Genetic diversity and structure in regional Cercospora beticola populations from Beta vulgaris ssp. vulgaris suggest two clusters of separate origin
Article
Article Title | Genetic diversity and structure in regional Cercospora beticola populations from Beta vulgaris ssp. vulgaris suggest two clusters of separate origin |
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ERA Journal ID | 2639 |
Article Category | Article |
Authors | Knight, Noel L. (Author), Vaghefi, Niloofar (Author), Kikkert, Julie R. (Author), Bolton, Melvin D. (Author), Secor, Gary A. (Author), Rivera, Viviana V. (Author), Hanson, Linda E. (Author), Nelson, Scot C. (Author) and Pethybridge, Sarah J. (Author) |
Journal Title | Phytopathology: International Journal of the American Phytopathological Society |
Journal Citation | 109 (7), pp. 1280-1292 |
Number of Pages | 13 |
Year | 2019 |
Publisher | American Phytopathological Society |
Place of Publication | United States |
ISSN | 0031-949X |
1943-7684 | |
Digital Object Identifier (DOI) | https://doi.org/10.1094/PHYTO-07-18-0264-R |
Web Address (URL) | https://apsjournals.apsnet.org/doi/abs/10.1094/PHYTO-07-18-0264-R |
Abstract | Cercospora leaf spot, caused by Cercospora beticola, is a highly destructive disease of Beta vulgaris ssp. vulgaris worldwide. Cercospora beticola populations are usually characterized by high genetic diversity, but little is known of the relationships among populations from different production regions around the world. This information would be informative of population origin and potential pathways for pathogen movement. For the current study, the genetic diversity, differentiation, and relationships among 948 C. beticola isolates in 28 populations across eight geographic regions were investigated using 12 microsatellite markers. Genotypic diversity, as measured by Simpson’s complement index, ranged from 0.18 to 1.00, while pairwise index of differentiation values ranged from 0.02 to 0.42, with the greatest differentiation detected between two New York populations. In these populations, evidence for recent expansion was detected. Assessment of population structure identified two major clusters, the first associated with New York, and the second with Canada, Chile, Eurasia, Hawaii, Michigan, North Dakota, and one population from New York. Inferences of gene flow among these regions suggested the source for one cluster likely is Eurasia, whereas the source for the other cluster is not known. These results suggest a shared origin of C. beticola populations across regions, except for part of New York, where population divergence has occurred. These findings support the hypothesis that dispersal of C. beticola occurs over long distances. |
ANZSRC Field of Research 2020 | 300804. Horticultural crop protection (incl. pests, diseases and weeds) |
310805. Plant pathology | |
310599. Genetics not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Cornell University, United States |
Red River Valley Agricultural Research Centre, United States | |
North Dakota State University, United States | |
Michigan State University, United States | |
University of Hawaii, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q536v/genetic-diversity-and-structure-in-regional-cercospora-beticola-populations-from-beta-vulgaris-ssp-vulgaris-suggest-two-clusters-of-separate-origin
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