and DT (0.98%) keywords: Wheat stem rust race  and virulence .  
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