Temporal shifts in genetic structure and differentiation of Cercospora beticola populations in table beet fields of New York
Presentation
Paper/Presentation Title | Temporal shifts in genetic structure and differentiation of Cercospora beticola populations in table beet fields of New York |
---|---|
Presentation Type | Presentation |
Authors | Knight, Noel L. (Author), Vaghefi, Niloofar (Animator), Hansen, Zachariah R. (Author), Kikkert, Julie R. (Author) and Pethybridge, Sarah J. (Author) |
Journal or Proceedings Title | Phytopathology: International Journal of the American Phytopathological Society |
Journal Citation | 107 (12S), p. 201 |
Number of Pages | 1 |
Year | 2017 |
Publisher | American Phytopathological Society |
Place of Publication | St Paul, United States |
ISSN | 0031-949X |
1943-7684 | |
Web Address (URL) of Paper | https://apsjournals.apsnet.org/doi/10.1094/PHYTO-107-12-S5.196 |
Conference/Event | 2017 Annual Meeting of the Northeastern Division of the American Phytopathological Society |
Event Details | 2017 Annual Meeting of the Northeastern Division of the American Phytopathological Society Event Date 01 to end of 03 Nov 2017 Event Location Quebec City, Canada |
Abstract | Cercospora leaf spot (CLS), caused by Cercospora beticola, is an important fungal foliar disease of table beet (Beta vulgaris ssp. vulgaris). In broad-acre table beet production CLS may cause defoliation, which prevents mechanized harvesting and leads to substantial crop loss. Previous studies have characterized high allelic and genotypic diversity within C. beticola populations in table beet fields in New York, which may be suggestive of an active sexual morph. Rapid evolution of resistance to fungicides as a function of this diversity threatens the durability of the dominant control tactic for this disease. This study quantifies temporal changes in genetic structure and differentiation of C. beticola populations from three locations in New York, using 12 microsatellite markers. High allelic (Nei’s index of gene diversity (He) = 0.34 to 0.61) and genotypic diversity (Simpson’s complement index (λ) = 0.75 to 0.97) was present in each population. Indices of differentiation between years varied, with pairwise index of differentiation (φPT) values ranging from 0.02 to 0.25 for clone-corrected data, indicating significant genetic differentiation in some locations. No multilocus genotype was shared between years or locations. Hypotheses to explain significant temporal shifts in genetic diversity and population differentiation are being investigated. The diversity and variation in C. beticola populations reveals the potential for rapid genetic changes, including an increased risk of fungicide resistance development. This information highlights the importance of adhering to best management guidelines for fungicides in conventional table beet production. |
ANZSRC Field of Research 2020 | 310805. Plant pathology |
310599. Genetics not elsewhere classified | |
Public Notes | Abstracts only published from Conference. |
Byline Affiliations | Cornell University, United States |
Centre for Crop Health | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q497y/temporal-shifts-in-genetic-structure-and-differentiation-of-cercospora-beticola-populations-in-table-beet-fields-of-new-york
187
total views7
total downloads1
views this month0
downloads this month