期刊
SYSTEMATIC BIOLOGY
卷 59, 期 1, 页码 59-73出版社
OXFORD UNIV PRESS
DOI: 10.1093/sysbio/syp077
关键词
Brownie; gene tree parsimony; gene tree species tree; speciation; species delimitation
资金
- National Science Foundation [EF-0423641]
Species delimitation and species tree inference are difficult problems in cases of recent divergence, especially when different loci have different histories. This paper quantifies the difficulty of jointly finding the division of samples to species and estimating a species tree without constraining the possible assignments a priori. It introduces a parametric and a nonparametric method, including new heuristic search strategies, to do this delimitation and tree inference using individual gene trees as input. The new methods were evaluated using thousands of simulations and 4 empirical data sets. These analyses suggest that the new methods, especially the nonparametric one, may provide useful insights for systematists working at the species level with molecular data. However, they still often return incorrect results.
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