scholarly journals Screening of melon genotypes identifies gummy stem blight resistance associated with Gsb1 resistant loci

2018 ◽  
Vol 45 (3) ◽  
pp. 217-227 ◽  
Author(s):  
Md Zahid Hassan ◽  
Arif Hasan Khan Robin ◽  
Md Abdur Rahim ◽  
Sathishkumar Natarajan ◽  
Hoy-Taek Kim ◽  
...  
Keyword(s):  
Blight Resistance ◽  
Stem Blight ◽  
Gummy Stem Blight

Gummy stem blight resistance of cucumbers (Cucumis sativus L.)

Euphytica ◽  
1978 ◽  
Vol 27 (3) ◽  
pp. 861-864 ◽  
Author(s):  
Q. P. Van Der Meer ◽  
J. L. Van Bennekom ◽  
A. C. Van Der Giessen
Keyword(s):  
Cucumis Sativus ◽  
Blight Resistance ◽  
Cucumis Sativus L ◽  
Stem Blight ◽  
Gummy Stem Blight

Genome-wide identification and analysis of promising GDSL-type lipases related to gummy stem blight resistance in watermelon (Citrullus lanatus)

2021 ◽  
Vol 289 ◽  
pp. 110461
Author(s):  
Runsheng Ren ◽  
Xingping Yang ◽  
Jinhua Xu ◽  
Keyun Zhang ◽  
Man Zhang ◽  
...  
Keyword(s):  
Citrullus Lanatus ◽  
Blight Resistance ◽  
Stem Blight ◽  
Gummy Stem Blight ◽  
Genome Wide

scholarly journals QTL associated with gummy stem blight resistance in watermelon

2020 ◽  
Author(s):  
Winnie Gimode ◽  
Kan Bao ◽  
Zhangjun Fei ◽  
Cecilia McGregor
Keyword(s):  
Disease Resistance ◽  
Phenotypic Variation ◽  
Citrullus Lanatus ◽  
Genetic Resistance ◽  
Blight Resistance ◽  
Yield Losses ◽  
Stem Blight ◽  
Gummy Stem Blight ◽  
Cost Of Disease ◽  
Selection Of

Abstract Key message We identified QTLs associated with gummy stem blight resistance in an interspecific F2:3Citrullus population and developed marker assays for selection of the loci in watermelon. Abstract Gummy stem blight (GSB), caused by three Stagonosporopsis spp., is a devastating fungal disease of watermelon (Citrullus lanatus) and other cucurbits that can lead to severe yield losses. Currently, no commercial cultivars with genetic resistance to GSB in the field have been reported. Utilizing GSB-resistant cultivars would reduce yield losses, decrease the high cost of disease control, and diminish hazards resulting from frequent fungicide application. The objective of this study was to identify quantitative trait loci (QTLs) associated with GSB resistance in an F2:3 interspecific Citrullus mapping population (N = 178), derived from a cross between Crimson Sweet (C. lanatus) and GSB-resistant PI 482276 (C. amarus). The population was phenotyped by inoculating seedlings with Stagonosporopsis citrulli 12178A in the greenhouse in two separate experiments, each with three replications. We identified three QTLs (ClGSB3.1, ClGSB5.1 and ClGSB7.1) associated with GSB resistance, explaining between 6.4 and 21.1% of the phenotypic variation. The genes underlying ClGSB5.1 includes an NBS-LRR gene (ClCG05G019540) previously identified as a candidate gene for GSB resistance in watermelon. Locus ClGSB7.1 accounted for the highest phenotypic variation and harbors twenty-two candidate genes associated with disease resistance. Among them is ClCG07G013230, encoding an Avr9/Cf-9 rapidly elicited disease resistance protein, which contains a non-synonymous point mutation in the DUF761 domain that was significantly associated with GSB resistance. High throughput markers were developed for selection of ClGSB5.1 and ClGSB7.1. Our findings will facilitate the use of molecular markers for efficient introgression of the resistance loci and development of GSB-resistant watermelon cultivars.

scholarly journals A re-sequencing-based ultra-dense genetic map reveals a gummy stem blight resistance-associated gene in Cucumis melo

DNA Research ◽  
2017 ◽  
Vol 25 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Zhongyuan Hu ◽  
Guancong Deng ◽  
Haipeng Mou ◽  
Yuhui Xu ◽  
Li Chen ◽  
...  
Keyword(s):  
Genetic Map ◽  
Cucumis Melo ◽  
Blight Resistance ◽  
Stem Blight ◽  
Gummy Stem Blight

Molecular Tagging of Gummy Stem Blight Resistance in Watermelon

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 472e-472
Author(s):  
Young-Seok Kwon ◽  
Young Hyun Om ◽  
Leigh Hawkins ◽  
Fenny Dane
Keyword(s):  
Plant Introduction ◽  
Aflp Markers ◽  
Blight Resistance ◽  
Didymella Bryoniae ◽  
Molecular Tagging ◽  
Stem Blight ◽  
Gummy Stem Blight ◽  
Blight Disease ◽  
Fungus Disease ◽  
Selection Of

