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Archives of Phytopathology and Plant Protection (2010) 43, 581-588

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Khalaf Ali Hamam and Kamal A.M. Abo-Elyousr (2010)
Screening of certain barley lines for resistance to root rot disease caused by Fusarium graminearum
Archives of Phytopathology and Plant Protection 43 (6), 581-588
Abstract: This investigation was conducted in 2005/2006 and 2006/2007 to test 235 barley lines plus two varieties Giza 127 and Giza 128 for resistance and susceptibility to Fusarium graminearum. All screened barley lines showed varied significant degrees of infestation to root rot pathogen. A screening system is described for identifying barley lines which are effective in controlling resistant or susceptible lines. By detecting small but consistent differences in root rot severity, the bioassay proved effective in large-scale screening for partial resistance: already 335 barley lines and two varieties have been screened. We found five groups (7.12%), 22 barley lines and both varieties are resistant (R) (8.31%); 28 barley lines are moderately resistant (MR) (19.29%); 65 barley lines are moderately susceptible (MS) (27.89%); 94 barley lines are susceptible (S) and (37.39%) 126 barley lines are highly susceptible (HS). The high degree of precision makes this an invaluable tool in the understanding of pathogen aggressiveness, host specialisation and parasitic fitness. Disease scale was strongly negative and had moderate correlation with germination (-0.309** and -0.649**) under normal and disease treatment. The correlation between yield and normal and disease treatment during two seasons was strong and negative (-0.834** and -0.847**, respectively were detected).
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Kamal A.M. Abo-Elyousr

Research topic(s) for pests/diseases/weeds:
control - general


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Fusarium graminearum Barley (Hordeum vulgare) Egypt