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Compatibility limit of S. cerevisiae nuclear genome and mitochondrial genomes from related yeasts. Phylogenetic tree of Saccharomyces species based on the comparison of (A) nuclear 26S rDNAs sequence and (B) mitochondrial cox2 gene. Branch lengths, based on nucleotide substitutions, are indicated by the bar. Bootstrap values of 1000 replications are marked by arrows at the branches points. Values less than 50% are not given. Schizosaccharomyces pombe was used as outgroup.
