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Variation in the resistance of barley cultivars and in the pathogenicity of Drechslera teres f. sp. maculata and D. teres f. sp.
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Isolates of
Drechslera teres
that cause net or spot‐type symptoms on barley (
Hordeum vulgare
) were collected in 1986 and 1987 from fields in different regions of France. Variations in pathogenicity were evaluated using 12 barley cultivars. The Middle‐Eastern cultivars Arrivate and 79‐S10‐10 were resistant to all isolates except R5 and S5. The Ethiopian cultivar C1 5791, previously reported to be resistant, was susceptible to the R5 and S5 biotypes. There was a high correlation coefficient between the classification of cultivars for resistance to
D. teres
f. sp.
teres
and
D. teres
f. sp.
maculata.
A method for conserving the virulence of the isolates on straw is evaluated. The virulence level of the isolates was the same after 4 years of storage using this method.
Title: Variation in the resistance of barley cultivars and in the pathogenicity of
Drechslera teres
f. sp.
maculata
and
D. teres
f. sp.
Description:
Isolates of
Drechslera teres
that cause net or spot‐type symptoms on barley (
Hordeum vulgare
) were collected in 1986 and 1987 from fields in different regions of France.
Variations in pathogenicity were evaluated using 12 barley cultivars.
The Middle‐Eastern cultivars Arrivate and 79‐S10‐10 were resistant to all isolates except R5 and S5.
The Ethiopian cultivar C1 5791, previously reported to be resistant, was susceptible to the R5 and S5 biotypes.
There was a high correlation coefficient between the classification of cultivars for resistance to
D.
teres
f.
sp.
teres
and
D.
teres
f.
sp.
maculata.
A method for conserving the virulence of the isolates on straw is evaluated.
The virulence level of the isolates was the same after 4 years of storage using this method.
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