The fungus Didymella bryoniae causes gummy stem blight (foliar phase) and black rot (fruit phase) in cucurbits. As resistance to other diseases have been incorporated into cucurbits, losses due to gummy stem blight have increased. Populations derived from crosses between a cultivated watermelon (SS-4), susceptible to the fungus Didymella bryoniae and resistant plant introduction accessions (PI 189225 and PI 272778) are used to detect molecular markers linked to gummy stem blight disease resistance. Genomic DNA was purified from primary leaves of watermelon seedlings before seedlings were inoculated with a spore suspension of the fungus. Disease severity was rated 4 days after inoculation. DNA bulked from resistant or susceptible BC seedlings was amplified to detect AFLP markers. Linkages between gummy stem blight resistance and AFLP markers were identified and should facilitate evaluation and selection of watermelon populations segregating for gummy stem blight resistance.

Factors Promoting Pycnidia Production of Didymella bryoniae, the Causal of Gummy Stem Blight in Cucurbits

2017 ◽  
Vol 45 (1) ◽  
pp. 173-187
Author(s):  
Abdel-Fattah El-Wakil ◽  
Amal Khalil ◽  
Ibrahim El -Abbasi
Keyword(s):  
Didymella Bryoniae ◽  
Stem Blight ◽  
Gummy Stem Blight

scholarly journals QTL Mapping for Gummy Stem Blight Resistance in Watermelon (Citrullus spp.)

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 500
Author(s):  
Eun Su Lee ◽  
Do-Sun Kim ◽  
Sang Gyu Kim ◽  
Yun-Chan Huh ◽  
Chang-Gi Back ◽  
...  
Keyword(s):  
Chromosome 8 ◽  
Chromosome 6 ◽  
Potential Candidate ◽  
Stem Blight ◽  
Gummy Stem Blight ◽  
F2 Population ◽  
Leaf Lesion ◽  
Phenotypic Variations ◽  
A Minor ◽  
Selection Of

Watermelon (Citrulluslanatus) is an economically important fruit crop worldwide. Gummy stem blight (GSB) is one of the most damaging diseases encountered during watermelon cultivation. In the present study, we identified quantitative trait loci (QTLs) associated with GSB resistance in an F2 population derived from a cross between maternal-susceptible line ‘920533’ (C. lanatus) and the paternal-resistant line ‘PI 189225’ (C. amarus). The resistance of 178 F2 plants was assessed by two different evaluation methods, including leaf lesion (LL) and stem blight (SB). To analyze the QTLs associated with GSB resistance, a linkage map was constructed covering a total genetic distance of 1070.2 cM. QTL analysis detected three QTLs associated with GSB resistance on chromosome 8 and 6. Among them, two QTLs, qLL8.1 and qSB8.1 on chromosome 8 identified as major QTLs, explaining 10.5 and 10.0% of the phenotypic variations localizing at same area and sharing the same top markers for both LL and SB traits, respectively. A minor QTL, qSB6.1, explains 9.7% of phenotypic variations detected on chromosome 6 only for the SB trait. High-throughput markers were developed and validated for the selection of resistant QTLs using watermelon accessions, and commercial cultivars. Four potential candidate genes were predicted associated with GSB resistance based on the physical location of flanking markers on chromosome 8. These findings will be helpful for the development of watermelon cultivars resistant to GSB.

Temporal and spatial dynamics of watermelon gummy stem blight epidemics

2010 ◽  
Vol 128 (4) ◽  
pp. 473-482 ◽  
Author(s):  
Adalberto C. Café-Filho ◽  
Gil R. Santos ◽  
Francisco F. Laranjeira
Keyword(s):  
Spatial Dynamics ◽  
Stem Blight ◽  
Gummy Stem Blight ◽  
Temporal And Spatial

Boscalid Insensitivity Documented in Didymella bryoniae Isolated from Watermelon in Florida and North Carolina

2012 ◽  
Vol 13 (1) ◽  
pp. 42
Author(s):  
Katherine L. Stevenson ◽  
Anthony P. Keinath ◽  
Anna Thomas ◽  
David B. Langston ◽  
Pamela D. Roberts ◽  
...  
Keyword(s):  
North Carolina ◽  
South Carolina ◽  
High Frequency ◽  
In Vitro Assays ◽  
Didymella Bryoniae ◽  
Triazole Fungicides ◽  
Stem Blight ◽  
Gummy Stem Blight ◽  
Commercial Mixture

The fungicide Pristine, a commercial mixture of pyraclostrobin and boscalid, has been used widely on watermelon and other cucurbits to control gummy stem blight, caused by the fungus Didymella bryoniae. Since 2007, isolates of D. bryoniae insensitive to boscalid have been found in Georgia, Indiana, and South Carolina. Most isolates of D. bryoniae obtained in 2009 and 2010 from diseased watermelon leaves collected in several counties in Florida and North Carolina were found to be insensitive to boscalid using in vitro assays. Gummy stem blight would not be effectively managed with Pristine in any of the counties where samples were collected due to the high frequency of insensitivity to boscalid. Fortunately growers can instead use several triazole fungicides registered for use on cucurbits since 2009. Accepted for publication 30 March 2012. Published 18 May 2012.

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