Population Subdivision of Fusarium graminearum Sensu Stricto in the Upper Midwestern United States

Phytopathology - Tập 97 Số 11 - Trang 1434-1439 - 2007
Liane Rosewich Gale1, Todd J. Ward2, Virgilio Balmas3, Harold Kistler4
1University of Minnesota Twin Cities
2United States Department of Agriculture
3University of Sassari
4Plant Pathology

Tóm tắt

A collection of 712 Fusarium graminearum sensu stricto (s.s.) strains, predominantly gathered between 1999 and 2000 from nine states within the United States, was examined for population structure and polymerase chain reaction-based trichothecene type. Most strains belonged to a cohesive genetic population characterized by a 15-acetyldeoxynivalenol (15ADON) trichothecene type. However, using a Bayesian model-based clustering method, we also identified genetically divergent groups of strains in some sampled locations of Minnesota and North Dakota. Strains of the major group of divergent populations were of a 3ADON trichothecene type and formed a distinct cluster with a collection of previously gathered strains from Italy, which displayed all three trichothecene types (15ADON, 3ADON, and nivalenol). The co-existence of genetically divergent populations of F. graminearum s.s. in the Upper Midwest allows for the rejection of the hypothesis that F. graminearum s.s. in the United States consists of a single population. These results also suggest that recombination has been insufficiently frequent in this homothallic (selfing) fungal species to homogenize the divergent populations observed in the Upper Midwest.

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Tài liệu tham khảo

10.1023/A:1020635214971

10.1016/S0885-5765(03)00092-4

Corazza L., 2002, Petria, 12, 25

10.1093/genetics/164.4.1567

10.1094/PHYTO.2002.92.12.1315

10.1111/j.0032-0862.2004.01061.x

10.1094/PDIS.2004.88.10.1079

Liddell, C. M. 2003. Systematics of Fusarium species and allies associated with Fusarium head blight. Pages 35-43 in: Fusarium Head Blight of Wheat and Barley. K. J. Leonard and W. R. Bushnell, eds. American Phytopathological Society Press, St. Paul, MN.

10.1094/PDIS.2002.86.9.981

10.1038/nrg1226

McMullen, M. 2003. Impacts of Fusarium head blight on the North American agricultural community: the power of one disease to catapult change. Pages 484-503 in: Fusarium Head Blight of Wheat and Barley. K. J. Leonard and W. R. Bushnell, eds. American Phytopathological Society, St. Paul, MN.

10.1094/PDIS.1997.81.12.1340

Mirocha C. J., 1989, Appl. Environ. Microbiol., 55, 1315, 10.1128/aem.55.5.1315-1316.1989

10.1086/282771

10.1073/pnas.70.12.3321

Nei, M. 1987. Molecular Evolutionary Genetics. Columbia University Press, New York.

10.1111/j.1467-9353.2004.00183.x

10.1073/pnas.130193297

10.1016/j.fgb.2004.03.003

10.1093/genetics/155.2.945

10.2307/2410454

10.1094/PHYTO.1999.89.8.623

10.1094/PDIS.1999.83.7.667

10.1111/j.1365-294X.2006.02890.x

10.1073/pnas.142307199

10.1094/PHYTO.2000.90.1.17

10.1046/j.1365-294X.2004.02098.x

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Thông tin xuất bản

Phytopathology

Tập 97 Số 11

1434-1439

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