A novel method to infer the origin of polyploids from AFLP data reveals that the Alpine polyploid complex of Senecio carniolicus (Asteraceae) evolved mainly via autopolyploidy.

摘要: Despite its evolutionary and ecological relevance the mode of polyploid origin has been notoriously difficult to be reconstructed from molecular data. Here, we present a method identify putative parents polyploids thus infer their (auto- versus allopolyploidy) Amplified Fragment Length Polymorphism (AFLP) To this end, use Cohen's d distances between in silico polyploids, generated within priori defined scenarios delimited parental entities (e.g., taxa, genetic lineages), natural polyploids. Simulations show that discriminatory power proposed increases mainly with increasing divergence lower-ploid ancestors less so delay polyploidization relative time divergence. We apply new Senecio carniolicus aggregate, distributed European Alps comprising two diploid, one tetraploid hexaploid species. In eastern part distribution, S. aggregate was inferred comprise an autopolyploid series, whereas for western populations species allopolyploid involving diploid most likely scenario. Although suggests independent origins, other evidence (ribotype morphology) is consistent hypothesis subsequent introgression by second Altogether, identifying best among alternative using can straightforward, but particular scenarios, such as introgression, remain distinguished. This article protected copyright. All rights reserved.