CHARACTRIZATION OF ANASTOMOSIS GROUPS AND EVALUATION OF PATHOGENICTY OF Rhizoctonia solani ISOLATES INVOLVED IN FLAX SEEDLING BLIGHT. | ||
| Journal of Plant Production | ||
| Article 15, Volume 33, Issue 3, March 2008, Pages 1985-1995 PDF (767.41 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2008.135713 | ||
| Authors | ||
| Ola G. El-Hawary1; M. R. Omar1; E. M. Hussein1; A. A. Mosa2; M. H. Mostafa2 | ||
| 1Plant Path. Res. Inst., Agric. Res. Center, Giza, Egypt. | ||
| 2Department of Plant Pathology, Faculty of Agriculture, Ain Shams University, Cairo11241, Egypt. | ||
| Abstract | ||
| orty eight isolates of Rhizoctonia solani were obtained from flax seedlings showed seedling blight. Anastmosis tests revealed that 12 isolates (25%) belonged to AG-2, while 36 isolates (75%) belonged to AG-4. Pathogenicity test on flax cultivar Shkha 1, under greenhouse conditions, showed that the pathogenic isolates in the pre-emergence stage represented 91.67 and 77.72% within AG-2 and AG-4, respectively. However, the pathogenic isolates of AG-4 representing 58.23% of the total isolates as well as the highest percentage of the pathogenic isolates (71.79%). This observations held true in the case of plant height and dry weight. These results indicate that both AGs 2 and 4 are important in the etiology of flax seedling blight. The importance of AG-2 is due to its high virulence, while the importance of AG-4 is due to its high prevalence .Cluster analysis suggested that, within each AG, isolates could be separated into subgroups with specific virulence patterns. | ||
| Keywords | ||
| Rhizoctonia solani; Anastomosis groups; Flax; Pathogenicity | ||
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