Gene action for adult-plant resistance to powdery mildew in wheat

Genome ◽  
1995 ◽  
Vol 38 (2) ◽  
pp. 277-282 ◽  
Author(s):  
M. K. Das ◽  
C. A. Griffey
Keyword(s):  
Powdery Mildew ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Gene Action ◽  
Diallel Cross ◽  
Adult Plant ◽  
Additive Interaction ◽  
Dominance Model ◽  
Gene Effects ◽  
Dominance Interaction

Gene action for adult-plant resistance to powdery mildew was studied using generation mean analyses of parents and of F1, F2, and backcross populations derived from a diallel cross of one susceptible and three adult-plant resistant wheat cultivars. Joint scaling tests showed that an additive–dominance model was sufficient to explain the variability in the expression of adult-plant resistance in one cross, while digenic epistasis was involved in the other five crosses. Additive gene effects were predominant; however, dominance was significant in four crosses, additive × additive interaction was significant in three crosses, additive × dominance interaction was significant in three crosses, and dominance × dominance interaction was significant in one cross. Therefore, selection for adult-plant resistance would likely be most effective in advanced generations derived from crosses among the adult-plant resistant cultivars Redcoat, Houser, and Massey.Key words: gene action, adult-plant resistance, Blumeria, Erysiphe graminis f.sp. tritici, Triticum aestivum.

scholarly journals Quantitative Trait Loci Mapping for Adult-Plant Resistance to Powdery Mildew in Bread Wheat

2006 ◽  
Vol 96 (7) ◽  
pp. 784-789 ◽  
Author(s):  
S. S. Liang ◽  
K. Suenaga ◽  
Z. H. He ◽  
Z. L. Wang ◽  
H. Y. Liu ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Powdery Mildew ◽  
Plant Resistance ◽  
Quantitative Trait ◽  
Powdery Mildew Resistance ◽  
Adult Plant Resistance ◽  
Adult Plant ◽  
Phenotypic Variance ◽  
Mildew Resistance ◽  
Trait Loci

Powdery mildew, caused by Blumeria graminis f. sp. tritici, is a major disease to wheat (Triticum aestivum) worldwide. Use of adult-plant resistance (APR) is an effective method to develop wheat cultivars with durable resistance to powdery mildew. In the present study, 432 molecular markers were used to map quantitative trait loci (QTL) for APR to powdery mildew in a doubled haploid (DH) population with 107 lines derived from the cross Fukuho-komugi × Oligoculm. Field trials were conducted in Beijing and Anyang, China during 2003-2004 and 2004-2005 cropping seasons, respectively. The DH lines were planted in a randomized complete block design with three replicates. Artificial inoculation was carried out in Beijing with highly virulent isolate E20 of B. graminis f. sp. tritici and the powdery mildew severity on penultimate leaf was evaluated four times, and the maximum disease severity (MDS) on penultimate leaf was investigated in Anyang under natural inoculation in May 2004 and 2005. The heritability of resistance to powdery mildew for MDS in 2 years and two locations ranged from 0.82 to 0.93, while the heritability for area under the disease progress curve was between 0.84 and 0.91. With the method of composite interval mapping, four QTL for APR to powdery mildew were detected on chromosomes 1AS, 2BL, 4BL, and 7DS, explaining 5.7 to 26.6% of the phenotypic variance. Three QTL on chromosomes 1AS, 2BL, and 7DS were derived from the female, Fukuho-komugi, while the one on chromosome 4BL was from the male, Oligoculm. The QTL on chromosome 1AS showed high genetic effect on powdery mildew resistance, accounting for 19.5 to 26.6% of phenotypic variance across two environments. The QTL on 7DS associated with the locus Lr34/Yr18, flanked by microsatellite Xgwm295.1 and Ltn (leaf tip necrosis). These results will benefit for improving powdery mildew resistance in wheat breeding programs.

Overview and Application of QTL for Adult Plant Resistance to Leaf Rust and Powdery Mildew in Wheat

Crop Science ◽  
2014 ◽  
Vol 54 (5) ◽  
pp. 1907-1925 ◽  
Author(s):  
Zaifeng Li ◽  
Caixia Lan ◽  
Zhonghu He ◽  
Ravi P. Singh ◽  
Garry M. Rosewarne ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Leaf Rust ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Adult Plant

INHERITANCE OF ADULT PLANT RESISTANCE TO POWDERY MILDEW IN SOYBEANS

1978 ◽  
Vol 20 (1) ◽  
pp. 151-153 ◽  
Author(s):  
R. I. Buzzell ◽  
Jerry H. Haas
Keyword(s):  
Glycine Max ◽  
Powdery Mildew ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Dominant Gene ◽  
Recessive Allele ◽  
Adult Plant ◽  
Glycine Max L ◽  
Greenhouse Tests

In greenhouse tests with Microsphaera diffusa Cke &Pk. on soybeans (Glycine max (L.) Merr.), adult plant resistance was found to be governed by a dominant gene, proposed as Rmd, with the recessive allele, rmd, resulting in susceptibility at all stages.

Sign in / Sign up

Export Citation Format

Share Document