Body mass and temperature influence rates of mitochondrial DNA evolution in North American cyprinid fish.
نویسندگان
چکیده
The mass-specific metabolic rate hypothesis of Gillooly and others predicts that DNA mutation and substitution rates are a function of body mass and temperature. We tested this hypothesis with sequence divergences estimated from mtDNA cytochrome b sequences of 54 taxa of cyprinid fish. Branch lengths estimated from a likelihood tree were compared with metabolic rates calculated from body mass and environmental temperatures experienced by those taxa. The problem of unknown age estimates of lineage splitting was avoided by comparing estimated amounts of metabolic activity along phyletic lines leading to pairs of modern taxa from their most recent common ancestor with sequence divergences along those same pairs of phyletic lines. There were significantly more pairs for which the phyletic line with greater genetic change also had the higher metabolic activity, when compared to the prediction of a hypothesis that body mass and temperature are not related to substitution rate.
منابع مشابه
Phylogenetic relationships of the western North American cyprinid genus Richardsonius, with an overview of phylogeographic structure.
Diversification of many North American taxa, including freshwater fishes, has been heavily influenced by the effects of complex geological and climatic events throughout the Cenozoic that have significantly altered the landscape. Here, we employ an array of phylogenetic analyses using a multiple gene tree approach to address several questions regarding the phylogenetic relationships of the Nort...
متن کاملComplete mitochondrial genome of the speckled dace Rhinichthys osculus, a widely distributed cyprinid minnow of western North America.
The speckled dace Rhinichthys osculus (order Cypriniformes), also known as the carpita pinta, is a small cyprinid minnow native to western North America. Here, we report the sequencing of the full mitochondrial genome (mitogenome) of R. osculus from a male fish collected from the Amargosa River Canyon in eastern California, USA. The assembled mitogenome is 16 658 base pair (bp) nucleotides, and...
متن کاملThe study of the plerocercoid of diphyllobothriidae (cestoda, pseudophyllidea) in two cyprinid hosts, Abramis brama and Alburnoides bipunctatus from north and northwest of Iran
BACKGROUND: The plerocercoid stage of Pseudophyllideancestoda infected a wide range of fresh water fish,particularly the members of the Cyprinidae family. The parasitespecies are the most common pathogens that have severe effectson fish. OBJECTIVES: The aim of the present study is todetermine the occurrence and distribution of the plerocercoid ofDiphyllobothriidae in two freshwater fish from no...
متن کاملUnequal synonymous substitution rates within and between two protein-coding mitochondrial genes.
Genes encoded by mitochondrial DNA display considerable heterogeneity of sequence change. Among protein-coding genes, rates and patterns of nonsynonymous nucleotide substitutions are influenced by differential selective constraints relative to amino acid composition and function of the gene product. Synonymous substitutions are presumably free of functional constraints on amino acid sequence. H...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Evolution; international journal of organic evolution
دوره 61 5 شماره
صفحات -
تاریخ انتشار 2007