Nucleolar Organizer Regions Polymorphism and Karyological Analysis of Black Lancer, <i>Bagrichthys majusculus</i> (Siluriformes, Bagridae) in Thailand

Abstract

Nucleolar organizer regions (NORs) and karyotype in the black lancer, Bagrichthys majusculus from Nakhon Phranom and Sing Buri provinces, Thailand, were investigated. The mitotic chromosome preparations were directly obtained from kidney tissues of eight male and eight female specimens. Conventional and Ag-NOR staining techniques were applied to the chromosomes. The chromosomes number of B. majusculus was 2n=50 and the fundamental number (NF) of all specimens was 96. The karyotype consists of six large metacentric, six large submetacentric, two large acrocentric, eight medium metacentric, 12 medium submetacentric, two medium acrocentric, six small metacentric, four small submetacentric and four small telocentric chromosomes. Sex chromosome was not observed. Moreover, the interstitial NORs were clearly observed at the long arm of the metacentric chromosome pair 1. The result revealed that a heteromorphic NOR type was appeared in one male and one female fish and other fish have homozygous NOR in the pair 1 chromosomes.

Comparative study of four Mystus species (Bagridae, Siluriformes) from Thailand: insights into their karyotypic diversity

“…vittatus (Khuda-Bukhsh andBarat 1987;John et al 1992). This character is a common characteristic found in many species in this family such as Bagrichthys majusculus Ng, 2002(Supiwong et al 2018), He. menoda (Hamilton, 1822 (Barat and Khuda-Bukhsh 1986), He.…”

Worldwide Research Trends on Microalgae and Recent Work in Cytologia

“…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).…”