A New Natural Autotetraploid and Chromosomal Characteristics of Dwarf Snakehead Fish, &lt;i&gt;Channa gachua&lt;/i&gt; (Perciformes, Channidae) in Thailand

Tanomtong, Alongklod; Supiwong, Weerayuth; Jearranaiprepame, Pornpimol; Khakhong, Suthip; Kongpironchuen, Chanyut; Getlekha, Nuntaporn

doi:10.1508/cytologia.79.15

Cited by 11 publications

(14 citation statements)

References 46 publications

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“…striata is thought to be the most differentiated species, considering the 5S rDNA distribution in the karyotype. Coincidentally, these data support the chromosomal phylogeny proposed by one report [ 25 ], where C . striata was located in a different evolutionary path than that shared by C .…”

Section: Discussionsupporting

confidence: 90%

“…The evolutionary relationships for Asian snakeheads fishes and their probable divergence times within the Channidae family were proposed by one study [ 2 ] based on phylogenetic analyses. In addition, a putative evolutionary pathway based on the karyotypes of some Channa species highlighted a parallel with Adamson’s data [ 25 ]. Among these species, C .…”

Section: Discussionmentioning

confidence: 83%

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Genomic Organization of Repetitive DNA Elements and Its Implications for the Chromosomal Evolution of Channid Fishes (Actinopterygii, Perciformes)

et al. 2015

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Channid fishes, commonly referred to as “snakeheads”, are currently very important in Asian fishery and aquaculture due to the substantial decline in natural populations because of overexploitation. A large degree of chromosomal variation has been found in this family, mainly through the use of conventional cytogenetic investigations. In this study, we analyzed the karyotype structure and the distribution of 7 repetitive DNA sequences in several Channa species from different Thailand river basins. The aim of this study was to investigate the chromosomal differentiation among species and populations to improve upon the knowledge of its biodiversity and evolutionary history. Rearrangements, such as pericentric inversions, fusions and polyploidization, appear to be important events during the karyotypic evolution of this genus, resulting in the chromosomal diversity observed among the distinct species and even among populations of the same species. In addition, such variability is also increased by the genomic dynamism of repetitive elements, particularly by the differential distribution and accumulation of rDNA sequences on chromosomes. This marked diversity is likely linked to the lifestyle of the snakehead fishes and their population fragmentation, as already identified for other fish species. The karyotypic features highlight the biodiversity of the channid fishes and justify a taxonomic revision of the genus Channa, as well as of the Channidae family as a whole, as some nominal species may actually constitute species complexes.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 83%

Genomic Organization of Repetitive DNA Elements and Its Implications for the Chromosomal Evolution of Channid Fishes (Actinopterygii, Perciformes)

et al. 2015

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“…Moreover, among the three sequences of Anabas testudineus, one sequence deviated from the rest with 83% bootstrap value and we suspect this an exotic variety (Thai koi) which is now available everywhere in the country. Channa orientalis was documented in Bangladesh (Siddiqui et al 2007, IUCN 2015 which is an endemic species of Sri Lanka, and it often misidentified as C. gachua (Tanomtong et al 2014). The major morphological difference between the two species is that C. gachua has ventral fins and C. orientalis lack of ventral fin.…”

Section: Discussionmentioning

confidence: 99%

Molecular diversity of freshwater fishes of Bangladesh assessed by DNA barcoding

Ahmed

Datta

Zhilik

2020

Bangladesh J. Zool.

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This study represents the comprehensive molecular identification of freshwater fishes of Bangladesh based on a fragment of the cytochrome c oxidase subunit I (COI) gene in the mitochondrial genome. A total of 315 mitochondrial COI barcode sequences were obtained from 153 species,114 genera, 49 families and 16 orders of fishes. The mean length of the sequences was 652 base pairs. For all the samples, %G was significantly lower compared to the other nucleotides and %GC was lower compared to %AT (p-value ˂ 0.05). Also, a significantly lower %GC content was observed in second and third codon position compared to the first one in all the samples (1st>2nd>3rd, p-value˂ 0.05). The average K2P distances within species, genera, families and orders were 0.38%, 7.02%, 12.75% and 18.68%, respectively. The mean interspecific distance was 18-fold higher than the mean intraspecific distance. The K2P neighbor-joining (NJ) trees based on the sequences generally clustered species according to their taxonomic position. A total of 12 species were newly recorded in Bangladesh. High efficiency in species identification were demonstrated in the present study by DNA barcoding, and concluded that COI sequencing can be used as an authentic identification marker for freshwater fish species. Bangladesh J. Zool. 48(1): 1-19, 2020

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“…The fundamental number (number of chromosome arm, NF) was obtained by assigning a value of two to metacentric, submetacentric and acrocentric chromosomes and one to telocentric chromosome. All parameters were used in karyotyping and idiogramming (Tanomtong et al 2014, Chooseangjaew et al 2017).…”

Section: Chromosome Characterizationmentioning

confidence: 99%

First chromosome analysis of Thai pufferfish Pao cochinchinensis (Steindachner, 1866)

et al. 2020

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Abstract. Pissaparn M, Phimphan S, Chaiyasan P, Tanoamtong A, Liehr T, Suwannapoom C, Reungsing M, Supiwong W. 2020. First chromosome analysis of Thai pufferfish Pao cochinchinensis (Steindachner, 1866). Biodiversitas 21: 4309-4316. Here first analysis of chromosomes and nucleolar organizer region (NOR) pattern in pufferfish Pao cochinchinensis (Steindachner, 1866) was undertaken. Chromosomal preparations were obtained from kidney of P. cochinchinensis from Chi River basin in Thailand. Chromosomal characteristics were analyzed by Giemsa staining, Ag-NOR banding as well as fluorescence in situ hybridization (FISH) using microsatellites d(CA)15 and d(CGG)10 probes. P. cochinchinensis had 2n = 40 with the fundamental number (NF) 74, both in male and female. The karyotype exhibited 12 metacentric (m), 10 submetacentric (sm), 12 acrocentric (a) and 6 telocentric (t) chromosomes. No differentiated heteromorphic sex chromosomes were observed. NORs were located on short arms adjacent to telomere of the metacentric chromosome pair 4, which coincide with signals of d(CGG)10 probe. FISH with d(CGG)10 sequences were also displayed at the telomeres of most other chromosomes, whereas d(CA)15 repeats highly accumulated throughout almost all entire chromosomes except for centromeric regions. The results of conventional Giemsa staining presented the differentiation even the same genus. The localization of NORs on one pair of chromosomes only is a common characteristic found in many fish groups as well as other vertebrates. Mapping of two distinct microsatellites demonstrated the remarkable chromosomal diversification that characterizes evolution in the genus Pao. Both, conventional and molecular cytogenetics are excellent tools to study, and better understand chromosomal evolution, as well as to uncover biodiversity among fishes.

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A New Natural Autotetraploid and Chromosomal Characteristics of Dwarf Snakehead Fish, <i>Channa gachua</i> (Perciformes, Channidae) in Thailand

Cited by 11 publications

References 46 publications

Genomic Organization of Repetitive DNA Elements and Its Implications for the Chromosomal Evolution of Channid Fishes (Actinopterygii, Perciformes)

Genomic Organization of Repetitive DNA Elements and Its Implications for the Chromosomal Evolution of Channid Fishes (Actinopterygii, Perciformes)

Molecular diversity of freshwater fishes of Bangladesh assessed by DNA barcoding

First chromosome analysis of Thai pufferfish Pao cochinchinensis (Steindachner, 1866)

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