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RESEARCH ARTICLE

Pathotypic evolution in Puccinia striiformis in India during 1995–2004

M. Prashar A B , S. C. Bhardwaj A , S. K. Jain A and D. Datta A
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A Directorate of Wheat Research Regional Station, Flowerdale, Shimla – 171 002, Himachal Pradesh, India.

B Corresponding author. Email: mohinder.prashar@gmail.com

Australian Journal of Agricultural Research 58(6) 602-604 https://doi.org/10.1071/AR07126
Submitted: 26 March 2007  Accepted: 23 May 2007   Published: 26 June 2007

Abstract

Yellow rust pathogen (Puccinia striiformis) distribution was monitored in different wheat-production zones (north-western plains zone, north hills zone, and south hills zone) of India during the last decade (1994–2004). Studies indicated the predominance of 3 pathotypes: 46S102 (46E149), 47S103 (47E148), and 46S119 (46E149+Yr9) in the north-western plains zone. These pathotypes were detected for the first time in 1995–96 and are evolving frequently. Another pathotype (78S84), although present in low frequency, was first detected from northern India and is virulent on Yr9 and Yr27, posing a major threat to cv. PBW343, which carries these genes. The high altitudes of the northern hills where very primitive wheat cultivars are grown showed less variability for the yellow rust pathogen. Continued breeding efforts and replacement of cultivars have resulted in low specialisation in the yellow rust pathogen in the south hills zone and pathotype 38S102 predominated in this area during the last decade.

Additional keywords: yellow rust, survey, virulence, wheat.


Acknowledgment

The authors are grateful to the Project Director for his valuable guidance, encouragement, and for providing necessary facilities.


References


McDonald DB, McIntosh RA, Wellings CR, Singh RP, Nelson JC (2004) Genetical studies in wheat XIX. Location and linkage studies on gene Yr27 for resistance to stripe (Yellow) rust. Euphytica 136, 239–248.
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Nayar SK , Prashar M , Bhardwaj SC (1997) Manual of current techniques in wheat rust. Research Bulletin 2, Regional Station, Directorate of Wheat Research, Flowerdale, Shimla, Himachal Pradesh, India. pp. 1–32.

Prashar M, Nayar SK, Bhardwaj SC, Bhatnagar R (1999) Pathotype distribution of Puccinia striiformis West. in India during 1993–94. Indian Journal of Mycology and Plant Pathology 29, 244–247. open url image1