Evolution of the mitochondrial DNA control region and cytochrome b genes and the inference of phylogenetic relationships in the avian genus Lophura (Galliformes)

Molecular Phylogenetics and Evolution
E RandiJ D Ligon

Abstract

The entire mitochondrial DNA control region (mtDNA CR) and cytochrome b (cyt b) genes were sequenced in 10 of the 11 extant species of gallopheasants (Lophura). The cyt b from L. diardi and L. ignita showed unusual leucine-coding codons at the expected terminal 3' end of the gene. Presence of conserved functional motifs in the inferred amino acid sequences, conserved secondary structures of the flanking tRNA(Pro) and tRNA(Thr), and Southern hybridization concordantly suggest that these cyt b represent functional mitochondrial genes and not nuclear transpositions. Functional stop codons can be generated by RNA editing of the primary transcripts from these sequences. Despite strong site and domain substitution rate heterogeneity, CR and cyt b diverged at similar rates, on average, and expressed congruent phylogenetic signals. Phylogenetic analyses of the concatenated sequences split Lophura into five clades including (1) L. bulweri, (2) L. diardi-L. ignita, (3) L. erythrophthalma-L. inornata, (4) L. leucomelanos-L. nycthemera, and (5) L. swinhoii-L. edwardsi-L. hatinhensis. Basal relationships among these clades, which include species distributed in continental South East Asia and the Sundaland archipelago, were weakly resolved, ...Continue Reading

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Citations

Apr 7, 2010·Molecular Phylogenetics and Evolution·Xin-kang BaoSen Song
Jul 16, 2009·Molecular Phylogenetics and Evolution·Katy MorganCatherine Walton
Jul 1, 2011·International Journal of Evolutionary Biology·Rebecca T KimballEdward L Braun
Jul 4, 2012·Molecular Phylogenetics and Evolution·Sebastián DuchenePhillip A Morin
Dec 4, 2002·The Journal of Experimental Zoology·David Alfred Ray, Llewellyn Densmore
May 2, 2007·Journal of Genetics and Genomics = Yi Chuan Xue Bao·Yan LiGeorge Amato

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