Evidence of pathogenic variation in Sclerospora graminicola populations from pearl millet growing regions in Senegal

Kanfany, Ghislain; Zoclanclounon, Yedomon Ange Bovys; Tongoona, Pangirayi; Danquah, Agyemang; Offei, Samuel Kwame; Fofana, Amadou; Thiaw, Cheikh; Danquah, Eric; Cissé, Ndiaga

doi:10.1007/s42161-018-0090-2

Cited by 3 publications

(5 citation statements)

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“…This study provided information about downy mildew prevalence in pearl millet production areas of Senegal. The presence of downy mildew in Senegal has also been reported by Girard [22] and recently confirmed by Kanfany et al [16] in the major pearl millet production regions in Senegal. This highlights the wide distribution of the disease which is known to be present in the major pearl millet-growing regions.…”

Section: Discussionsupporting

confidence: 74%

“…This suggests virulence variation in S. graminicola across surveyed zones. These results were confirmed by Kanfany et al [16]. The presence of genetic variability may also be suspected.…”

Section: Discussionsupporting

confidence: 71%

“…is considered as the most destructive disease of pearl millet with significant economic impact on grain yield and fodder quality in drought-prone areas in Africa and Asia [10, 11]. A disease incidence of 45-95% and a yield loss of 20-80% have been reported by [12, 13].…”

Section: Introductionmentioning

confidence: 99%

“…In Senegal, downy mildew incidence of 65% and subsequent low yield of 487 kg ha −1 were reported in the T99B genotype during the rainy season of 2004 [14]. Recently, Kanfany et al [15] identified 55 resistant inbred lines and highlighted the existence of pathogenic variation across four agricultural research stations of National Agricultural Institute of Senegal [16]. However, the real status of downy mildew prevalence in rural area conditions is not well known.…”

Section: Introductionmentioning

confidence: 99%

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Current Status of Pearl Millet Downy Mildew Prevalence across Agroecological Zones of Senegal

Zoclanclounon

Kanfany

Kane

et al. 2019

The Scientific World Journal

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Pearl millet is a dominant staple cereal crop for smallholder farmers in Senegal. However, the crop is constrained by various nonbiotic and biotic stresses such as downy mildew disease. To assess the prevalence of this disease in Senegal, a field survey was conducted during the rainy season of 2017 across eight main pearl millet production regions following latitudinal gradient with different climatic conditions. Results showed that downy mildew prevalence was higher in Kaolack (incidence = 68.19%), Kaffrine (incidence = 77.19%), Tambacounda (incidence = 97.03%), Sedhiou (incidence = 82.78%), and Kolda (incidence = 98.01%) than Thies (incidence = 28.21%), Diourbel (incidence = 24.46%), and Fatick (incidence = 37.75%) regions. The field survey revealed an incidence as high as 98% and 28% of infected area in surveyed fields. Significant correlations between geographic coordinates, disease incidence, and infected areas were also observed. This study provided information that could help to understand the prevalence of downy mildew in pearl millet in Senegal.

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Section: Discussionsupporting

confidence: 74%

“…This suggests virulence variation in S. graminicola across surveyed zones. These results were confirmed by Kanfany et al [16]. The presence of genetic variability may also be suspected.…”

Section: Discussionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Current Status of Pearl Millet Downy Mildew Prevalence across Agroecological Zones of Senegal

Zoclanclounon

Kanfany

Kane

et al. 2019

The Scientific World Journal

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“…In such hybrid breeding, the foremost requirement is resistance to DM pathogen but limited information is available about the mechanism of resistance to downy mildew disease in pearl millet. At implementing a hybrid breeding program resistance to disease should be one of the key selection criteria and potential parents should be tested for disease reactions to DM pathogens at identified disease hotspots globally (Kanfany et al 2018). Likewise, monitoring stability of resistance in the breeding lines against more virulent populations is an important component of resistance breeding in pearl millet for the success of improved varieties and hybrids in the farmer fields.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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Downy mildew (DM) caused by Sclerospora graminicola is the most devastating disease of pearl millet. It may lead to annual grain yield losses of up tõ 80% and substantial deterioration of forage quality and production. The present study reports construction of the linkage map integrating simple sequence repeat (SSR) markers, for detection of quantitative trait loci (QTLs) associated with DM resistance in pearl millet. A mapping population comprising of 187 F 8 recombinant inbred lines (RILs) was developed from the cross (ICMB 89111-P6 × ICMB 90111-P6). The RILs were evaluated for disease reaction at a juvenile stage in the greenhouse trials. Genotyping data was generated from 88 SSR markers on RILs and used to construct genetic linkage map comprising of 53 loci on seven linkage groups (LGs) spanning a total length of 903.8 cM with an average adjacent marker distance of 18.1 cM. Linkage group 1 (LG1; 241.1 cM) was found to be longest andLG3 the shortest (23.0 cM) in length. The constructed linkage map was used to detect five large effect QTLs for resistance to three different pathotype-isolates of S. graminicola from Gujarat (Sg445), Haryana (Sg519) and Rajasthan (Sg526) states of India. One QTL was detected for isolate Sg445 resistance, and two each for Sg519 and Sg526 resistance on LG4 with LOD scores ranging from 5.1 to 16.0, explaining a wide range (16.7% to 78.0%) of the phenotypic variation (R 2 ). All the five co-localized QTLs on LG4 associated with the DM resistance to the three pathotype-isolates were contributed by the resistant parent ICMB 90111-P6. The QTLs reported here may be useful for the breeding programs aiming to develop DM resistant pearl millet cultivars with other desirable traits using genomic selection (GS) approaches. Keywords Quantitative trait loci (QTLs) . Downy mildew . Recombinant inbred lines (RILs) . Linkage map . Linkage groups (LG) and simple sequence repeats (SSRs) Abbreviations CIM Composite interval mapping cM Centimorgan DM Downy mildew DMI Downy mildew incidence DMR Downy mildew resistance FAO Food and Agriculture Organization of the United Nations LG Linkage group Eur J Plant Pathol

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Natural uptake of anti-oomycetes Trichoderma produced secondary metabolites from pearl millet seedlings – A new mechanism of biological control of downy mildew disease

et al. 2021

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Evidence of pathogenic variation in Sclerospora graminicola populations from pearl millet growing regions in Senegal

Cited by 3 publications

References 11 publications

Current Status of Pearl Millet Downy Mildew Prevalence across Agroecological Zones of Senegal

Current Status of Pearl Millet Downy Mildew Prevalence across Agroecological Zones of Senegal

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

Natural uptake of anti-oomycetes Trichoderma produced secondary metabolites from pearl millet seedlings – A new mechanism of biological control of downy mildew disease

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