Molecular evolution and recombination in gender-associated mitochondrial DNAs of the Manila clam Tapes philippinarum.

Abstract:

:Doubly uniparental inheritance (DUI) provides an intriguing system for addressing aspects of molecular evolution and intermolecular recombination of mitochondrial DNA. For this reason, a large sequence analysis has been performed on Tapes philippinarum (Bivalvia, Veneridae), which has mitochondrial DNA heteroplasmy that is consistent with a DUI. The sequences of a 9.2-kb region (containing 29 genes) from 9 individuals and the sequences of a single gene from another 44 individuals are analyzed. Comparisons suggest that the two sex-related mitochondrial genomes do not experience a neutral pattern of divergence and that selection may act with varying strength on different genes. This pattern of evolution may be related to the long, separate history of M and F genomes within their tissue-specific "arenas." Moreover, our data suggest that recombinants, although occurring in soma, may seldom be transmitted to progeny in T. philippinarum.

journal_name

Genetics

journal_title

Genetics

authors

Passamonti M,Boore JL,Scali V

keywords:

subject

Has Abstract

pub_date

2003-06-01 00:00:00

pages

603-11

issue

2

eissn

0016-6731

issn

1943-2631

journal_volume

164

pub_type

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