GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Subjective components of mildew assessment on spring barley (1994)
    Springer
    European journal of plant pathology 100 (1994), S. 395-412 
    Details
    ISSN: 1573-8469
    Keywords: mildew ; Erysiphe graminis f.sp.hordei ; barley ; assessment ; keys ; DISTRAIN ; field trials ; linear regression analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The severity of mildew on barley is usually assessed visually and this leads to variation between different scorers. Field assessments by four assessors were analysed to determine the nature and degree of subjective discrepancies between assessors. Two inexperienced assessors failed to detect a major effect of nitrogen due to differences in the interpretation of a scoring system. A computer-based training programme was evaluated for standardising assessments, and was found to improve assessors' accuracy. Linear regression analysis was used here to resolve the error variance into components representing the accuracy and precision of the assessors. Plots of the cumulative differences between the estimate of disease severity by each assessor and the best estimate were used to display how the discrepancies varied with the level of disease. Some modifications to the barley field scoring system are suggested to improve comparability between assessors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01874807
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Detection of tolerance of barley cultivars to infection by powdery mildew (Erysiphe graminis f.sp. hordei) (1994)
    Springer
    Euphytica 75 (1994), S. 179-187 
    Details
    ISSN: 1573-5060
    Keywords: Tolerance ; barley ; powdery mildew ; yield ; Hordeum vulgare ; Erysiphe graminis hordei
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Barley genotypes representing a wide range of resistance expressions and origins, from major resistance genes in modern cultivars to field resistances in landraces, were assessed for tolerance to disease under glasshouse and field conditions. A few genotypes were picked out as showing less yield loss than would be expected from the level of mildew infection. Genotypes showing more than the expected yield loss were also found. The potential use of tolerance as a breeding character is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00025602
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Evaluation of sources of partial resistance to mildew in barley using enzyme-linked immunosorbent assay and other assessment methods (1992)
    Springer
    Euphytica 66 (1992), S. 27-34 
    Details
    ISSN: 1573-5060
    Keywords: barley ; powdery mildew ; colony biomass ; partial resistance ; ELISA ; selection ; screening ; adult plant resistance ; resistance components ; Erysiphe graminis ; Hordeum vulgare
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Twenty-nine spring barley genotypes ranging from primitive landraces to modern cultivars were characterised for partial resistance to powdery mildew on detached leaves and in the field. Detached seedling and adult plant leaves were produced under spore-free glasshouse conditions and were assessed for infection frequency (IF) and then total mildew biomass using enzyme-linked immunosorbent assay (ELISA), and thereby biomass per colony (BMC), following controlled infection. Field plants were assessed visually for infection and for total mildew biomass using ELISA. Several genotypes were identified as having below average IF and BMC on both seedling and adult detached leaves and field scores of leaf area infected with mildew. IF at the seedling stage was highly correlated with IF at adult plant stage and with mildew biomass in the field. Adult plant IF was highly correlated with visual field scores. BMC data were often negatively correlated with other assessments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023505
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The effect of specific and non-specific resistance in mixtures of barley or genotypes on infection by mildew (Erysiphe graminis f. sp. hordei) and on yield (1991)
    Springer
    Euphytica 59 (1991), S. 73-81 
    Details
    ISSN: 1573-5060
    Keywords: Multivar ; barley ; mildew ; cultivar mixtures ; polygenic partial ; quantitative resistance ; competition ; yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Preliminary field trials indicated that the yields of mixtures of barley cultivars partially resistant to mildew (Erysiphe graminis f. sp. hordei) were greater than those expected from the mean of their components. Subsequent trials in 1988, 1989 and 1990 demonstrated that such mixtures gave enhanced yield. However, fungicide treatment of mixtures gave significant positive and negative effects on yield. In mixtures with cultivars containing partial resistance there was evidence of a positive relationship between high yield loss due to mildew (low disease tolerance) in cultivars grown in monoculture and their yield advantage in mixtures. The converse resulted in yield disadvantage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00025363
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...