Chromosomal Analysis of Two Snakehead Fishes, <i>Channa marulius</i> (Hamilton, 1822) and <i>C. marulioides</i> (Bleeker, 1851) (Perciformes: Channidae) in Thailand

Abstract

The snakeheads, freshwater perciform fish are the member of the family Channidae. The karyotype diversification was observed in this species. In this study, we investigate the karyotype and chromosomal characteristic of nucleolar organizing regions (NORs) in Channa marulius (Hamilton, 1822) and C. marulioides (Bleeker, 1851) from Thailand. The metaphase chromosomes were prepared from kidney cells of five male and five female fishes. Conventional and Ag-NOR staining techniques were applied to the chromosomes. The results revealed that: the diploid chromosome number (2n) of C. marulius was 44, fundamental number (NF) was 56, the karyotype formula should be deduced as 2n=L m 4 +L a 6 +L t 10 +M a 2 +M t 22 , the NORs are located at the telomeric position of the short arm of chromosome pairs 3 and 4; the 2n of C. marulioides was 38, NF was 68, the karyotype formula should be deduced as 2n=L m 8 +L a 2 +M m 2 +M a 18 +M t 8 , the NORs are located at the telomeric position of the short arm of chromosome pairs 10 and 11. The difference of 2n and NF in males and females fish was not observed. The number of Ag-NORs in metaphase cell varies between two and four among the cells in the same sample both in C. marulius and C. marulioides.

Comparative cytogenetic analysis of fishes in the genus Trichopodus (Osphronemidae) in Thailand

“…The NORs are used as markers to detect species-specific character and indicate intra-and interspecies chromosomal polymorphism in many groups of fishes (Cioffi et at. 2015;Phimphan et al 2015;Sarasan et al 2018;Kasiroek et al 2017;Yeesin et al 2021). The Ag-NOR positions were shown on the single chromosome pair.…”

Worldwide Research Trends on Microalgae and Recent Work in Cytologia

“…Alongklod Tanomtong s group from Khon Kaen University, Thailand, is playing an active role. They have investigated the karyotype and chromosome characteristics of nucleolar organizing regions (NORs) in Thai fishes, including the snakeheads Channa marulius and C. marulioides (Perciformes: Channidae) (Sarasan et al 2018), hihgfin barb, Cyclocheilichthys armatus (Cypriniformes, Cyprinidae) from the Chao Phraya River (Chaiyasan et al 2018), and longfin carp, Labiobarbus leptocheilus (Cypriniformes, Cyprinidae) from the Mekong Basin (Saenjundaeng et al 2018). They have also published papers on the tropical oyster Crassostrea iredalei (Ostreoida, Ostreidae) from Nakhon Si Thammarat province (Chooseangjaew et al 2018) and black lancer, Bagrichthys majusculus (Siluriformes, Bagridae) from Nakhon Phranom and Sing Buri provinces (Supiwong et al 2018).…”

History and New Developments on the 90th Anniversary of Cytologia: On the Occasion of the Publication of “Dawn of Modern Wheat Genetics”

“…In Thailand, including Indochina and the northern Malay peninsula, Alongklod Tanomtong and coworkers have recently focused on fish karyotype analysis and have published 15 reports in Cytologia over the last 2 years on the following fish species: Humpback cardinalfish, Fibramia lateralis (Kasiroek et al 2017a); Banggai cardinalfish, Pterapogon kauderni (Kasiroek et al 2017b); triangle butterflyfish, Chaetodon triangulum and yellow butterflyfish, C. andamanensis (Supiwong et al 2017a); Indian vagabond butterflyfish, Chaetodon decussatus and Lined butterflyfish, C. lineolatus (Supiwong et al 2017b); Nile tilapia, Oreochromis niloticus (Sriuttha et al 2017); three-spot damselfish, Dascyllus trimaculatus (Getlekha et al 2017); ocellated dragonet, Synchiropus ocellatus and picturesque dragonet, S. picturatus (Kasiroek et al 2017c); crystal eye catfish, Hemibagrus wyckii (Supiwong et al 2017d); Chevey s sheetfish, Micronema cheveyi (Pinthong et al 2017); F 1 hybrid catfish: Mekong giant catfish, Pangasianodon gigas striped catfish, P. hypophthalmus and spot pangasius, Pangasius larnaudii Pangasianodon hypophthalmus (Sreeputhorn et al 2017); whitecheek monocle bream, Scolopsis vosmeri (Supiwong et al 2017c); snakehead fishes, Channa marulius and C. marulioides (Sarasan et al 2018); Hihgfin barb fish, Cyclocheilichthys armatus (Chaiyasan et al 2018); black lancer, Bagrichthys majusculus (Supiwong et al 2018); and longfin carp, Labiobarbus leptocheilus (Saenjundaeng et al 2018).…”