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Zhou A.,South China Agricultural University | Chen J.,South China Agricultural University | Chen J.,Qingyuan North River Fishery Science Institute | Xie S.,South China Agricultural University | And 3 more authors.
Mitochondrial DNA | Year: 2016

The complete sequence of the mitochondrial genome of Ophicephalus argus kimurai was determined in this study. The genome was 16,558 bp in length. As in other vertebrates, it consisted of 22 transfer RNA (tRNA) genes, 13 protein-coding genes, 2 ribosomal RNA (rRNA) genes and 1 noncoding control region. The overall base composition was estimated to be A, 27.2%; T, 24.2%; C, 31.6% and G, 17% with AT bias of 51.4%. The genomic composition, organization, and gene order of O. argus kimurai was similar to that obtained in most vertebrates. These results may provide the basis for the study of genetic structure as well as resource conservation and protection of O. argus kimurai. © 2014 Informa UK Ltd.


Zhou A.,South China Agricultural University | Zhou A.,Qingyuan North River Fishery Science Institute | Zhuo X.,Qingyuan North River Fishery Science Institute | Zou Q.,South China Agricultural University | And 4 more authors.
Mitochondrial DNA | Year: 2015

Genetic variation and population structure of northern snakehead (Channa argus) from eight locations in China were investigated using mitochondrial DNA control region and adjacent regions sequences. Sequence analysis showed that there were 105 haplotypes in 260 individuals, 48 unique haplotypes and 57 shared haplotypes, but no common haplotype shared by all populations. As a whole, the haplotype diversity was high (h=0.989), while the nucleotide diversity was low (π=0.00482). AMOVA analysis detected significant genetic differentiation among all eight populations (FST=0.328, p<0.01) and 66.17% of the total variance was resulted from intra-population differentiation. UPGMA analysis indicated that the eight populations could be divided into four major clusters, which was consistent with that the eight sampled locations were belonged to four isolated river systems. The neutrality and mismatch distribution tests suggested that the eight populations of C. argus in the sampling locations underwent recent population expansion. Among the eight populations, the Erhai Lake population may represent a unique genetic resource and therefore needs to be conserved. © 2014 Informa UK Ltd. All rights reserved: reproduction in whole or part not permitted.


Chen J.,South China Agricultural University | Zhou A.,South China Agricultural University | Xie S.,South China Agricultural University | Wang C.,South China Agricultural University | And 3 more authors.
PLoS ONE | Year: 2016

To understand the molecular responses of mature and immature sperm in the catfish Cranoglanis bouderius, we used the iTRAQ proteomics approach to perform proteomic profiling of spermatogenesis in C. bouderius. As a result, 1,941 proteins were identified, including 361 differentially expressed proteins, 157 upregulated proteins and 204 downregulated proteins in mature sperm relative to immature sperm. All of the identified proteins were categorized into seven types of subcellular localizations and three molecular functions and were found to be involved in nine biological processes. All of the differential proteins were involved in 235 different pathways. Moreover, we found that the tricarboxylic acid (TCA) pathway played an important role in the energy metabolism of sperm and that the EABB pathway was involved in the mechanism of spermatogenesis. Our study is the first to use the iTRAQ-based proteomic approach to analyze the catfish sperm proteome, and the results we obtained using this approach are valuable for understanding the molecular mechanisms of fish spermatogenesis. © 2016 Chen et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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