Virulence and molecular diversity in Colletotrichum graminicola from Brazil

Valério, Henrique Maia; Resende, Maria Aparecida de; Weikert-Oliveira, Rita C. B.; Casela, C. R.

doi:10.1007/s11046-005-0373-y

Cited by 51 publications

(44 citation statements)

References 27 publications

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“…According to Ali and Warren, [2], Thomas, [26], and Hess et al, [11], more intense sorghum anthracnose is associated with high temperature and relative humidity. During the growing season, the occurrence of unseasonal rainfall during the flowering and dough stage coupled with high to moderate temperature (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27) o C) encouraged the development of the disease. In addition, the high variability of the pathogen populations made most sorghum fields without tolerance [27].…”

Section: The Prevalence Incidence and Severity Of Sorghum Diseasesmentioning

confidence: 99%

Prevalence and Intensity of Economically Important Fungal Diseases of Sorghum in South Tigray, Ethiopia

Teferi¹

2015

JPS

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Production and productivity of sorghum is highly threatened by different diseases in South Tigray, Ethiopia.However, the importance of each disease has not been assessed and well profiled to sound management strategy. To determine the occurrence and intensity of diseases survey was carried out in two major sorghum growing districts of South Tigray in 2014 cropping season. Results indicated that 93.7%, 84.8%, 88.6%, 37% and 58% of sorghum fields were infected by anthracnose, leaf blight, long smut, head and loose smuts, and downy mildew, respectively. This indicated that sorghum is suffered from complexes of diseases. The incidence and severity of the former diseases were 69.9% and 53.01%, 55.9% and 38.7%, 23% and 77.2%, 1.9% and 71.7%, and 43.6% and 41%, respectively. Most of the cultivated farmers' cultivars sown were susceptible at least to one disease putting large area of sorghum production at threat. Therefore, holistic and cumulative integrated approach is required to manage the complex diseases in the surveyed areas.

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Section: The Prevalence Incidence and Severity Of Sorghum Diseasesmentioning

confidence: 99%

Prevalence and Intensity of Economically Important Fungal Diseases of Sorghum in South Tigray, Ethiopia

Teferi¹

2015

JPS

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“…in Kabat and Bubák) is the fungal pathogen responsible for sorghum anthracnose (Crouch et al, 2006) and was first reported in Togo, West Africa in 1902 (Thakur and Mathur, 2000). The disease occurs worldwide, but is more commonly observed in tropical or subtropical environments where frequent rainfall, high relative humidity and warm temperatures enhance the development and spread of the disease (Casela et al, 2001;Hess et al, 2002;Marley et al, 2001;Néya and Le Normand, 1998;Ngugi et al, 2002;Thakur and Mathur, 2000;Thomas et al, 1996;Valério et al, 2005). In the United States, anthracnose is more prevalent in the Southern Plains and Southeastern States (Rosewich et al, 1998;Cardwell et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

“…The disease can be successfully managed through the use of resistant cultivars. However, the long-term durability of resistant cultivars is hindered by variation in virulence within the pathogen population Cardwell et al, 1989;Marley et al, 2001Pande et al, 1991Thakur and Mathur, 2000;Valério et al, 2005). Pyramiding of resistance genes can aid in the development of resistant cultivars, but additional sources of resistance are needed for sorghum improvement.…”

Section: Introductionmentioning

confidence: 99%

Field Assessment of Anthracnose Disease Response for the Sorghum Germplasm Collection from the Mopti Region

Erpelding¹

2010

American Journal of Agricultural and Biological Sciences

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Problem statement: Sorghum anthracnose (Colletotrichum sublineolum) is a highly variable pathogen and new sources of host plant resistance are required for the development of resistant sorghum varieties. Germplasm collections are an important source of host plant resistance and screening germplasm will be essential to identify new sources of resistance. Approach: The sorghum (Sorghum bicolor) collection from the Mopti region of Mali was inoculated with Colletotrichum sublineolum and evaluated for foliar anthracnose disease response in Isabela, Puerto Rico during the 2004 and 2005 growing seasons using a partially balanced lattice design with three replications. Results: A resistant response was observed for 45 of the 97 accessions in the collection and mean infection severity for the 52 susceptible accessions was 27.6%. An association was observed between resistance and the administrative district where the germplasm was collected. More than 50% of the accessions from the Bandiagara and Bankass districts showed a resistant response. The lowest frequency of resistant germplasm was observed for the Mopti district with 25% of the accessions showing a resistant response. The susceptible accessions from the Mopti district, however, showed the lowest mean infection severity. Approximately 44% of the accessions from the Douentza district showed a resistant response with the susceptible accessions showing the highest mean infection severity. These results suggest an association between annual rainfall and anthracnose resistance, with sorghum accessions from drier regions showing greater susceptibility. Anthracnose resistance also showed an association with sorghum race classification and race guinea accessions were more frequently resistant as compared to accessions classified as race durra or durra-bicolor. Conclusion: The results indicated that anthracnose resistant sorghum germplasm is frequent in the Mopti region of Mali and that ecogeographic origin and sorghum characterization information can be used to aid in germplasm selection or germplasm acquisition to identify anthracnose resistant sources.

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“…In the United States, the use of resistant varieties is recommended for regions with climatic conditions favorable for the pathogen. Since the pathogen is highly variable and numerous pathotypes are present in most regions (Marley et al, 2001;Valério et al, 2005), pyramiding of host-plant resistance genes may be necessary to increase the longevity of resistant sources. Thus, additional resistant germplasm is needed to increase the genetic diversity of resistant genotypes available for sorghum improvement.…”

Section: Introductionmentioning

confidence: 99%

Anthracnose disease response in the Burundi sorghum germplasm collection

Erpelding¹

2010

ABJNA

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The United States National Plant Germplasm System maintains 151 sorghum accessions from Burundi of which 148 accessions were evaluated for resistance to Colletotrichum sublineolum at the Tropical Agriculture Research Station in Isabela, Puerto Rico in replicated evaluations during the 2007 and 2008 growing seasons. For the 2007 experiment, 120 accessions showed a resistant response with 89 of these accessions rated as resistant in 2008. The resistant accessions showed reddening of inoculated leaves with no acervuli development, whereas accessions rated as susceptible showed acervuli development on inoculated leaves. Mean infection severity based on the percentage of infected leaf area for the susceptible accessions was 2% in 2007 and 2.5% for the 2008 experiment. Only four accessions showed an infection severity more than 10% and eight accessions showed a susceptible response across replications and growing seasons. Results of this study indicate that sorghum germplasm from Burundi is an important source of anthracnose resistance for sorghum improvement and that germplasm from regions of high annual rainfall is frequently associated with anthracnose resistance.

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Virulence and molecular diversity in Colletotrichum graminicola from Brazil

Cited by 51 publications

References 27 publications

Prevalence and Intensity of Economically Important Fungal Diseases of Sorghum in South Tigray, Ethiopia

Prevalence and Intensity of Economically Important Fungal Diseases of Sorghum in South Tigray, Ethiopia

Field Assessment of Anthracnose Disease Response for the Sorghum Germplasm Collection from the Mopti Region

Anthracnose disease response in the Burundi sorghum germplasm collection

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