VIRULENCE STRUCTURE OF ERYSIPHE GRAMINIS TRITlCI IN HIMACHAL PRADESH
167
Authors
-
T. R. SHARMA AND B. M. SINGH
Department of Mycology and Plant Pathology, H. P. Krishi Vishuauidyalaya, Palampur 176 062
Keywords:
Virulence structure, Erysiphe graminis tritici, WheatAbstract
The virulence structure of Erysiphe graminis tritici population in several areas of Himachal Pradesh was studied using mobile nurseries of wheat lines carrying single genes for powdery mildew resistance. No virulence was trapped on resistance genes Pm2, Pm4 and Pm6. However, virulence on resistance gene MA (Michigan Amber x Cc8) was quite common in all the areas. Collectively, the powdery mildew population from different areas of Himachal Pradesh is virulent on all Pm genes used in the study. The analysis showed that several combinations of resistance genes like Pml and Pm2, Pml and Pm6, Pm2 and Pm4,. Pm2 and PmB, Pm4 and PmB, Pm4 and Pm6 and Pm7 and PmB could confer complete resistance against all the prevalent virulences. There was no definite pattern in the changes in virulence frequency at different sampling places or times.
Issue
Section
License
For Authors
As soon as an article is accepted for publication, authors are requested to assign copyright of the article (or to grant exclusive publication and dissemination rights) to the publisher (Indian Phytopathlogical Society). This will ensure the widest possible protection and dissemination of information.
For Readers
While the advice and information in this journal is believed to be true and accurate at the date of its publication, the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may have been made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
All articles published in this journal are protected by copyright, which covers the exclusive rights to reproduce and distribute the article (e.g., as offprints), as well as all translation rights. No material published in this journal may be reproduced photographically or stored on microfilm, in electronic data bases, on video disks, etc., without first obtaining written permission from the publisher. The use of general descriptive names, trade names, trademarks, etc. in this publication, even if not specifically identified, implies that these names are protected by the relevant laws and regulations.