如何评价基因树不一致的物种树.pdfVIP

Syst. Biol. 58(5):463–467, 2009 c The Author(s) 2009. Published by Oxford University Press, on behalf of the Society of Systematic Biologists. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org DOI:10.1093/sysbio/syp061 Advance Access publication on September 17, 2009 Estimating Species Trees: Methods of Phylogenetic Analysis When There Is Incongruence across Genes L. LACEY KNOWLES ∗ Department of Ecology and Evolutionary Biology, Museum of Zoology, University of Michigan, Ann Arbor, MI 48109-1079, USA; ∗Correspondence to be sent to: Museum of Zoology, 1109 Geddes Avenue, University of Michigan, Ann Arbor, MI 48109-1079, USA; E-mail: knowlesl@umich.edu. Discord among the gene trees of multilocus data has Maddison 1997; Rosenberg 2002). For any single species motivated the development of phylogenetic approaches tree (i.e., specific topology and branch lengths), coales- that account for gene-tree heterogeneity in the esti- cent theory gives the probability distribution of gene mation procedure. Rather than equating a gene tree trees (i.e., the probability for each gene-tree topology, D o with the phylogenetic history, the new approaches ex- including those topologies that do and do not match the w n