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

Abstract

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.

Morphological and Molecular Identification of the Causal Agent of Anthracnose Disease of Avocado in Kenya

“…Colletotrichum gloeosporioides identified in this study has been reported as the most common and wide spread pathogen in all avocado growing region worldwide [ 36 – 38 ]. Further it has been associated with infection of other hosts such as almond, coffee, guava, apple, dragon fruit, cassava, mango, sorghum, and strawberry [ 2 , 15 , 39 ]. Though C. boninense identified is not very common in the study area, its sequence was identical to published sequence (KX 343044.1 and KU356916.1) in the Genbank.…”

EFFECTIVENESS OF CULTURAL PARAMETERS ON THE GROWTH AND SPORULATION OF <i>COLLETOTRICHUM GLOEOSPORIOIDES</i> CAUSING ANTHRACNOSE DISEASE OF MANGO (<i>MANGIFERA INDICA</i> L.)

“…It is widely grown in different countries of the world and is attacked by a number of diseases of which anthracnose is one of the most common especially in India and loss due to this disease is substantial (Slade et al, 1987). Anthracnose caused by C. gloeosporioides is reported on a wide variety of crop, including almond, avocado, apple, arabica coffee, guava, mango, dragon fruit, cassava, sorghum and strawberry (Amusa et al, 2005;Masyahit et al, 2009;Owolade et al, 2009;Erpelding, 2010).…”

Genomic-Assisted Enhancement in Stress Tolerance for Productivity Improvement in Sorghum

“…The strategies for increasing production against fungal pathogens, genetic engineering, and classical breeding for the traits conferring tolerance and resistance could be a precise approach for decreasing the losses caused by them. All the areal parts of sorghum including tissues can be infested by anthracnose (Erpelding 2010). On all of the above ground tissues of the sorghum plant, anthracnose infection can be detected that includes seed, panicle, stalk, and leaf (Hess et al 2002;Thakur and Mathur 2000).…”