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ma_et_al_2015 [2019/11/02 17:25]
floyd
ma_et_al_2015 [2019/11/02 17:28]
floyd
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   * https://​www.mdpi.com/​1422-0067/​16/​10/​25031   * https://​www.mdpi.com/​1422-0067/​16/​10/​25031
   * https://​scholar.google.com/​scholar?​cluster=5636090258695337486   * https://​scholar.google.com/​scholar?​cluster=5636090258695337486
 +  * {{private:​maetal2015.pdf}} (internal lab link)
  
  
 ==Abstract== ==Abstract==
 To understand the molecular evolution of mitochondrial genomes (mitogenomes) in the genus //​Odontobutis//,​ the mitogenome of //​Odontobutis yaluensis// was sequenced and compared with those of another four //​Odontobutis//​ species. Our results displayed similar mitogenome features among species in genome organization,​ base composition,​ codon usage, and gene rearrangement. The identical gene rearrangement of //​trnS-trnL-trnH//​ tRNA cluster observed in mitogenomes of these five closely related freshwater sleepers suggests that this unique gene order is conserved within //​Odontobutis//​. Additionally,​ the present gene order and the positions of associated intergenic spacers of these //​Odontobutis//​ mitogenomes indicate that this unusual gene rearrangement results from tandem duplication and random loss of large-scale gene regions. Moreover, these mitogenomes exhibit a high level of sequence variation, mainly due to the differences of corresponding intergenic sequences in gene rearrangement regions and the heterogeneity of tandem repeats in the control regions. Phylogenetic analyses support //​Odontobutis//​ species with shared gene rearrangement forming a monophyletic group, and the interspecific phylogenetic relationships are associated with structural differences among their mitogenomes. The present study contributes to understanding the evolutionary patterns of Odontobutidae species. To understand the molecular evolution of mitochondrial genomes (mitogenomes) in the genus //​Odontobutis//,​ the mitogenome of //​Odontobutis yaluensis// was sequenced and compared with those of another four //​Odontobutis//​ species. Our results displayed similar mitogenome features among species in genome organization,​ base composition,​ codon usage, and gene rearrangement. The identical gene rearrangement of //​trnS-trnL-trnH//​ tRNA cluster observed in mitogenomes of these five closely related freshwater sleepers suggests that this unique gene order is conserved within //​Odontobutis//​. Additionally,​ the present gene order and the positions of associated intergenic spacers of these //​Odontobutis//​ mitogenomes indicate that this unusual gene rearrangement results from tandem duplication and random loss of large-scale gene regions. Moreover, these mitogenomes exhibit a high level of sequence variation, mainly due to the differences of corresponding intergenic sequences in gene rearrangement regions and the heterogeneity of tandem repeats in the control regions. Phylogenetic analyses support //​Odontobutis//​ species with shared gene rearrangement forming a monophyletic group, and the interspecific phylogenetic relationships are associated with structural differences among their mitogenomes. The present study contributes to understanding the evolutionary patterns of Odontobutidae species.
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