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- Title
Identification by genetic analysis of two races of Erysiphe polygoni DC. causing powdery mildew disease in mungbean.
- Authors
Reddy, K. S.
- Abstract
Powdery mildew disease is one of the important foliar diseases of mungbean. Earlier, resistance sources have been identified and their genetic nature studied, but there is no information on race identification of Erysiphe polygoni so far. Different genotypes having combinations of the host resistance genes Pm1 Pm1 Pm2 Pm2‘TARM-1’, Pm1 Pm1 pm2 pm2 (S-158-16) and pm1 pm1 Pm2 Pm2 (S-2-4-1) and no resistance genes pm1 pm1 pm2 pm2 (TPM-1) were used in the present investigation. The genotypes were screened with four isolates from Akola, Trombay, Jabalpur and Gauribidanur centres in India. The interactions of resistant differentials with the Akola isolate were different from the other three isolates. The inheritance patterns of different resistance genes in various crosses also differed with respect to the Akola isolate. The variation observed in the Akola isolate could be explained as the result of mutation of the dominant avirulence Avr1 Avr1 genes to virulence avr1 avr1 genes corresponding to host resistance Pm1 Pm1genes. Therefore, the Akola isolate is identified as a second race of E. polygoni.
- Subjects
PLANT genetics; POLYGONIA; MUNG bean; MILDEW; FUNGAL diseases of plants; PLANT breeding
- Publication
Plant Breeding, 2007, Vol 126, Issue 6, p603
- ISSN
0179-9541
- Publication type
Article
- DOI
10.1111/j.1439-0523.2007.01403.x