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Mitochondrial phylogenomics of the Bivalvia (Mollusca): searching for the origin and mitogenomic correlates of doubly uniparental inheritance of mtDNA
Authors:Hélène Doucet-Beaupré  Sophie Breton  Eric G Chapman  Pierre U Blier  Arthur E Bogan  Donald T Stewart  Walter R Hoeh
Institution:1.Département de Biologie,Université du Québec à Rimouski,Rimouski,Canada;2.Department of Biological Sciences,Kent State University,Kent,USA;3.Department of Entomology,University of Kentucky,Lexington,USA;4.North Carolina State Museum of Natural Sciences,Research Laboratory, MSC 1626, Raleigh,USA;5.Department of Biology,Acadia University,Wolfville,Canada
Abstract:

Background  

Doubly uniparental inheritance (DUI) is an atypical system of animal mtDNA inheritance found only in some bivalves. Under DUI, maternally (F genome) and paternally (M genome) transmitted mtDNAs yield two distinct gender-associated mtDNA lineages. The oldest distinct M and F genomes are found in freshwater mussels (order Unionoida). Comparative analyses of unionoid mitochondrial genomes and a robust phylogenetic framework are necessary to elucidate the origin, function and molecular evolutionary consequences of DUI. Herein, F and M genomes from three unionoid species, Venustaconcha ellipsiformis, Pyganodon grandis and Quadrula quadrula have been sequenced. Comparative genomic analyses were carried out on these six genomes along with two F and one M unionoid genomes from GenBank (F and M genomes of Inversidens japanensis and F genome of Lampsilis ornata).
Keywords:
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