The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Origin of a fungal symbiont of perennial ryegrass by interspecific hybridization of a mutualist with the ryegrass choke pathogen, Epichloë typhina.
Abstract
Seed-borne fungal symbionts (endophytes) provide many cool-season grass species with biological protection from biotic and abiotic stresses. The endophytes are asexual, whereas closely related sexual species of genus Epichloë (Clavicipitales) cause grass choke disease. Perennial ryegrass (Lolium perenne) is a host of two endophyte taxa, LpTG-1 (L. perenne endophyte taxonomic grouping one = Acremonium lolii) and LpTG-2, as well as the choke pathogen, Epichloë typhina (represented by isolate E8). Relationships among these fungi and other Epichloë species were investigated by analysis of gene sequences, DNA polymorphisms and allozymes. The results indicate that LpTG-2 is a heteroploid derived from an interspecific hybrid. The LpTG-2 isolates had two copies each of nine out of ten genes analyzed (the exception being the rRNA gene locus), and the profiles for seven of these were composites of those from E. typhina E8 and A. lolii isolate Lp5. Molecular phylogenetic analysis grouped the two beta-tubulin genes of LpTG-2 into separate clades. One (tub2-1) was related to that of E. typhina E8, and the other (tub2-2) to that of A. lolii. The mitochondrial DNA profile of LpTG-2 was similar to that of A. lolii, but its rRNA gene sequence grouped it with E. typhina E8. A proposed model for the evolution of LpTG-2 involves infection of a L. perenne-A. lolii symbiotum by E. typhina, followed by hybridization of the two fungi. Such interspecific hybridization may be a common and important mechanism for genetic variation in Epichloë endophytes.
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Cites
Penny, D., Foulds, L. R., & Hendy, M. D. (1982) · Nature · doi:10.1038/297197a0 · Cited by 213
Cited by
Molecular systematics and phylogeography of the Gibberella fujikuroi species complex
O'Donnell, K., Cigelnik, E., & Nirenberg, H. I. (1998) · Mycologia · doi:10.1080/00275514.1998.12026933 · Cited by 963
O'Donnell, K., Kistler, H. C., Tacke, B. K., & Casper, H. H. (2000) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.130193297 · Cited by 851
O’Donnell, K., Nirenberg, H. I., Aoki, T., & Cigelnik, E. (2000) · Mycoscience · doi:10.1007/bf02464387 · Cited by 599
Bioprotective Alkaloids of Grass-Fungal Endophyte Symbioses
Bush, L. P., Wilkinson, H. H., & Schardl, C. L. (1997) · Plant Physiology · doi:10.1104/pp.114.1.1 · Cited by 503
Self-citationClavicipitaceous endophytes: Their ability to enhance resistance of grasses to multiple stresses
Kuldau, G., & Bacon, C. (2008) · Biological Control · doi:10.1016/j.biocontrol.2008.01.023 · Cited by 340
Metadata
- Authors
- Schardl, C. L., Leuchtmann, A., Tsai, H. F., Collett, M. A., Watt, D. M., & Scott, D. B.
- Venue
- Genetics
- Publisher
- Oxford University Press (OUP)
- Published
- 1994-04-01
- Volume
- 136
- Issue
- 4
- Pages
- 1307-1317
- ISSN
- 0016-6731 (ISSN-L)
- 1943-2631
- OpenAlex
- W1954570390
- Cited by
- 198
- References
- 1
- FWCI
- 21.01
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Origin of a fungal symbiont of perennial ryegrass by interspecific hybridization of a mutualist with the ryegrass choke pathogen, Epichloë typhina. https://app.cochat.ai/papers/10.1093/genetics/136.4.1307
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- Schardl, C. L., Leuchtmann, A., Tsai, H. F., Collett, M. A., Watt, D. M., & Scott, D. B. (1994). Origin of a fungal symbiont of perennial ryegrass by interspecific hybridization of a mutualist with the ryegrass choke pathogen, Epichloë typhina. Genetics. https://doi.org/10.1093/genetics/136.4.1307
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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