| Autor: |
Koch Bach RA; Foreign Disease-Weed Science Research Unit, Agricultural Research Service, United States Department of Agriculture, Fort Detrick, Maryland 21702., Murithi HM; Agricultural Research Service Research Participation Program through the Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37831.; International Institute of Tropical Agriculture, Nairobi, Kenya., Coyne D; International Institute of Tropical Agriculture, Nairobi, Kenya., Clough SJ; Soybean/Maize Germplasm, Pathology and Genetics Research Unit, Agricultural Research Service, United States Department of Agriculture, Urbana, Illinois 61801.; Department of Crop Sciences, University of Illinois, Urbana, Illinois 61801. |
| Jazyk: |
angličtina |
| Zdroj: |
Mycologia [Mycologia] 2024 Nov-Dec; Vol. 116 (6), pp. 936-948. Date of Electronic Publication: 2024 Sep 17. |
| DOI: |
10.1080/00275514.2024.2383114 |
| Abstrakt: |
Soybean red leaf blotch (RLB), caused by the fungus Coniothyrium glycines , represents a foliar disease of soybean that is thus far restricted to Africa. The fungus is listed as a Select Agent by the Federal Select Agent Program because it could pose a severe threat to plant health were it to establish in the United States. Previous work uncovered tremendous molecular diversity at the internal transcribed spacer region, suggesting that there may be multiple species causing RLB. To determine whether multiple species cause RLB, we reconstructed the phylogeny of C. glycines and taxonomic allies using sequence data from four genes. We included 33 C. glycines isolates collected from six African countries and determined that all isolates form a well-supported, monophyletic lineage. Within this lineage there are at least six well-supported clades that largely correspond to geography, with one clade exclusively composed of isolates from Ethiopia, another exclusively composed of isolates from Uganda, and four composed of isolates from southern Africa. However, we did not detect any concordance for these clades between the four genes, indicating that all isolates included in this analysis are representative of a single species. Isolates in the Ethiopia clade are morphologically distinct from isolates in the other clades, as they produce larger sclerotia and smaller pycnida and more sclerotia in planta. Additionally, ancestral range estimations suggest that the C. glycines lineage emerged in southern Africa. These results show that there is significantly more genetic and morphological diversity than was initially suspected with this high-consequence fungal plant pathogen. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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