Abstract
The complete mitogenomes of one (M-)ale (North America), one Hermaphroditic (Europe), and two (F-)emale (North America and Europe) individuals of the freshwater pearl mussel Margaritifera margaritifera were sequenced. The M-type and F-type (Female and Hermaphroditic) mitogenomes have 17,421 and 16,122 nucleotides, respectively. All with the same content: 13 protein-coding genes, 22 transfer RNA, two ribosomal RNA genes, and one sex-related ORF. The M-type is highly divergent (37.6% uncorrected p-distance) from the F-type mitogenomes. North American and European F-type mitogenomes exhibit low genetic divergence (68 nt substitutions), and the Female and Hermaphroditic European mitogenomes are almost identical, and matching sex-related ORFs.
Highlights
The Margaritiferidae (Bivalvia: Unionida), comprising 16 extant species, represents the most threatened freshwater mussel family (Lopes-Lima et al 2018)
Under doubly uniparental inheritance (DUI), both males and females inherit F-type mitochondrial DNA from their mothers, while males inherit mitogenomes of one (M-)type mitochondrial DNA from their fathers, which predominates in gonad tissue (Hoeh et al 1996; Amaro et al 2017)
Sequence divergence was assessed using MEGA7 software (Kumar et al 2016). The length of both mitogenome types (M-type: 17,421 nt; and F-type: 16,122 nt) of M. margaritifera sequenced in this study is within the expected range for each gender-specific haplotypes within Margaritiferidae (Guerra et al 2017; Lopes-Lima et al 2017)
Summary
The Margaritiferidae (Bivalvia: Unionida), comprising 16 extant species, represents the most threatened freshwater mussel family (Lopes-Lima et al 2018). The M-type and F-type mitochondrial lineages show high levels of divergence within species of Unionida freshwater mussels and even distinct gene order arrangements (Fonseca et al 2016; Froufe et al 2016; Guerra et al 2017).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
