| genome size determination in peronosporales (oomycota) by feulgen image analysis. | genome size was determined, by nuclear feulgen staining and image analysis, in 46 accessions of 31 species of peronosporales (oomycota), including important plant pathogens such as bremia lactucae, plasmopara viticola, pseudoperonospora cubensis, and pseudoperonospora humuli. the 1c dna contents ranged from 0.046 (45. 6 mb) to 0.163 pg (159.9 mb). this is 0.041- to 0.144-fold that of glycine max (soybean, 1c = 1.134 pg), which was used as an internal standard for genome size determination. the l ... | 1998 | 9917372 |
| predicting infection risk of hop by pseudoperonospora humuli. | abstract downy mildew, caused by pseudoperonospora humuli, is one of the most destructive diseases of hop. weather factors associated with infection risk by p. humuli in the maritime region of western oregon were examined for 24- and 48-h periods and quadratic discriminant function models were developed to classify periods as favorable for disease development on leaves. for the 24-h data sets, the model with superior predictive ability included variables for hours of relative humidity>80%, degre ... | 2009 | 19740033 |