Detection of powdery mildew in two winter wheat cultivars using canopy hyperspectral reflectance

2013 ◽  
Vol 45 ◽  
pp. 124-131 ◽  
Author(s):  
Xueren Cao ◽  
Yong Luo ◽  
Yilin Zhou ◽  
Xiayu Duan ◽  
Dengfa Cheng
Keyword(s):  
Powdery Mildew ◽  
Winter Wheat ◽  
Wheat Cultivars ◽  
Hyperspectral Reflectance ◽  
Winter Wheat Cultivars

scholarly journals PmLX66 and PmW14: New Alleles of Pm2 for Resistance to Powdery Mildew in the Chinese Winter Wheat Cultivars Liangxing 66 and Wennong 14

Plant Disease ◽  
2015 ◽  
Vol 99 (8) ◽  
pp. 1118-1124 ◽  
Author(s):  
Yanling Sun ◽  
Jingwei Zou ◽  
Huigai Sun ◽  
Wei Song ◽  
Xiaoming Wang ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Winter Wheat ◽  
Northern China ◽  
Blumeria Graminis ◽  
Wheat Cultivars ◽  
Winter Wheat Cultivars ◽  
Allelism Tests ◽  
The Relationship ◽  
Dominant Genes ◽  
New Alleles

Wheat powdery mildew (caused by Blumeria graminis f. sp. tritici) can be effectively managed by growing resistant cultivars. ‘Liangxing 66’ and ‘Wennong 14’ are the current winter wheat cultivars grown in northern China where powdery mildew is epidemic. Both cultivars have been demonstrated to carry single dominant genes for resistance to powdery mildew, tentatively designated PmLX66 and PmW14, on chromosome 5DS and share common linked markers with Pm2. Allelism tests were performed using a total of 15,657 plants of F2 segregating populations to determine the relationship between PmLX66, PmW14, and Pm2. All progeny from the crosses Liangxing 66 × ‘Ulka/8*Chancellor’ (Ulka/8*Cc), Wennong 14 × Ulka/8*Cc, and Liangxing 66 × Wennong 14 were resistant when tested with B. graminis f. sp. tritici isolate E20, indicating that PmLX66 and PmW14 are allelic to Pm2 and to each other. Liangxing 66 was resistant to 76.7% of the 60 B. graminis f. sp. tritici isolates from northern China, a slightly smaller proportion than Ulka/8*Cc (78.3%). However, Wennong 14 (85.0%) was more resistant against this set of B. graminis f. sp. tritici isolates than Ulka/8*Cc and Liangxing 66. Liangxing 66 and Wennong 14 differed from Ulka/8*Cc in respect to a number of B. graminis f. sp. tritici isolates. Based on these findings, PmLX66 and PmW14 are new alleles at the Pm2 locus.

scholarly journals Development of powdery mildew and leaf rust epidemics in winter wheat cultivars

2011 ◽  
Vol 49 (No. 10) ◽  
pp. 439-442
Author(s):  
L. Věchet
Keyword(s):  
Powdery Mildew ◽  
Winter Wheat ◽  
Leaf Rust ◽  
Disease Severity ◽  
Wheat Cultivars ◽  
Winter Wheat Cultivars

Development of powdery mildew and leaf rust epidemics was examined on three winter wheat cultivars with different predispositions to powdery mildew in three-year experiments. The progress of powdery mildew and leaf rust on the same cultivar was conditioned by its dissimilar susceptibility to the respective disease. Fit temperature played an important role at the beginning of the particular disease and during its progress. Significant differences in the disease severity of powdery mildew and leaf rust were recorded on single leaves. Disease severity of leaf rust was higher on upper leaves while disease severity of powdery mildew was higher on lower leaves.

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