Figure 1.

Long-standing unresolved Ursidae phylogeny (tree in the left) and competing hypotheses proposed based on previous sequence data (mtA-E and nuA-B). Trees were constructed from (mtA) combined analysis of partial control region, 12SrRNA, CYTB, tRNAPro, and tRNAThr mt genes [11], (mtB) MP analysis of complete CYTB, tRNAPro, and tRNAThr mt genes [12], (mtC) NJ analysis of complete CYTB, tRNAPro, and tRNAThr mt genes [12], (mtD) combined analysis of partial control region, CYTB, ND4, ND5, COII, and 16SrRNA mt genes [8], (mtE) combined analysis of partial control region, 12SrRNA, complete CYTB, tRNAPro, and tRNAThr mt genes [13], (nuA) combined analysis of interphotoreceptor retinoid binding protein (IRBP) exon1 and transthyretin (TTR) intron 1 nuclear genes [13], and (nuB) combined analysis of four type I sequence-tagged sites (STS) and IRBP exon 1 nuclear genes [60].

Yu et al. BMC Evolutionary Biology 2007 7:198   doi:10.1186/1471-2148-7-198
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