title: The complete maternal and paternal mitochondrial genomes of Unio crassus: Mitochondrial molecular clock and the overconfidence of molecular dating.
abstract: The availability of a rapidly growing number of complete mitochondrial genome sequences provokes high confidence dating approaches. However, even if the congruence between mitochondrial and nuclear markers is reasonable, the resulting topologies are frequently questionable. The unique opportunity to study the evolutionary history of two independent mitochondrial genomes in one phylogenetic context exists in the freshwater mussels family Unionidae. The two lineages function under doubly uniparental inheritance since well before the emergence of the family. Despite the relatively high number of available complete sequences of maternally inherited genomes, comparative analyses are limited by the small number of sequences of counterpart paternally inherited genomes. We have sequenced for the first time the representative set of five sequences (two maternal and three paternal) from the species Unio crassus. Comparative analysis of the phylogenies reconstructed using relevant mitogenomic data available in GenBank (13 species in total) reveal that single - genome inferences are congruent only if the relaxed clock is assumed.
authors.affiliation: Institute of Oceanology Polish Academy of Sciences, Sopot, Poland. Electronic address: aburzynski@iopan.gda.pl.
authors.forename: Artur
authors.initials: A
authors.lastname: Burzyński
authors.affiliation: Department of Genetics, Faculty of Biology, University of Szczecin, Poland.
authors.forename: Marianna
authors.initials: M
authors.lastname: Soroka
authors.affiliation: Department of Genetics, Faculty of Biology, University of Gdansk, Poland.
authors.forename: Monika
authors.initials: M
authors.lastname: Mioduchowska
authors.affiliation: Department of Genetics, Faculty of Biology, University of Gdansk, Poland.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Kaczmarczyk
authors.affiliation: Department of Genetics, Faculty of Biology, University of Gdansk, Poland.
authors.forename: Jerzy
authors.initials: J
authors.lastname: Sell
mesh_terms: D000818:Animals; D001483:Base Sequence; D004272:DNA, Mitochondrial / Q000235:genetics*; D005260:Female; D054629:Genome, Mitochondrial; D008928:Mitochondria / Q000235:genetics*; D010802:Phylogeny; D013997:Time Factors; D049881:Unio / Q000235:genetics*
chemical_list: D004272:DNA, Mitochondrial
keywords: DUI; Mitogenomics; Molecular clock; Unionidae