Population Structure of Colletotrichum tanaceti in Australian Pyrethrum Reveals High Evolutionary Potential
| Autor: | Paul J. Taylor, Peter K. Ades, Jason B. Scott, Ruvini V. Lelwala |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine education.field_of_study biology Pyrethrum Population Chrysanthemum cinerariifolium Zoology Plant Science Population biology biology.organism_classification 01 natural sciences Sexual reproduction Gene flow 03 medical and health sciences 030104 developmental biology Propagule Biological dispersal education Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Phytopathology®. 109:1779-1792 |
| ISSN: | 1943-7684 0031-949X |
| Popis: | Colletotrichum tanaceti, the causal agent of anthracnose, is an emerging pathogen of commercially grown pyrethrum (Tanacetum cinerariifolium) in Australia. A microsatellite marker library was developed to understand the spatio-genetic structure over three sampled years and across two regions where pyrethrum is cultivated in Australia. Results indicated that C. tanaceti was highly diverse with a mixed reproductive mode; comprising both sexual and clonal reproduction. Sexual reproduction of C. tanaceti was more prevalent in Tasmania than in Victoria. Little differentiation was observed among field populations likely due to isolation by colonization but most of the genetic variation was occurring within populations. C. tanaceti was likely to have had a long-distance gene and genotype flow among distant populations within a state and between states. Anthropogenic transmission of propagules and wind dispersal of ascospores are the most probable mechanisms of long-distance dispersal of C. tanaceti. Evaluation of putative population histories suggested that C. tanaceti most likely originated in Tasmania and expanded from an unidentified host onto pyrethrum. Victoria was later invaded by the Tasmanian population. With the mixed mode of reproduction and possible long-distance gene flow, C. tanaceti is likely to have a high evolutionary potential and thereby has ability to adapt to management practices in the future. |
| Databáze: | OpenAIRE |
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