The genome of walking catfish Clarias magur (Hamilton, 1822) unveils the genetic basis that may have facilitated the development of environmental and terrestrial adaptation systems in air-breathing catfishes.
Clarias magur
environmental adaptation
genomics
walking catfish
whole genome
Journal
DNA research : an international journal for rapid publication of reports on genes and genomes
ISSN: 1756-1663
Titre abrégé: DNA Res
Pays: England
ID NLM: 9423827
Informations de publication
Date de publication:
19 Jan 2021
19 Jan 2021
Historique:
received:
14
08
2020
accepted:
21
12
2020
pubmed:
9
1
2021
medline:
3
7
2021
entrez:
8
1
2021
Statut:
ppublish
Résumé
The walking catfish Clarias magur (Hamilton, 1822) (magur) is an important catfish species inhabiting the Indian subcontinent. It is considered as a highly nutritious food fish and has the capability to walk to some distance, and survive a considerable period without water. Assembly, scaffolding and several rounds of iterations resulted in 3,484 scaffolds covering ∼94% of estimated genome with 9.88 Mb largest scaffold, and N50 1.31 Mb. The genome possessed 23,748 predicted protein encoding genes with annotation of 19,279 orthologous genes. A total of 166 orthologous groups represented by 222 genes were found to be unique for this species. The Computational Analysis of gene Family Evolution (CAFE) analysis revealed expansion of 207 gene families and 100 gene families have rapidly evolved. Genes specific to important environmental and terrestrial adaptation, viz. urea cycle, vision, locomotion, olfactory and vomeronasal receptors, immune system, anti-microbial properties, mucus, thermoregulation, osmoregulation, air-breathing, detoxification, etc. were identified and critically analysed. The analysis clearly indicated that C. magur genome possessed several unique and duplicate genes similar to that of terrestrial or amphibians' counterparts in comparison to other teleostean species. The genome information will be useful in conservation genetics, not only for this species but will also be very helpful in such studies in other catfishes.
Identifiants
pubmed: 33416875
pii: 6070145
doi: 10.1093/dnares/dsaa031
pmc: PMC7934567
pii:
doi:
Substances chimiques
Fish Proteins
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© The Author(s) 2021. Published by Oxford University Press on behalf of Kazusa DNA Research Institute.
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