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Evolutionary analysis of genus Channa based on karyological and 16S rRNA sequence data

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Title Evolutionary analysis of genus Channa based on karyological and 16S rRNA sequence data
Not Available
 
Creator Ravindra Kumar
Vishwamitra Singh Baisvar
Basdeo Kushwaha
Gusheinzed Waikhom
Mahender Singh
 
Subject AgNO3
nucleolar organizer region
Channa genus
chromomycin A3
giemsa
karyotype
IUCN red list.
 
Description Not Available
A wide range of diploid number of chromosomes and the body size of Channa congeners are useful combination of characters for studying the factors controlling the body size. In this study, the karyological information was superimposed on the evolutionary tree generated by 16S rRNA mitochondrial gene sequences. Here, the metaphase chromosome complements stained with Giemsa, AgNO3 and CMA3 were prepared from six snakehead murrel fish species collected from northeast India. The diploid chromosome numbers and the fundamental arms of C. aurantimaculata (2n = 52, NF = 98), C. gachua (2n = 56, NF = 84), C. marulius (2n = 44, NF = 58), C. orientalis (2n = 52, NF = 74), C. punctata (2n = 32, NF = 60) and C. striata (2n = 40, NF = 48) were calculated by the analysis of metaphase chromosome complements. Both methods of nucleolar organizer region (NOR) localization, silver nitrate and chromomycin A3, revealed NOR pairs of 1, 2, 3, 1, 4 and 3 in C. aurantimaculata, C. gachua, C. marulius, C. orientalis, C. punctata and C. striata, respectively. The subject species showed primitive type of asymmetrical chromosomes, except the C. punctata. The variation in 2n for C. orientalis (2n = 52, 78) and C. gachua (2n = 52, 78, 104) of a complete haploid set indicates the possibility of either ploidy change in C. orientalis and C. gachua, if we consider 2n = 52 or the Robertsonian rearrangements in different populations of these two species. The chromosome evolution tree was constructed on 16S rRNA ML-phylogenetic tree using ChromEvol 1.3. The analysis of chromosome evolution explained the loss or gain of chromosome, duplications or semiduplications mechanism. For time scaling the chromosome evolution, the node age of available 16S rRNA gene of Channa species were estimated, which was also used for estimating the time when chromosomal changes occurred in context of geological time-scale
Department of Biotechnology, Government of India, New Delhi
 
Date 2021-07-24T11:27:02Z
2021-07-24T11:27:02Z
2019-11-22
 
Type Research Paper
 
Identifier Ravindra Kumar, Vishwamitra Singh Baisvar, Basdeo Kushwaha, Gusheinzed Waikhom and Mahender Singh* (2019) Evolutionary analysis of genus Channa based on karyological and 16S rRNA sequence data. Journal of Genetics. 98: 112. https://doi.org/10.1007/s12041-019-1156-4
0973-7731
http://krishi.icar.gov.in/jspui/handle/123456789/49903
 
Language English
 
Relation Not Available;
 
Publisher Springer India