Skip to main content
Fig. 4 | BMC Biology

Fig. 4

From: Discordant evolution of mitochondrial and nuclear yeast genomes at population level

Fig. 4

Intron phylogeny underlies both loss and gain events. a The distribution of intron presence and absence is not consistent with the mitochondrial tree phylogeny. The rare introns bi1α and ai3β are highlighted (bold); intron ai4γ was not found in the sequenced collection and not shown. b Only 4 non-redundant sequences have been found for cox1 ai3β intron. Their sequences are unrelated to other Saccharomyces species, which could not be used for rooting. The peculiarity of the distribution of this intron could suggest a lineage-specific gain event. c Rooted tree of the COB intron bi1α using S. paradoxus and S. eubayanus sequences as an outgroup. Nodes with bootstrap values below 0.5 have been collapsed. Its presence in multiple highly divergent Asian lineages and in other Saccharomyces species is consistent with intron loss following the out-of-China dispersal. The isolate CQS, which harbours introgression in both nuclear and mitochondrial genome, also derive from S. paradoxus origin. This is compatible with the downstream exonic sequence, which also is introgressed

Back to article page