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Detection of genetically divergent clone mates in apomictic dandelions
Ted H M Mes1, P Kuperus, J Kirschner
1Department of Parasitology and Tropical Veterinary Medicine, Institute of Infectious Diseases and Immunology, Utrecht University, Yalelaan 1, 3508 TD Utrecht, the Netherlands. t.mes@vet.uu.nl
This study identified genetically diverged clone mates in apomictic dandelions using mutation accumulation. Findings reveal prolonged clonal reproduction and mutation, impacting clone size and age estimations.
Area of Science:
- Plant genetics
- Evolutionary biology
- Reproductive biology
Background:
- Apomictic dandelions (Taraxacum section Naevosa) provide a model for studying clonal reproduction and mutation accumulation.
- Identifying genetically diverged clone mates is crucial for understanding clonal lineage dynamics.
Purpose of the Study:
- To identify genetically diverged clone mates in apomictic dandelions.
- To investigate the role of mutation accumulation in clonal divergence.
- To assess the suitability of Taraxacum section Naevosa for detecting clonal lineages with mutations.
Main Methods:
- Analysis of internal transcribed spacer (ITS) sequences.
- Amplified fragment length polymorphisms (AFLPs).
- Isozyme and microsatellite marker analysis.
- Morphological and chloroplast haplotype assessment.
Main Results:
- ITS sequences showed polymorphisms incompatible with strict clonal structure, suggesting ancestral variation.
- AFLPs, isozymes, and microsatellites strongly supported prolonged clonal reproduction and mutation accumulation.
- A significant number of markers distinguished clone mates within the Norwegian population.
Conclusions:
- Mutation accumulation significantly impacts the genetic structure of clonal lineages.
- Rapidly evolving markers are more effective than ITS for detecting recent mutations in clones.
- Accurate estimates of clone size, range, and age require incorporating mutation detection.
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