scholarly journals Mapping quantitative trait loci for downy mildew resistance in pearl millet

1995 ◽  
Vol 91 (3) ◽  
pp. 448-456 ◽  
Author(s):  
E. S. Jones ◽  
C. J. Liu ◽  
M. D. Gale ◽  
C. T. Hash ◽  
J. R. Witcombe
Keyword(s):  
Quantitative Trait Loci ◽  
Downy Mildew ◽  
Pearl Millet ◽  
Quantitative Trait ◽  
Downy Mildew Resistance ◽  
Mildew Resistance ◽  
Trait Loci

Identification of quantitative trait loci for downy mildew resistance in cucumber (Cucumis sativus L.)

Euphytica ◽  
2014 ◽  
Vol 198 (2) ◽  
pp. 265-276 ◽  
Author(s):  
Yosuke Yoshioka ◽  
Yoshiteru Sakata ◽  
Mitsuhiro Sugiyama ◽  
Nobuko Fukino
Keyword(s):  
Quantitative Trait Loci ◽  
Downy Mildew ◽  
Cucumis Sativus ◽  
Quantitative Trait ◽  
Downy Mildew Resistance ◽  
Cucumis Sativus L ◽  
Mildew Resistance ◽  
Trait Loci

scholarly journals Mapping quantitative trait loci (QTLs) associated with resistance to major pathotype-isolates of pearl millet downy mildew pathogen

2019 ◽  
Vol 154 (4) ◽  
pp. 983-994 ◽  
Author(s):  
Durgaraju Chelpuri ◽  
Rajan Sharma ◽  
Kilaru Kanaka Durga ◽  
Pooja Katiyar ◽  
Mahesh D. Mahendrakar ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Downy Mildew ◽  
Pearl Millet ◽  
Quantitative Trait ◽  
Trait Loci

scholarly journals Mapping Quantitative Trait Loci for Resistance to Downy Mildew in Pearl Millet

Crop Science ◽  
2002 ◽  
Vol 42 (4) ◽  
pp. 1316-1323 ◽  
Author(s):  
E. S. Jones ◽  
W. A. Breese ◽  
C. J. Liu ◽  
S. D. Singh ◽  
D. S. Shaw ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Downy Mildew ◽  
Pearl Millet ◽  
Quantitative Trait ◽  
Trait Loci

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.

scholarly journals Integration of gene-based markers in a pearl millet genetic map for identification of candidate genes underlying drought tolerance quantitative trait loci

2012 ◽  
Vol 12 (1) ◽  
pp. 9 ◽  
Author(s):  
Deepmala Sehgal ◽  
Vengaldas Rajaram ◽  
Ian Peter Armstead ◽  
Vincent Vadez ◽  
Yash Pal Yadav ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Drought Tolerance ◽  
Candidate Genes ◽  
Pearl Millet ◽  
Genetic Map ◽  
Quantitative Trait ◽  
Trait Loci ◽  
Gene Based Markers

scholarly journals Relationship Between Loci Conferring Downy Mildew and Powdery Mildew Resistance in Melon Assessed by Quantitative Trait Loci Mapping

2005 ◽  
Vol 95 (5) ◽  
pp. 556-565 ◽  
Author(s):  
L. Perchepied ◽  
M. Bardin ◽  
C. Dogimont ◽  
M. Pitrat
Keyword(s):  
Quantitative Trait Loci ◽  
Powdery Mildew ◽  
Downy Mildew ◽  
Resistance Genes ◽  
Quantitative Trait ◽  
Pseudoperonospora Cubensis ◽  
Podosphaera Xanthii ◽  
Resistance Qtl ◽  
Trait Loci ◽  
Artificial Inoculations

Partial resistance to downy mildew (Pseudoperonospora cubensis) and complete resistance to powdery mildew (Podosphaera xanthii races 1, 2, 3, and 5 and Golovinomyces cichoracearum race 1) were studied using a recombinant inbred line population between ‘PI 124112’ (resistant to both diseases) and ‘Védrantais’ (susceptible line). A genetic map of melon was constructed to tag these resistances with DNA markers. Natural and artificial inoculations of Pseudoperonospora cubensis were performed and replicated in several locations. One major quantitative trait loci (QTL), pcXII.1, was consistently detected among the locations and explained between 12 to 38% of the phenotypic variation for Pseudoperonospora cubensis resistance. Eight other Pseudoperonospora cubensis resistance QTL were identified. Artificial inoculations were performed with several strains of four races of Podosphaera xanthii and one race of G. cichoracearum. Two independent major genes, PmV.1 and PmXII.1, were identified and shown to be involved in the simple resistance to powdery mildew. Three digenic epistatic interactions involving four loci were detected for two races of Podosphaera xanthii and one race of G. cichoracearum. Co-localization between PmV.1, resistance genes, and resistance genes homologues was observed. Linkage between the major resistance QTL to Pseudoperonospora cubensis, pcXII.1, and one of the two resistance genes to powdery mildew, PmXII.1, was demonstrated.

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